./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:38:41,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:38:41,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:38:41,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:38:41,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:38:41,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:38:41,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:38:41,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:38:41,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:38:41,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:38:41,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:38:41,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:38:41,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:38:41,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:38:41,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:38:41,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:38:41,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:38:41,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:38:41,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:38:41,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:38:41,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:38:41,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:38:41,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:38:41,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:38:41,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:38:41,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:38:41,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:38:41,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:38:41,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:38:41,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:38:41,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:38:41,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:38:41,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:38:41,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:38:41,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:38:41,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:38:41,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:38:41,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:38:41,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:38:41,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:38:41,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:38:41,526 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:38:41,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:38:41,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:38:41,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:38:41,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:38:41,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:38:41,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:38:41,553 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:38:41,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:38:41,554 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:38:41,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:38:41,554 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:38:41,554 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:38:41,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:38:41,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:38:41,555 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:38:41,555 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:38:41,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:38:41,556 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:38:41,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:38:41,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:38:41,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:38:41,557 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:38:41,558 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:38:41,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:38:41,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:38:41,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:38:41,559 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:38:41,559 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:38:41,559 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:38:41,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:38:41,560 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:38:41,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:38:41,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:38:41,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:38:41,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:38:41,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:38:41,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:38:41,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:38:41,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:38:41,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:38:41,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:38:41,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:38:41,562 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_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2021-11-25 18:38:41,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:38:41,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:38:41,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:38:41,877 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:38:41,879 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:38:41,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety/test-0235-3.i [2021-11-25 18:38:41,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/data/feb013008/c16cac3a809d47eeac4f3f7afb15b3cb/FLAG1cac2d8ba [2021-11-25 18:38:42,546 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:38:42,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/sv-benchmarks/c/memsafety/test-0235-3.i [2021-11-25 18:38:42,591 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/data/feb013008/c16cac3a809d47eeac4f3f7afb15b3cb/FLAG1cac2d8ba [2021-11-25 18:38:42,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/data/feb013008/c16cac3a809d47eeac4f3f7afb15b3cb [2021-11-25 18:38:42,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:38:42,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:38:42,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:38:42,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:38:42,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:38:42,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:38:42" (1/1) ... [2021-11-25 18:38:42,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e9c0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:42, skipping insertion in model container [2021-11-25 18:38:42,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:38:42" (1/1) ... [2021-11-25 18:38:42,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:38:42,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:38:43,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:38:43,403 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:38:43,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:38:43,515 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:38:43,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43 WrapperNode [2021-11-25 18:38:43,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:38:43,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:38:43,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:38:43,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:38:43,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,588 INFO L137 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2021-11-25 18:38:43,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:38:43,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:38:43,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:38:43,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:38:43,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:38:43,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:38:43,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:38:43,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:38:43,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (1/1) ... [2021-11-25 18:38:43,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:38:43,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:43,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:38:43,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:38:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:38:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:38:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:38:43,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:38:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-11-25 18:38:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-11-25 18:38:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:38:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:38:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2021-11-25 18:38:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2021-11-25 18:38:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:38:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:38:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:38:43,879 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:38:43,883 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:38:44,645 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:38:44,706 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:38:44,706 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-25 18:38:44,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:44 BoogieIcfgContainer [2021-11-25 18:38:44,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:38:44,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:38:44,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:38:44,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:38:44,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:38:42" (1/3) ... [2021-11-25 18:38:44,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44615205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:38:44, skipping insertion in model container [2021-11-25 18:38:44,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:43" (2/3) ... [2021-11-25 18:38:44,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44615205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:38:44, skipping insertion in model container [2021-11-25 18:38:44,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:44" (3/3) ... [2021-11-25 18:38:44,718 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2021-11-25 18:38:44,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:38:44,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2021-11-25 18:38:44,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:38:44,778 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:38:44,778 INFO L340 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2021-11-25 18:38:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 106 states have (on average 2.1320754716981134) internal successors, (226), 195 states have internal predecessors, (226), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 18:38:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:38:44,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:44,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:38:44,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:38:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 464033, now seen corresponding path program 1 times [2021-11-25 18:38:44,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:44,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867517623] [2021-11-25 18:38:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:44,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:44,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:44,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867517623] [2021-11-25 18:38:44,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867517623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:44,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:44,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:38:44,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951382090] [2021-11-25 18:38:44,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:38:44,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:38:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:38:45,046 INFO L87 Difference]: Start difference. First operand has 211 states, 106 states have (on average 2.1320754716981134) internal successors, (226), 195 states have internal predecessors, (226), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:45,162 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2021-11-25 18:38:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:38:45,164 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-25 18:38:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:45,176 INFO L225 Difference]: With dead ends: 211 [2021-11-25 18:38:45,176 INFO L226 Difference]: Without dead ends: 210 [2021-11-25 18:38:45,178 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 [2021-11-25 18:38:45,183 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:45,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-25 18:38:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-11-25 18:38:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 194 states have internal predecessors, (215), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 18:38:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 241 transitions. [2021-11-25 18:38:45,246 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 241 transitions. Word has length 3 [2021-11-25 18:38:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:45,247 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 241 transitions. [2021-11-25 18:38:45,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 241 transitions. [2021-11-25 18:38:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:38:45,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:45,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:38:45,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:38:45,249 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:38:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 442035226, now seen corresponding path program 1 times [2021-11-25 18:38:45,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525754569] [2021-11-25 18:38:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:45,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:45,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:38:45,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879076161] [2021-11-25 18:38:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:45,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:45,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:45,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:45,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:38:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:45,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:38:45,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:45,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:38:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:45,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:45,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:45,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525754569] [2021-11-25 18:38:45,526 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:38:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879076161] [2021-11-25 18:38:45,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879076161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:45,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:45,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:38:45,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035412947] [2021-11-25 18:38:45,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:45,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:38:45,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:38:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:45,542 INFO L87 Difference]: Start difference. First operand 210 states and 241 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:45,806 INFO L93 Difference]: Finished difference Result 209 states and 240 transitions. [2021-11-25 18:38:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:38:45,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2021-11-25 18:38:45,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:45,811 INFO L225 Difference]: With dead ends: 209 [2021-11-25 18:38:45,812 INFO L226 Difference]: Without dead ends: 209 [2021-11-25 18:38:45,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:45,815 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 5 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:45,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 359 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:38:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-25 18:38:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-25 18:38:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 106 states have (on average 2.018867924528302) internal successors, (214), 193 states have internal predecessors, (214), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 18:38:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 240 transitions. [2021-11-25 18:38:45,853 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 240 transitions. Word has length 5 [2021-11-25 18:38:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:45,854 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 240 transitions. [2021-11-25 18:38:45,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 240 transitions. [2021-11-25 18:38:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:38:45,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:45,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:38:45,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:46,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 18:38:46,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:38:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash 818190549, now seen corresponding path program 1 times [2021-11-25 18:38:46,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:46,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478539255] [2021-11-25 18:38:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:46,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:46,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:38:46,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614043908] [2021-11-25 18:38:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:46,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:46,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:46,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:38:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:46,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:38:46,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:46,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:38:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:46,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:46,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:46,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478539255] [2021-11-25 18:38:46,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:38:46,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614043908] [2021-11-25 18:38:46,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614043908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:46,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:46,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:38:46,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740715462] [2021-11-25 18:38:46,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:46,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:38:46,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:38:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:46,388 INFO L87 Difference]: Start difference. First operand 209 states and 240 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:46,440 INFO L93 Difference]: Finished difference Result 208 states and 239 transitions. [2021-11-25 18:38:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:38:46,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:38:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:46,442 INFO L225 Difference]: With dead ends: 208 [2021-11-25 18:38:46,442 INFO L226 Difference]: Without dead ends: 208 [2021-11-25 18:38:46,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:46,444 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:46,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 379 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 73 Unchecked, 0.0s Time] [2021-11-25 18:38:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-25 18:38:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-11-25 18:38:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 106 states have (on average 2.009433962264151) internal successors, (213), 192 states have internal predecessors, (213), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 18:38:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 239 transitions. [2021-11-25 18:38:46,459 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 239 transitions. Word has length 6 [2021-11-25 18:38:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:46,459 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 239 transitions. [2021-11-25 18:38:46,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 239 transitions. [2021-11-25 18:38:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:38:46,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:46,462 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:46,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:46,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:46,687 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:38:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash -637287249, now seen corresponding path program 1 times [2021-11-25 18:38:46,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:46,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618344635] [2021-11-25 18:38:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:46,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:46,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:38:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741115986] [2021-11-25 18:38:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:46,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:46,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:46,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:46,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:38:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:38:46,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:47,246 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:38:47,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:38:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:38:47,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:47,552 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:38:47,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 18:38:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:38:47,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:47,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618344635] [2021-11-25 18:38:47,644 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:38:47,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741115986] [2021-11-25 18:38:47,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741115986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:47,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656437594] [2021-11-25 18:38:47,667 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 18:38:47,667 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:38:47,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:38:47,681 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:38:47,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:38:47,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:38:47,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:38:47,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:38:47,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:38:47,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:38:47,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:38:48,009 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 61 for LOIs [2021-11-25 18:38:48,108 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:38:52,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [656437594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:52,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:38:52,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2021-11-25 18:38:52,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902056600] [2021-11-25 18:38:52,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:52,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:38:52,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:52,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:38:52,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=215, Unknown=1, NotChecked=0, Total=272 [2021-11-25 18:38:52,764 INFO L87 Difference]: Start difference. First operand 208 states and 239 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:38:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:54,043 INFO L93 Difference]: Finished difference Result 214 states and 246 transitions. [2021-11-25 18:38:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:38:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-25 18:38:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:54,049 INFO L225 Difference]: With dead ends: 214 [2021-11-25 18:38:54,049 INFO L226 Difference]: Without dead ends: 214 [2021-11-25 18:38:54,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 112 SyntacticMatches, 15 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=56, Invalid=215, Unknown=1, NotChecked=0, Total=272 [2021-11-25 18:38:54,051 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 2 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:54,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 498 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 18:38:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-25 18:38:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-11-25 18:38:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 197 states have internal predecessors, (218), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 18:38:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 246 transitions. [2021-11-25 18:38:54,063 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 246 transitions. Word has length 48 [2021-11-25 18:38:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:54,064 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 246 transitions. [2021-11-25 18:38:54,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:38:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 246 transitions. [2021-11-25 18:38:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:38:54,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:54,066 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:54,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:54,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:54,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:38:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash -583316456, now seen corresponding path program 1 times [2021-11-25 18:38:54,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:54,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132099624] [2021-11-25 18:38:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:54,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:54,327 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:38:54,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561277549] [2021-11-25 18:38:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:54,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:54,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:54,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:54,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:38:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:54,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:38:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:54,715 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:38:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:38:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-25 18:38:54,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:54,966 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:38:54,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 18:38:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-25 18:38:55,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132099624] [2021-11-25 18:38:55,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:38:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561277549] [2021-11-25 18:38:55,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561277549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106043428] [2021-11-25 18:38:55,064 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 18:38:55,064 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:38:55,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:38:55,065 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:38:55,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:38:55,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:38:55,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:38:55,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:38:55,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:38:55,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:38:55,312 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:38:55,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 183 [2021-11-25 18:38:55,353 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:38:55,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:38:55,387 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:38:55,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 173 [2021-11-25 18:38:55,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:38:55,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:38:55,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:38:55,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:38:55,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:38:55,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:38:55,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:38:57,351 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:38:57,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:38:57,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:38:57,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:38:57,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:38:57,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:38:57,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:38:57,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:38:57,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:38:57,841 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:05,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2531#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:05,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:05,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:39:05,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-11-25 18:39:05,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993649543] [2021-11-25 18:39:05,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:05,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:39:05,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:05,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:39:05,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:39:05,961 INFO L87 Difference]: Start difference. First operand 214 states and 246 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:39:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:06,440 INFO L93 Difference]: Finished difference Result 227 states and 263 transitions. [2021-11-25 18:39:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:39:06,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2021-11-25 18:39:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:06,444 INFO L225 Difference]: With dead ends: 227 [2021-11-25 18:39:06,444 INFO L226 Difference]: Without dead ends: 227 [2021-11-25 18:39:06,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:39:06,448 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 69 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:06,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1219 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 481 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2021-11-25 18:39:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-25 18:39:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2021-11-25 18:39:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 116 states have (on average 1.9310344827586208) internal successors, (224), 200 states have internal predecessors, (224), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-25 18:39:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 253 transitions. [2021-11-25 18:39:06,476 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 253 transitions. Word has length 49 [2021-11-25 18:39:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:06,477 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 253 transitions. [2021-11-25 18:39:06,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:39:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 253 transitions. [2021-11-25 18:39:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:39:06,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:06,481 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:06,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:06,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:06,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:39:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash -583316455, now seen corresponding path program 1 times [2021-11-25 18:39:06,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:06,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525386248] [2021-11-25 18:39:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:06,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:06,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:39:06,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317004663] [2021-11-25 18:39:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:06,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:06,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:06,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:06,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:39:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:39:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:07,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:07,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:39:07,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:39:07,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:39:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-25 18:39:07,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:07,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525386248] [2021-11-25 18:39:07,572 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:39:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317004663] [2021-11-25 18:39:07,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317004663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67971069] [2021-11-25 18:39:07,576 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 18:39:07,576 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:07,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:07,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:07,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:07,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:07,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:07,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:07,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:07,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:39:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:39:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:39:07,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:07,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:07,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:07,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:07,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:07,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:07,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:09,409 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:39:09,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:09,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:09,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:09,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:09,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:09,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:09,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:09,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:09,816 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:14,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3171#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:14,491 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:14,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:39:14,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-25 18:39:14,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762096386] [2021-11-25 18:39:14,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:14,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:39:14,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:39:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:39:14,494 INFO L87 Difference]: Start difference. First operand 219 states and 253 transitions. Second operand has 10 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:39:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:15,670 INFO L93 Difference]: Finished difference Result 310 states and 364 transitions. [2021-11-25 18:39:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:39:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2021-11-25 18:39:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:15,674 INFO L225 Difference]: With dead ends: 310 [2021-11-25 18:39:15,674 INFO L226 Difference]: Without dead ends: 310 [2021-11-25 18:39:15,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:39:15,676 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 103 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 564 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:15,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 483 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 784 Invalid, 0 Unknown, 564 Unchecked, 1.0s Time] [2021-11-25 18:39:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-25 18:39:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 218. [2021-11-25 18:39:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 116 states have (on average 1.9137931034482758) internal successors, (222), 199 states have internal predecessors, (222), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-25 18:39:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2021-11-25 18:39:15,694 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 49 [2021-11-25 18:39:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:15,697 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2021-11-25 18:39:15,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:39:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2021-11-25 18:39:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:39:15,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:15,703 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:15,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:15,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:15,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:39:15,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash -904968937, now seen corresponding path program 2 times [2021-11-25 18:39:15,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:15,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254736508] [2021-11-25 18:39:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:15,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:15,961 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:39:15,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524957473] [2021-11-25 18:39:15,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:39:15,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:15,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:15,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:39:16,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:39:16,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:39:16,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:39:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-25 18:39:16,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:39:16,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254736508] [2021-11-25 18:39:16,649 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:39:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524957473] [2021-11-25 18:39:16,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524957473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158911836] [2021-11-25 18:39:16,653 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 18:39:16,653 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:16,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:16,653 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:16,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:16,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:16,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:16,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:16,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:16,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:39:16,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:16,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:39:16,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:16,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:39:16,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:16,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:16,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:16,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:16,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:17,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:17,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:18,391 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:39:18,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:18,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:18,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:18,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:18,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:18,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:18,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:18,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:18,824 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:23,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4032#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:23,382 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:23,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:39:23,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-25 18:39:23,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794617469] [2021-11-25 18:39:23,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:23,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:39:23,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:23,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:39:23,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:39:23,385 INFO L87 Difference]: Start difference. First operand 218 states and 251 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:39:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:23,856 INFO L93 Difference]: Finished difference Result 226 states and 266 transitions. [2021-11-25 18:39:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:39:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 50 [2021-11-25 18:39:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:23,858 INFO L225 Difference]: With dead ends: 226 [2021-11-25 18:39:23,859 INFO L226 Difference]: Without dead ends: 224 [2021-11-25 18:39:23,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 18:39:23,860 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 30 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:23,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1207 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:39:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-25 18:39:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-11-25 18:39:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 121 states have (on average 1.9008264462809918) internal successors, (230), 206 states have internal predecessors, (230), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-25 18:39:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 263 transitions. [2021-11-25 18:39:23,872 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 263 transitions. Word has length 50 [2021-11-25 18:39:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:23,873 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 263 transitions. [2021-11-25 18:39:23,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:39:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 263 transitions. [2021-11-25 18:39:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 18:39:23,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:23,875 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:23,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:24,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:24,089 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:39:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash -410860017, now seen corresponding path program 3 times [2021-11-25 18:39:24,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:24,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817417574] [2021-11-25 18:39:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:24,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:24,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:39:24,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936525697] [2021-11-25 18:39:24,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:39:24,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:24,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:24,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:24,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:39:24,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:39:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:39:24,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:39:24,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:24,512 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:39:24,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:39:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-25 18:39:24,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:24,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:24,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817417574] [2021-11-25 18:39:24,579 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:39:24,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936525697] [2021-11-25 18:39:24,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936525697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:24,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [925915409] [2021-11-25 18:39:24,585 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 18:39:24,586 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:24,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:24,586 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:24,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:24,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:24,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:24,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:24,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:24,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:24,789 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:39:24,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:39:24,828 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:39:24,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:39:24,863 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:39:24,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 175 [2021-11-25 18:39:24,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:25,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:25,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:25,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:25,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:25,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:26,431 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:39:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:26,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:26,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:26,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:26,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:26,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:26,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:26,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:26,889 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:31,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4693#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:31,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:31,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:39:31,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-25 18:39:31,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731349254] [2021-11-25 18:39:31,824 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:31,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:39:31,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:39:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:39:31,825 INFO L87 Difference]: Start difference. First operand 224 states and 263 transitions. Second operand has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:39:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:32,366 INFO L93 Difference]: Finished difference Result 358 states and 435 transitions. [2021-11-25 18:39:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:39:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2021-11-25 18:39:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:32,370 INFO L225 Difference]: With dead ends: 358 [2021-11-25 18:39:32,370 INFO L226 Difference]: Without dead ends: 358 [2021-11-25 18:39:32,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:39:32,372 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 193 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:32,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1095 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 684 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2021-11-25 18:39:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-25 18:39:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 223. [2021-11-25 18:39:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 121 states have (on average 1.8925619834710743) internal successors, (229), 205 states have internal predecessors, (229), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-25 18:39:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 262 transitions. [2021-11-25 18:39:32,386 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 262 transitions. Word has length 54 [2021-11-25 18:39:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:32,387 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 262 transitions. [2021-11-25 18:39:32,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:39:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 262 transitions. [2021-11-25 18:39:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 18:39:32,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:32,389 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:32,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:32,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 18:39:32,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:39:32,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:32,611 INFO L85 PathProgramCache]: Analyzing trace with hash 148254513, now seen corresponding path program 1 times [2021-11-25 18:39:32,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:32,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824519370] [2021-11-25 18:39:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:32,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:32,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:39:32,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61440397] [2021-11-25 18:39:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:32,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:32,661 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:32,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:39:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:32,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 18:39:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:33,030 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:39:33,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:39:33,147 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:39:33,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:39:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-25 18:39:33,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:33,579 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:39:33,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 18:39:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-25 18:39:33,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824519370] [2021-11-25 18:39:33,627 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:39:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61440397] [2021-11-25 18:39:33,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61440397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975979514] [2021-11-25 18:39:33,630 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:39:33,630 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:33,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:33,631 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:33,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:33,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:33,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:33,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:33,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:33,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:33,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:33,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:39:33,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:33,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:39:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:33,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:39:33,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:33,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:33,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:33,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:33,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:33,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:34,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:34,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:39:35,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:35,141 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:39:35,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:35,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:35,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:35,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:35,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:35,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:35,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:35,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:35,502 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:42,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(and (not (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:42,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:42,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:39:42,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-11-25 18:39:42,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702035258] [2021-11-25 18:39:42,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:42,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:39:42,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:39:42,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 18:39:42,256 INFO L87 Difference]: Start difference. First operand 223 states and 262 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:39:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:42,869 INFO L93 Difference]: Finished difference Result 252 states and 302 transitions. [2021-11-25 18:39:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:39:42,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2021-11-25 18:39:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:42,872 INFO L225 Difference]: With dead ends: 252 [2021-11-25 18:39:42,873 INFO L226 Difference]: Without dead ends: 252 [2021-11-25 18:39:42,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 15 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 18:39:42,874 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 114 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:42,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1452 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 569 Invalid, 0 Unknown, 374 Unchecked, 0.4s Time] [2021-11-25 18:39:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-25 18:39:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 244. [2021-11-25 18:39:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 139 states have (on average 1.8129496402877698) internal successors, (252), 222 states have internal predecessors, (252), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2021-11-25 18:39:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 289 transitions. [2021-11-25 18:39:42,889 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 289 transitions. Word has length 55 [2021-11-25 18:39:42,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:42,890 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 289 transitions. [2021-11-25 18:39:42,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:39:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 289 transitions. [2021-11-25 18:39:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 18:39:42,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:42,892 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:42,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:43,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:43,111 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:39:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:43,112 INFO L85 PathProgramCache]: Analyzing trace with hash 148254514, now seen corresponding path program 1 times [2021-11-25 18:39:43,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:43,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303423061] [2021-11-25 18:39:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:43,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:43,137 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:39:43,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730595348] [2021-11-25 18:39:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:43,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:43,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:43,139 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:43,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:39:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-25 18:39:43,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:51,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:51,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:39:51,741 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:39:51,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:39:55,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:55,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:39:55,867 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:39:55,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:39:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 51 proven. 58 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 18:39:58,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:58,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:58,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303423061] [2021-11-25 18:39:58,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:39:58,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730595348] [2021-11-25 18:39:58,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730595348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:58,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149262419] [2021-11-25 18:39:58,623 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:39:58,623 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:58,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:58,624 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:58,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:58,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:58,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:39:58,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:58,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:58,836 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:39:58,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 183 [2021-11-25 18:39:58,905 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:39:58,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:39:59,018 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:39:59,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 173 [2021-11-25 18:39:59,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:59,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:39:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:39:59,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:59,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:59,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:39:59,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:00,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:00,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:00,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:00,539 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:40:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:00,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:00,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:00,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:00,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:00,898 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:11,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6366#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (< (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:40:11,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:11,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:40:11,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-25 18:40:11,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302357231] [2021-11-25 18:40:11,423 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:11,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:40:11,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:40:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:40:11,425 INFO L87 Difference]: Start difference. First operand 244 states and 289 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:40:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:12,516 INFO L93 Difference]: Finished difference Result 356 states and 440 transitions. [2021-11-25 18:40:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:40:12,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2021-11-25 18:40:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:12,521 INFO L225 Difference]: With dead ends: 356 [2021-11-25 18:40:12,521 INFO L226 Difference]: Without dead ends: 356 [2021-11-25 18:40:12,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=235, Invalid=2627, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 18:40:12,523 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 102 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1687 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:12,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1041 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 597 Invalid, 0 Unknown, 1687 Unchecked, 0.6s Time] [2021-11-25 18:40:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-25 18:40:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 254. [2021-11-25 18:40:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 145 states have (on average 1.7862068965517242) internal successors, (259), 229 states have internal predecessors, (259), 18 states have call successors, (18), 6 states have call predecessors, (18), 8 states have return successors, (27), 18 states have call predecessors, (27), 18 states have call successors, (27) [2021-11-25 18:40:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2021-11-25 18:40:12,542 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 55 [2021-11-25 18:40:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:12,543 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2021-11-25 18:40:12,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:40:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2021-11-25 18:40:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 18:40:12,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:12,550 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:12,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:12,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:12,763 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:40:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash 237660513, now seen corresponding path program 2 times [2021-11-25 18:40:12,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:12,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198146185] [2021-11-25 18:40:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:12,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:12,797 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:40:12,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641851106] [2021-11-25 18:40:12,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:40:12,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:12,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:12,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:40:13,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:40:13,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:40:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:40:13,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:13,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:13,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:14,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:14,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:40:14,075 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:40:14,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:40:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-25 18:40:14,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:14,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:14,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198146185] [2021-11-25 18:40:14,219 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:40:14,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641851106] [2021-11-25 18:40:14,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641851106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:14,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955750483] [2021-11-25 18:40:14,222 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:40:14,222 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:14,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:14,222 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:14,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:14,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:14,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:14,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:14,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:14,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:14,465 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:40:14,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:40:14,535 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:40:14,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:40:14,614 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:40:14,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 175 [2021-11-25 18:40:14,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:14,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:14,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:14,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:14,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:14,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:15,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:15,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:15,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:15,916 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:40:15,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:15,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:16,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:16,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:16,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:16,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:16,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:16,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:16,294 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:22,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7198#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (< (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:40:22,218 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:22,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:40:22,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-25 18:40:22,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733096933] [2021-11-25 18:40:22,219 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:22,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:40:22,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:40:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 18:40:22,221 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:40:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:23,255 INFO L93 Difference]: Finished difference Result 351 states and 422 transitions. [2021-11-25 18:40:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:40:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2021-11-25 18:40:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:23,259 INFO L225 Difference]: With dead ends: 351 [2021-11-25 18:40:23,259 INFO L226 Difference]: Without dead ends: 341 [2021-11-25 18:40:23,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:40:23,260 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 101 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:23,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 456 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 980 Invalid, 0 Unknown, 380 Unchecked, 0.9s Time] [2021-11-25 18:40:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-25 18:40:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 244. [2021-11-25 18:40:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 139 states have (on average 1.8057553956834533) internal successors, (251), 222 states have internal predecessors, (251), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2021-11-25 18:40:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 287 transitions. [2021-11-25 18:40:23,275 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 287 transitions. Word has length 56 [2021-11-25 18:40:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:23,276 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 287 transitions. [2021-11-25 18:40:23,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:40:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 287 transitions. [2021-11-25 18:40:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 18:40:23,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:23,277 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:23,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:23,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 18:40:23,483 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:40:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash 688342290, now seen corresponding path program 3 times [2021-11-25 18:40:23,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:23,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931506187] [2021-11-25 18:40:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:23,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:23,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:40:23,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147047224] [2021-11-25 18:40:23,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:40:23,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:23,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:23,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:23,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:40:23,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:40:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:40:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-25 18:40:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:24,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:24,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:24,632 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:40:24,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:40:24,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:40:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:40:24,822 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:40:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:40:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 32 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 18:40:24,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:25,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:25,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931506187] [2021-11-25 18:40:25,026 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:40:25,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147047224] [2021-11-25 18:40:25,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147047224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:25,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331105870] [2021-11-25 18:40:25,029 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:40:25,029 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:25,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:25,030 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:25,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:25,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:25,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:25,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:25,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:25,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:40:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:25,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:40:25,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:25,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:40:25,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:25,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:25,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:25,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:25,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:26,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:26,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:26,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:26,486 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:40:26,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:26,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:26,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:26,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:26,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:26,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:26,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:26,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:26,890 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:32,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8013#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (< (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:40:32,959 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:32,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:40:32,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-25 18:40:32,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117348128] [2021-11-25 18:40:32,960 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:32,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:40:32,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:32,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:40:32,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:40:32,962 INFO L87 Difference]: Start difference. First operand 244 states and 287 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:40:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:34,210 INFO L93 Difference]: Finished difference Result 336 states and 399 transitions. [2021-11-25 18:40:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:40:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2021-11-25 18:40:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:34,214 INFO L225 Difference]: With dead ends: 336 [2021-11-25 18:40:34,214 INFO L226 Difference]: Without dead ends: 336 [2021-11-25 18:40:34,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 18:40:34,216 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 103 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1244 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:34,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 715 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 1244 Unchecked, 1.0s Time] [2021-11-25 18:40:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-25 18:40:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 244. [2021-11-25 18:40:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 139 states have (on average 1.7985611510791366) internal successors, (250), 222 states have internal predecessors, (250), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2021-11-25 18:40:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 286 transitions. [2021-11-25 18:40:34,233 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 286 transitions. Word has length 57 [2021-11-25 18:40:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:34,234 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 286 transitions. [2021-11-25 18:40:34,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:40:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 286 transitions. [2021-11-25 18:40:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 18:40:34,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:34,236 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:34,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:34,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:40:34,443 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:40:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash -136225509, now seen corresponding path program 1 times [2021-11-25 18:40:34,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:34,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592461132] [2021-11-25 18:40:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:34,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:34,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:40:34,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661136025] [2021-11-25 18:40:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:34,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:34,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:34,496 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:34,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:40:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:34,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:40:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-25 18:40:34,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:34,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 18:40:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-25 18:40:34,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:34,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592461132] [2021-11-25 18:40:34,967 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:40:34,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661136025] [2021-11-25 18:40:34,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661136025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:34,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1289131533] [2021-11-25 18:40:34,969 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 18:40:34,969 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:34,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:34,970 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:34,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:35,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:35,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:35,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:35,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:35,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:35,214 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:40:35,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:40:35,280 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:40:35,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 179 [2021-11-25 18:40:35,340 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:40:35,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 173 [2021-11-25 18:40:35,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:35,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:35,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:35,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:35,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:35,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:36,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:36,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:36,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:36,639 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:40:36,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:36,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:36,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:36,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:36,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:37,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:37,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:37,058 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:42,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1289131533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:42,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:40:42,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [6, 6] total 30 [2021-11-25 18:40:42,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551308515] [2021-11-25 18:40:42,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:42,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:40:42,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:40:42,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:40:42,536 INFO L87 Difference]: Start difference. First operand 244 states and 286 transitions. Second operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:40:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:45,892 INFO L93 Difference]: Finished difference Result 389 states and 456 transitions. [2021-11-25 18:40:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:40:45,893 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2021-11-25 18:40:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:45,897 INFO L225 Difference]: With dead ends: 389 [2021-11-25 18:40:45,897 INFO L226 Difference]: Without dead ends: 389 [2021-11-25 18:40:45,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:40:45,899 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 346 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:45,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1685 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 18:40:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-25 18:40:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 314. [2021-11-25 18:40:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 197 states have (on average 1.736040609137056) internal successors, (342), 280 states have internal predecessors, (342), 23 states have call successors, (23), 10 states have call predecessors, (23), 11 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2021-11-25 18:40:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 395 transitions. [2021-11-25 18:40:45,915 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 395 transitions. Word has length 58 [2021-11-25 18:40:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:45,916 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 395 transitions. [2021-11-25 18:40:45,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:40:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 395 transitions. [2021-11-25 18:40:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 18:40:45,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:45,918 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:45,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-25 18:40:46,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:46,131 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:40:46,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:46,132 INFO L85 PathProgramCache]: Analyzing trace with hash 71989305, now seen corresponding path program 1 times [2021-11-25 18:40:46,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:46,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541944493] [2021-11-25 18:40:46,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:46,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:46,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:40:46,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282691675] [2021-11-25 18:40:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:46,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:46,157 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:46,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:40:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:40:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-25 18:40:46,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:40:46,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:46,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541944493] [2021-11-25 18:40:46,503 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:40:46,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282691675] [2021-11-25 18:40:46,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282691675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:46,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:46,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:40:46,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271858381] [2021-11-25 18:40:46,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:46,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:46,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:46,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:46,506 INFO L87 Difference]: Start difference. First operand 314 states and 395 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:40:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:46,728 INFO L93 Difference]: Finished difference Result 325 states and 417 transitions. [2021-11-25 18:40:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 59 [2021-11-25 18:40:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:46,732 INFO L225 Difference]: With dead ends: 325 [2021-11-25 18:40:46,732 INFO L226 Difference]: Without dead ends: 325 [2021-11-25 18:40:46,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:46,733 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 84 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:46,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 302 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:40:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-25 18:40:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 313. [2021-11-25 18:40:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 197 states have (on average 1.7258883248730965) internal successors, (340), 279 states have internal predecessors, (340), 23 states have call successors, (23), 10 states have call predecessors, (23), 11 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2021-11-25 18:40:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 393 transitions. [2021-11-25 18:40:46,760 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 393 transitions. Word has length 59 [2021-11-25 18:40:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:46,761 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 393 transitions. [2021-11-25 18:40:46,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:40:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 393 transitions. [2021-11-25 18:40:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:40:46,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:46,763 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:46,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:46,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:40:46,980 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:40:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash 462651685, now seen corresponding path program 1 times [2021-11-25 18:40:46,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:46,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365123692] [2021-11-25 18:40:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:46,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:47,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:40:47,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078652448] [2021-11-25 18:40:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:47,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:47,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:47,011 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:47,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:40:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 18:40:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:47,464 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:40:47,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:40:47,656 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:47,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-25 18:40:47,836 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-25 18:40:47,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 77 proven. 46 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 18:40:47,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:48,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365123692] [2021-11-25 18:40:48,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:40:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078652448] [2021-11-25 18:40:48,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078652448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1067434554] [2021-11-25 18:40:48,168 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-25 18:40:48,168 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:48,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:48,169 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:48,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:48,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:48,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:48,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:48,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:40:48,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:40:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:40:48,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:48,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:48,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:48,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:48,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:48,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:48,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:40:49,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:49,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:49,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:49,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:49,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:49,494 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:40:49,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:40:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:49,538 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:40:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:40:49,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:49,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:49,675 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:40:49,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:40:49,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:49,722 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:40:49,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:40:49,865 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:40:49,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:40:49,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:50,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:50,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:50,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:50,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:40:50,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:40:50,336 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:02,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10774#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:41:02,763 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:02,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:41:02,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-25 18:41:02,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953304428] [2021-11-25 18:41:02,763 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:02,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:41:02,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:41:02,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 18:41:02,765 INFO L87 Difference]: Start difference. First operand 313 states and 393 transitions. Second operand has 20 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:41:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:03,253 INFO L93 Difference]: Finished difference Result 476 states and 604 transitions. [2021-11-25 18:41:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:41:03,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 61 [2021-11-25 18:41:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:03,261 INFO L225 Difference]: With dead ends: 476 [2021-11-25 18:41:03,261 INFO L226 Difference]: Without dead ends: 476 [2021-11-25 18:41:03,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=284, Invalid=2368, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 18:41:03,266 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 168 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 640 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:03,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 2079 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 572 Invalid, 0 Unknown, 640 Unchecked, 0.4s Time] [2021-11-25 18:41:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-25 18:41:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 339. [2021-11-25 18:41:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 217 states have (on average 1.6820276497695852) internal successors, (365), 299 states have internal predecessors, (365), 29 states have call successors, (29), 10 states have call predecessors, (29), 11 states have return successors, (38), 29 states have call predecessors, (38), 29 states have call successors, (38) [2021-11-25 18:41:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 432 transitions. [2021-11-25 18:41:03,289 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 432 transitions. Word has length 61 [2021-11-25 18:41:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:03,290 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 432 transitions. [2021-11-25 18:41:03,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:41:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 432 transitions. [2021-11-25 18:41:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:41:03,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:03,292 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:03,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:41:03,519 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:41:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 462651686, now seen corresponding path program 1 times [2021-11-25 18:41:03,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:03,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681976310] [2021-11-25 18:41:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:03,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:03,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:41:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267491543] [2021-11-25 18:41:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:03,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:03,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:03,540 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:03,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:41:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-25 18:41:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:04,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:41:04,798 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:41:04,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:41:04,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:41:05,248 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:41:05,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-25 18:41:05,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:41:05,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:05,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:41:05,672 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-25 18:41:05,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:41:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 73 proven. 44 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:41:05,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:06,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681976310] [2021-11-25 18:41:06,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:41:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267491543] [2021-11-25 18:41:06,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267491543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745741835] [2021-11-25 18:41:06,004 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-25 18:41:06,004 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:06,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:06,005 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:06,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:06,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:06,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:41:06,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:06,176 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:41:06,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:41:06,237 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:41:06,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:41:06,297 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:41:06,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 175 [2021-11-25 18:41:06,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:06,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:06,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:06,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:06,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:06,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:06,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:07,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:07,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:07,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:07,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:07,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:07,532 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:41:07,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:41:07,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:07,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:07,563 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:41:07,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:41:07,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:07,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:07,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:07,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:07,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:07,693 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:41:07,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:41:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:07,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:07,739 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:41:07,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:41:07,886 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:41:07,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:41:07,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:08,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:08,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:08,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:08,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:08,249 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:17,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11842#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (< (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|) (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4)) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:41:17,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:17,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:41:17,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-25 18:41:17,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712392496] [2021-11-25 18:41:17,849 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:17,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:41:17,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:41:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:41:17,851 INFO L87 Difference]: Start difference. First operand 339 states and 432 transitions. Second operand has 19 states, 13 states have (on average 2.769230769230769) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:41:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:19,728 INFO L93 Difference]: Finished difference Result 433 states and 545 transitions. [2021-11-25 18:41:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:41:19,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 2.769230769230769) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-11-25 18:41:19,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:19,732 INFO L225 Difference]: With dead ends: 433 [2021-11-25 18:41:19,732 INFO L226 Difference]: Without dead ends: 433 [2021-11-25 18:41:19,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:41:19,734 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 103 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1305 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:19,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 808 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 758 Invalid, 0 Unknown, 1305 Unchecked, 1.5s Time] [2021-11-25 18:41:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-25 18:41:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 339. [2021-11-25 18:41:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 217 states have (on average 1.672811059907834) internal successors, (363), 299 states have internal predecessors, (363), 29 states have call successors, (29), 10 states have call predecessors, (29), 11 states have return successors, (38), 29 states have call predecessors, (38), 29 states have call successors, (38) [2021-11-25 18:41:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 430 transitions. [2021-11-25 18:41:19,753 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 430 transitions. Word has length 61 [2021-11-25 18:41:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:19,753 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 430 transitions. [2021-11-25 18:41:19,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 2.769230769230769) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:41:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 430 transitions. [2021-11-25 18:41:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 18:41:19,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:19,755 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:19,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:19,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:19,983 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:41:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:19,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1457300380, now seen corresponding path program 1 times [2021-11-25 18:41:19,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:19,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95916309] [2021-11-25 18:41:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:19,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:20,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:41:20,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137689718] [2021-11-25 18:41:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:20,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:20,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:20,007 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:20,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:41:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 18:41:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-25 18:41:20,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:41:20,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:20,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95916309] [2021-11-25 18:41:20,396 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:41:20,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137689718] [2021-11-25 18:41:20,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137689718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:20,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:20,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:41:20,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678114120] [2021-11-25 18:41:20,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:20,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:41:20,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:20,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:41:20,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:41:20,399 INFO L87 Difference]: Start difference. First operand 339 states and 430 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:41:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:20,599 INFO L93 Difference]: Finished difference Result 351 states and 451 transitions. [2021-11-25 18:41:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:41:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2021-11-25 18:41:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:20,601 INFO L225 Difference]: With dead ends: 351 [2021-11-25 18:41:20,601 INFO L226 Difference]: Without dead ends: 351 [2021-11-25 18:41:20,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:41:20,602 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 141 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:20,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 453 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:41:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-25 18:41:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 338. [2021-11-25 18:41:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 217 states have (on average 1.663594470046083) internal successors, (361), 298 states have internal predecessors, (361), 29 states have call successors, (29), 10 states have call predecessors, (29), 11 states have return successors, (38), 29 states have call predecessors, (38), 29 states have call successors, (38) [2021-11-25 18:41:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 428 transitions. [2021-11-25 18:41:20,618 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 428 transitions. Word has length 62 [2021-11-25 18:41:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:20,618 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 428 transitions. [2021-11-25 18:41:20,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:41:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 428 transitions. [2021-11-25 18:41:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 18:41:20,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:20,620 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:20,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:20,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:41:20,831 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:41:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1457300381, now seen corresponding path program 1 times [2021-11-25 18:41:20,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461466007] [2021-11-25 18:41:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:20,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:20,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:41:20,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562146885] [2021-11-25 18:41:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:20,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:20,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:20,849 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:20,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:41:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:21,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-25 18:41:21,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:21,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:21,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 18:41:23,620 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:41:23,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-11-25 18:41:25,471 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:41:25,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:41:26,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:26,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-25 18:41:26,757 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:41:26,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:41:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 55 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:41:29,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:29,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461466007] [2021-11-25 18:41:29,591 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:41:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562146885] [2021-11-25 18:41:29,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562146885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1265938891] [2021-11-25 18:41:29,594 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-25 18:41:29,594 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:29,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:29,595 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:29,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:29,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:29,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:41:29,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:29,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:29,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:29,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:29,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:41:29,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:29,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:41:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:29,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:41:29,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:29,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:29,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:29,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:30,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:30,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:30,902 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:41:30,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:41:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:30,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:30,954 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:41:30,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:41:31,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:31,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:31,038 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:41:31,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:41:31,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:31,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:31,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:31,075 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:41:31,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:41:31,250 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:41:31,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:41:31,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:31,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:31,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:31,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:31,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:31,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:31,639 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:45,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13762#(and (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (<= (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (< (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_#t~mem11#1.base|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_#t~mem11#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:41:45,843 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:45,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:41:45,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-25 18:41:45,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640169490] [2021-11-25 18:41:45,844 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:45,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 18:41:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:45,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 18:41:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2906, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 18:41:45,846 INFO L87 Difference]: Start difference. First operand 338 states and 428 transitions. Second operand has 26 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:41:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:47,557 INFO L93 Difference]: Finished difference Result 495 states and 639 transitions. [2021-11-25 18:41:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:41:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 62 [2021-11-25 18:41:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:47,561 INFO L225 Difference]: With dead ends: 495 [2021-11-25 18:41:47,561 INFO L226 Difference]: Without dead ends: 495 [2021-11-25 18:41:47,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 18:41:47,564 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 103 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1786 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:47,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1426 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 578 Invalid, 0 Unknown, 1786 Unchecked, 0.6s Time] [2021-11-25 18:41:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-25 18:41:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 384. [2021-11-25 18:41:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 255 states have (on average 1.603921568627451) internal successors, (409), 332 states have internal predecessors, (409), 37 states have call successors, (37), 10 states have call predecessors, (37), 11 states have return successors, (46), 41 states have call predecessors, (46), 37 states have call successors, (46) [2021-11-25 18:41:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 492 transitions. [2021-11-25 18:41:47,584 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 492 transitions. Word has length 62 [2021-11-25 18:41:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:47,585 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 492 transitions. [2021-11-25 18:41:47,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:41:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 492 transitions. [2021-11-25 18:41:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 18:41:47,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:47,587 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:47,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:47,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:41:47,815 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:41:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2068316473, now seen corresponding path program 1 times [2021-11-25 18:41:47,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:47,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507941416] [2021-11-25 18:41:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:47,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:47,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:41:47,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220164606] [2021-11-25 18:41:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:47,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:47,836 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:47,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:41:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:41:48,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-25 18:41:48,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:41:48,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:48,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507941416] [2021-11-25 18:41:48,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:41:48,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220164606] [2021-11-25 18:41:48,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220164606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:48,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:48,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:41:48,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515086058] [2021-11-25 18:41:48,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:48,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:48,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:48,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:48,173 INFO L87 Difference]: Start difference. First operand 384 states and 492 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:41:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:48,323 INFO L93 Difference]: Finished difference Result 391 states and 506 transitions. [2021-11-25 18:41:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2021-11-25 18:41:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:48,328 INFO L225 Difference]: With dead ends: 391 [2021-11-25 18:41:48,328 INFO L226 Difference]: Without dead ends: 391 [2021-11-25 18:41:48,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:48,330 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 44 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:48,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 331 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:41:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-25 18:41:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 383. [2021-11-25 18:41:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 255 states have (on average 1.5960784313725491) internal successors, (407), 331 states have internal predecessors, (407), 37 states have call successors, (37), 10 states have call predecessors, (37), 11 states have return successors, (46), 41 states have call predecessors, (46), 37 states have call successors, (46) [2021-11-25 18:41:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 490 transitions. [2021-11-25 18:41:48,347 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 490 transitions. Word has length 63 [2021-11-25 18:41:48,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:48,348 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 490 transitions. [2021-11-25 18:41:48,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:41:48,348 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 490 transitions. [2021-11-25 18:41:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 18:41:48,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:48,350 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:48,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:48,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:48,567 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:41:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2068316472, now seen corresponding path program 1 times [2021-11-25 18:41:48,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:48,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821411183] [2021-11-25 18:41:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:48,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:48,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:41:48,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738737118] [2021-11-25 18:41:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:48,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:48,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:48,587 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:48,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 18:41:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:48,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:41:48,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-25 18:41:48,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:41:48,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821411183] [2021-11-25 18:41:48,928 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:41:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738737118] [2021-11-25 18:41:48,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738737118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:48,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:48,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:41:48,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137662910] [2021-11-25 18:41:48,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:48,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:48,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:48,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:48,930 INFO L87 Difference]: Start difference. First operand 383 states and 490 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:41:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:49,238 INFO L93 Difference]: Finished difference Result 390 states and 504 transitions. [2021-11-25 18:41:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2021-11-25 18:41:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:49,243 INFO L225 Difference]: With dead ends: 390 [2021-11-25 18:41:49,243 INFO L226 Difference]: Without dead ends: 390 [2021-11-25 18:41:49,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:49,244 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 72 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:49,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 303 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:41:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-25 18:41:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 382. [2021-11-25 18:41:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 255 states have (on average 1.588235294117647) internal successors, (405), 330 states have internal predecessors, (405), 37 states have call successors, (37), 10 states have call predecessors, (37), 11 states have return successors, (46), 41 states have call predecessors, (46), 37 states have call successors, (46) [2021-11-25 18:41:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 488 transitions. [2021-11-25 18:41:49,263 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 488 transitions. Word has length 63 [2021-11-25 18:41:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:49,263 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 488 transitions. [2021-11-25 18:41:49,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:41:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 488 transitions. [2021-11-25 18:41:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 18:41:49,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:49,265 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:49,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:49,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:49,487 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:41:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:49,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1307079811, now seen corresponding path program 2 times [2021-11-25 18:41:49,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:49,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115296366] [2021-11-25 18:41:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:49,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:49,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:41:49,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046061142] [2021-11-25 18:41:49,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:41:49,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:49,512 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:49,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:41:50,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:41:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:41:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:41:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 111 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-25 18:41:50,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-25 18:41:51,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:51,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115296366] [2021-11-25 18:41:51,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:41:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046061142] [2021-11-25 18:41:51,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046061142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:41:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891114117] [2021-11-25 18:41:51,387 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-25 18:41:51,388 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:51,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:51,389 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:51,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:51,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:41:51,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:51,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:51,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:51,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:51,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:51,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:41:51,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:51,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:41:51,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:51,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:41:51,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:51,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:51,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:51,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:51,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:51,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:51,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:41:52,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:52,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:52,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:52,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:52,698 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:41:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:41:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:52,738 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:41:52,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:41:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:52,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:52,819 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:41:52,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:41:52,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:52,876 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:41:52,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:41:53,047 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:41:53,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:41:53,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:53,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:53,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:53,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:41:53,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:41:53,411 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:02,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16999#(and (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (<= (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (< (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_#t~mem11#1.base|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_#t~mem11#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:42:02,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:42:02,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:42:02,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-25 18:42:02,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567374163] [2021-11-25 18:42:02,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:02,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:42:02,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:42:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 18:42:02,504 INFO L87 Difference]: Start difference. First operand 382 states and 488 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:42:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:03,253 INFO L93 Difference]: Finished difference Result 360 states and 447 transitions. [2021-11-25 18:42:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:42:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 64 [2021-11-25 18:42:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:03,258 INFO L225 Difference]: With dead ends: 360 [2021-11-25 18:42:03,258 INFO L226 Difference]: Without dead ends: 350 [2021-11-25 18:42:03,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=361, Invalid=1991, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 18:42:03,261 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 24 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:03,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1362 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:42:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-25 18:42:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 346. [2021-11-25 18:42:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 229 states have (on average 1.5676855895196506) internal successors, (359), 307 states have internal predecessors, (359), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-25 18:42:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 417 transitions. [2021-11-25 18:42:03,284 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 417 transitions. Word has length 64 [2021-11-25 18:42:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:03,285 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 417 transitions. [2021-11-25 18:42:03,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:42:03,285 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 417 transitions. [2021-11-25 18:42:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 18:42:03,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:03,286 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:03,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:03,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:03,505 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:42:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2063149245, now seen corresponding path program 3 times [2021-11-25 18:42:03,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:03,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892771248] [2021-11-25 18:42:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:03,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:03,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:42:03,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108685226] [2021-11-25 18:42:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:42:03,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:03,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:03,551 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:03,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 18:42:04,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:42:04,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:42:04,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-25 18:42:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:04,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:42:05,463 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:42:05,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:42:05,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:42:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:42:05,726 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:42:05,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:42:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 434 proven. 128 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-25 18:42:05,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:06,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892771248] [2021-11-25 18:42:06,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:42:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108685226] [2021-11-25 18:42:06,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108685226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789739508] [2021-11-25 18:42:06,075 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-25 18:42:06,075 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:06,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:42:06,076 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:42:06,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:42:06,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:42:06,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:06,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:42:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:06,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:42:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:42:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:42:06,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:06,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:42:06,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:06,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:06,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:06,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:07,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:42:07,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:07,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,326 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:42:07,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:42:07,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,357 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:42:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:42:07,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:42:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,452 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:42:07,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:42:07,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,493 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:42:07,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:42:07,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:42:07,677 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:42:07,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:42:07,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:07,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:07,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:07,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:42:08,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:42:08,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:08,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:08,087 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:18,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18056#(and (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (<= (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (< (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_#t~mem11#1.base|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_#t~mem11#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:42:18,590 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:42:18,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:42:18,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-25 18:42:18,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356274486] [2021-11-25 18:42:18,591 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:18,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:42:18,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:42:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:42:18,594 INFO L87 Difference]: Start difference. First operand 346 states and 417 transitions. Second operand has 17 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:42:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:20,528 INFO L93 Difference]: Finished difference Result 585 states and 731 transitions. [2021-11-25 18:42:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:42:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 88 [2021-11-25 18:42:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:20,535 INFO L225 Difference]: With dead ends: 585 [2021-11-25 18:42:20,535 INFO L226 Difference]: Without dead ends: 585 [2021-11-25 18:42:20,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 18:42:20,538 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 374 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1222 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:20,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 593 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1362 Invalid, 0 Unknown, 1222 Unchecked, 1.6s Time] [2021-11-25 18:42:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-25 18:42:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 356. [2021-11-25 18:42:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 239 states have (on average 1.5732217573221758) internal successors, (376), 317 states have internal predecessors, (376), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-25 18:42:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 434 transitions. [2021-11-25 18:42:20,559 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 434 transitions. Word has length 88 [2021-11-25 18:42:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:20,560 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 434 transitions. [2021-11-25 18:42:20,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:42:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 434 transitions. [2021-11-25 18:42:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 18:42:20,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:20,562 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:20,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:20,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-25 18:42:20,787 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:42:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1985924291, now seen corresponding path program 1 times [2021-11-25 18:42:20,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:20,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711315809] [2021-11-25 18:42:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:20,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:20,820 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:42:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990421784] [2021-11-25 18:42:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:20,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:20,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:20,827 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:20,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 18:42:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 18:42:21,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:21,421 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:42:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:42:21,537 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:42:21,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:42:21,646 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:21,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:42:21,834 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:21,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-25 18:42:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 254 proven. 412 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-25 18:42:21,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:22,687 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711315809] [2021-11-25 18:42:22,687 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:42:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990421784] [2021-11-25 18:42:22,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990421784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095217860] [2021-11-25 18:42:22,689 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-25 18:42:22,689 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:22,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:42:22,690 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:42:22,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:42:22,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:22,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:42:22,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:42:22,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:22,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:42:22,941 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:42:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:42:23,009 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:42:23,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:42:23,072 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:42:23,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 175 [2021-11-25 18:42:23,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:23,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:23,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:42:23,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:23,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:23,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:24,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:24,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:42:24,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:24,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,268 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:42:24,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:42:24,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:42:24,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,321 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:42:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:42:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:42:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,397 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:42:24,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:42:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,442 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:42:24,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:42:24,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,577 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:42:24,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:42:24,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,644 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:42:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:42:24,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:42:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,804 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:42:24,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 79 treesize of output 82 [2021-11-25 18:42:24,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:24,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:24,952 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:42:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 59 treesize of output 58 [2021-11-25 18:42:24,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:42:25,144 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:42:25,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:42:25,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:25,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:25,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:42:25,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:25,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:25,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:42:25,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:25,536 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:48,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19439#(and (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (or (= |ULTIMATE.start_l4_insert_~item~0#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (and (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (and (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_~item~0#1.base|)))) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (not (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)) 0)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_~item~1#1.base|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (or (= |ULTIMATE.start_l4_insert_~item~0#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:42:48,437 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:42:48,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:42:48,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-25 18:42:48,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683516830] [2021-11-25 18:42:48,437 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:48,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:42:48,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:48,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:42:48,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2658, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 18:42:48,440 INFO L87 Difference]: Start difference. First operand 356 states and 434 transitions. Second operand has 17 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:42:49,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:49,033 INFO L93 Difference]: Finished difference Result 534 states and 651 transitions. [2021-11-25 18:42:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:42:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 91 [2021-11-25 18:42:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:49,037 INFO L225 Difference]: With dead ends: 534 [2021-11-25 18:42:49,037 INFO L226 Difference]: Without dead ends: 534 [2021-11-25 18:42:49,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 149 SyntacticMatches, 18 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=361, Invalid=3179, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 18:42:49,040 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 150 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 476 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:49,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1784 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 647 Invalid, 0 Unknown, 476 Unchecked, 0.4s Time] [2021-11-25 18:42:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-25 18:42:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 523. [2021-11-25 18:42:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 381 states have (on average 1.4461942257217848) internal successors, (551), 458 states have internal predecessors, (551), 47 states have call successors, (47), 17 states have call predecessors, (47), 17 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-25 18:42:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 645 transitions. [2021-11-25 18:42:49,060 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 645 transitions. Word has length 91 [2021-11-25 18:42:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:49,061 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 645 transitions. [2021-11-25 18:42:49,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:42:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 645 transitions. [2021-11-25 18:42:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 18:42:49,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:49,062 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:49,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:49,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 18:42:49,279 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:42:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1985924290, now seen corresponding path program 1 times [2021-11-25 18:42:49,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:49,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407530084] [2021-11-25 18:42:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:49,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:49,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:42:49,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142673884] [2021-11-25 18:42:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:49,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:49,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:49,323 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:49,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 18:42:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:54,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-25 18:42:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:54,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:54,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:42:54,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:42:55,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:55,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:42:55,840 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:42:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:42:56,265 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:56,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:42:56,395 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:42:56,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:42:57,051 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:57,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:42:57,232 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:42:57,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-25 18:42:57,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:57,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:42:57,874 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-25 18:42:57,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:42:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 358 proven. 314 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-25 18:42:58,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:58,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:58,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407530084] [2021-11-25 18:42:58,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:42:58,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142673884] [2021-11-25 18:42:58,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142673884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:58,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476259567] [2021-11-25 18:42:58,544 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-25 18:42:58,544 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:58,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:42:58,545 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:42:58,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:42:58,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:42:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:42:58,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:42:58,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:58,749 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:42:58,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:42:58,873 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:42:58,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 179 [2021-11-25 18:42:58,971 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:42:58,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 173 [2021-11-25 18:42:59,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:59,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:42:59,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:42:59,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:59,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:59,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:59,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:42:59,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:43:00,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:43:00,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:43:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,133 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:43:00,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:43:00,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,202 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:43:00,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:43:00,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,270 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:43:00,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:43:00,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,314 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:43:00,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:43:00,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,476 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:43:00,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:43:00,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,550 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:43:00,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:43:00,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:43:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,671 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:43:00,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 58 [2021-11-25 18:43:00,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:00,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:00,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:00,772 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:43:00,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 18:43:01,093 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:43:01,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:43:01,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:43:01,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:01,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:01,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:01,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:01,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:01,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:01,487 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:43:15,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20865#(and (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (< (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|) (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4)) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (or (and (or (= |ULTIMATE.start_l4_insert_~item~0#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0))) (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_~item~0#1.base|))) (and (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_~item~0#1.base|))) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~list#1.base|) |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)) 0)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_~item~1#1.base|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (or (= |ULTIMATE.start_l4_insert_~item~0#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0)) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:43:15,494 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:43:15,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:43:15,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-25 18:43:15,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438446867] [2021-11-25 18:43:15,495 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:43:15,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:43:15,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:43:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:43:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 18:43:15,496 INFO L87 Difference]: Start difference. First operand 523 states and 645 transitions. Second operand has 20 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:43:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:43:19,499 INFO L93 Difference]: Finished difference Result 653 states and 802 transitions. [2021-11-25 18:43:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:43:19,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 91 [2021-11-25 18:43:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:43:19,507 INFO L225 Difference]: With dead ends: 653 [2021-11-25 18:43:19,507 INFO L226 Difference]: Without dead ends: 653 [2021-11-25 18:43:19,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=341, Invalid=2965, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 18:43:19,509 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 108 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 930 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:43:19,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 536 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 904 Invalid, 0 Unknown, 930 Unchecked, 3.1s Time] [2021-11-25 18:43:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-25 18:43:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 561. [2021-11-25 18:43:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 413 states have (on average 1.4213075060532687) internal successors, (587), 494 states have internal predecessors, (587), 51 states have call successors, (51), 19 states have call predecessors, (51), 19 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-25 18:43:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 689 transitions. [2021-11-25 18:43:19,531 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 689 transitions. Word has length 91 [2021-11-25 18:43:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:43:19,531 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 689 transitions. [2021-11-25 18:43:19,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:43:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 689 transitions. [2021-11-25 18:43:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 18:43:19,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:43:19,534 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:43:19,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 18:43:19,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:43:19,757 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:43:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:43:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1434110822, now seen corresponding path program 1 times [2021-11-25 18:43:19,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:43:19,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728177185] [2021-11-25 18:43:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:19,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:43:19,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:43:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196984981] [2021-11-25 18:43:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:19,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:43:19,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:43:19,788 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:43:19,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 18:43:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:43:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 18:43:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:43:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-11-25 18:43:20,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:43:20,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:43:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728177185] [2021-11-25 18:43:20,266 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:43:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196984981] [2021-11-25 18:43:20,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196984981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:43:20,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:43:20,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:43:20,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069125103] [2021-11-25 18:43:20,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:43:20,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:43:20,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:43:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:43:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:43:20,268 INFO L87 Difference]: Start difference. First operand 561 states and 689 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:43:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:43:20,459 INFO L93 Difference]: Finished difference Result 566 states and 695 transitions. [2021-11-25 18:43:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:43:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 92 [2021-11-25 18:43:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:43:20,463 INFO L225 Difference]: With dead ends: 566 [2021-11-25 18:43:20,463 INFO L226 Difference]: Without dead ends: 566 [2021-11-25 18:43:20,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:43:20,464 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 117 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:43:20,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 446 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:43:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-25 18:43:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 560. [2021-11-25 18:43:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 413 states have (on average 1.4164648910411621) internal successors, (585), 493 states have internal predecessors, (585), 51 states have call successors, (51), 19 states have call predecessors, (51), 19 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-25 18:43:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 687 transitions. [2021-11-25 18:43:20,482 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 687 transitions. Word has length 92 [2021-11-25 18:43:20,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:43:20,483 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 687 transitions. [2021-11-25 18:43:20,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:43:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 687 transitions. [2021-11-25 18:43:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 18:43:20,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:43:20,485 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:43:20,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 18:43:20,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 18:43:20,711 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:43:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:43:20,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1434110821, now seen corresponding path program 1 times [2021-11-25 18:43:20,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:43:20,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039565180] [2021-11-25 18:43:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:20,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:43:20,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:43:20,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339010272] [2021-11-25 18:43:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:20,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:43:20,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:43:20,755 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:43:20,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 18:43:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:43:21,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:43:21,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:43:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 104 proven. 142 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-11-25 18:43:21,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:43:21,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:43:21,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:43:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 104 proven. 142 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-11-25 18:43:21,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:43:21,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039565180] [2021-11-25 18:43:21,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:43:21,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339010272] [2021-11-25 18:43:21,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339010272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:43:21,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286456019] [2021-11-25 18:43:21,912 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-25 18:43:21,913 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:43:21,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:43:21,913 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:43:21,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:43:21,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:43:21,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:43:21,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:21,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:22,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:43:22,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:43:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:43:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:22,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:22,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:43:22,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:43:22,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:43:22,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:43:23,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:43:23,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:43:23,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:43:23,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,340 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:43:23,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:43:23,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,366 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:43:23,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:43:23,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:23,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:23,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,492 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:43:23,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:43:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,525 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:43:23,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:43:23,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:43:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,682 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:43:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:43:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,761 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:43:23,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:43:23,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,883 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:43:23,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 81 [2021-11-25 18:43:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:23,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:23,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:24,031 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:43:24,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 59 treesize of output 58 [2021-11-25 18:43:24,309 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:43:24,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:43:24,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:43:24,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:24,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:24,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:24,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:24,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:24,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:24,680 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:43:39,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1286456019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:43:39,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:43:39,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [7, 7] total 44 [2021-11-25 18:43:39,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706456675] [2021-11-25 18:43:39,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:43:39,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 18:43:39,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:43:39,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 18:43:39,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1622, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 18:43:39,399 INFO L87 Difference]: Start difference. First operand 560 states and 687 transitions. Second operand has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:43:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:43:43,763 INFO L93 Difference]: Finished difference Result 626 states and 745 transitions. [2021-11-25 18:43:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-25 18:43:43,764 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 92 [2021-11-25 18:43:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:43:43,769 INFO L225 Difference]: With dead ends: 626 [2021-11-25 18:43:43,769 INFO L226 Difference]: Without dead ends: 626 [2021-11-25 18:43:43,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 224 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=376, Invalid=1786, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 18:43:43,770 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 95 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:43:43,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1130 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 18:43:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-25 18:43:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 560. [2021-11-25 18:43:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 413 states have (on average 1.414043583535109) internal successors, (584), 493 states have internal predecessors, (584), 51 states have call successors, (51), 19 states have call predecessors, (51), 19 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-25 18:43:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 686 transitions. [2021-11-25 18:43:43,790 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 686 transitions. Word has length 92 [2021-11-25 18:43:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:43:43,790 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 686 transitions. [2021-11-25 18:43:43,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:43:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 686 transitions. [2021-11-25 18:43:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 18:43:43,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:43:43,792 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:43:43,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-25 18:43:44,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 18:43:44,007 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:43:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:43:44,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1507751209, now seen corresponding path program 1 times [2021-11-25 18:43:44,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:43:44,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825261860] [2021-11-25 18:43:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:44,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:43:44,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:43:44,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198117727] [2021-11-25 18:43:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:44,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:43:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:43:44,055 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:43:44,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 18:43:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:43:44,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:43:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:43:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-11-25 18:43:44,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:43:44,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:43:44,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825261860] [2021-11-25 18:43:44,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:43:44,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198117727] [2021-11-25 18:43:44,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198117727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:43:44,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:43:44,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:43:44,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720267548] [2021-11-25 18:43:44,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:43:44,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:43:44,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:43:44,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:43:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:43:44,864 INFO L87 Difference]: Start difference. First operand 560 states and 686 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:43:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:43:45,224 INFO L93 Difference]: Finished difference Result 563 states and 690 transitions. [2021-11-25 18:43:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:43:45,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 93 [2021-11-25 18:43:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:43:45,229 INFO L225 Difference]: With dead ends: 563 [2021-11-25 18:43:45,229 INFO L226 Difference]: Without dead ends: 563 [2021-11-25 18:43:45,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:43:45,230 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 60 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:43:45,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 304 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:43:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-25 18:43:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 559. [2021-11-25 18:43:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 413 states have (on average 1.4092009685230025) internal successors, (582), 492 states have internal predecessors, (582), 51 states have call successors, (51), 19 states have call predecessors, (51), 19 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-25 18:43:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 684 transitions. [2021-11-25 18:43:45,249 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 684 transitions. Word has length 93 [2021-11-25 18:43:45,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:43:45,250 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 684 transitions. [2021-11-25 18:43:45,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:43:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 684 transitions. [2021-11-25 18:43:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 18:43:45,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:43:45,251 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:43:45,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 18:43:45,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:43:45,479 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:43:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:43:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1544570540, now seen corresponding path program 1 times [2021-11-25 18:43:45,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:43:45,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037310423] [2021-11-25 18:43:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:45,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:43:45,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:43:45,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830643958] [2021-11-25 18:43:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:45,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:43:45,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:43:45,521 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:43:45,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 18:43:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:43:46,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-25 18:43:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:43:46,346 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:43:46,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:43:46,457 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:43:46,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:43:46,548 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:43:46,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:43:46,648 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:43:46,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-25 18:43:46,817 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:43:46,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-11-25 18:43:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 5 proven. 606 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-25 18:43:47,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:43:47,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:43:47,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037310423] [2021-11-25 18:43:47,246 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:43:47,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830643958] [2021-11-25 18:43:47,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830643958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:43:47,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451865768] [2021-11-25 18:43:47,248 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-25 18:43:47,248 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:43:47,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:43:47,249 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:43:47,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:43:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:43:47,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:43:47,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:47,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:47,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:47,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:47,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:43:47,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:47,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:43:47,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:47,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:43:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:47,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:47,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:47,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:43:47,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:43:47,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:43:47,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:43:48,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:43:48,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:43:48,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:43:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:48,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:48,549 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:43:48,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:43:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:48,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:48,580 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:43:48,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:43:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:48,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:48,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:48,648 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:43:48,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:43:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:48,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:48,689 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:43:48,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:43:48,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:48,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:43:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:48,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:48,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:48,869 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:43:48,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:43:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:48,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:48,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:48,933 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:43:48,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:43:49,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,094 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:43:49,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 18:43:49,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:49,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,226 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:43:49,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 58 [2021-11-25 18:43:49,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:49,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,472 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:43:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 121 treesize of output 114 [2021-11-25 18:43:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:49,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:49,585 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:43:49,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 60 treesize of output 83 [2021-11-25 18:43:49,617 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:43:49,730 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:43:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:43:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:43:50,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:43:50,067 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:43:50,277 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:43:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:43:50,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:43:50,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:43:50,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:43:50,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:43:50,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:43:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:50,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:43:50,666 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:44:15,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27058#(and (<= |~#list~0.base| 3) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|)) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (not (= (select |#valid| |ULTIMATE.start_l1_insert_~list#1.base|) 1)) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.base|) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |~#list~0.offset| 0))' at error location [2021-11-25 18:44:15,129 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:44:15,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:44:15,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-25 18:44:15,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32608424] [2021-11-25 18:44:15,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:44:15,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:44:15,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:44:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:44:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2969, Unknown=5, NotChecked=0, Total=3306 [2021-11-25 18:44:15,130 INFO L87 Difference]: Start difference. First operand 559 states and 684 transitions. Second operand has 20 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:44:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:44:15,756 INFO L93 Difference]: Finished difference Result 953 states and 1175 transitions. [2021-11-25 18:44:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:44:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 95 [2021-11-25 18:44:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:44:15,761 INFO L225 Difference]: With dead ends: 953 [2021-11-25 18:44:15,762 INFO L226 Difference]: Without dead ends: 953 [2021-11-25 18:44:15,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 135 SyntacticMatches, 15 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=375, Invalid=3526, Unknown=5, NotChecked=0, Total=3906 [2021-11-25 18:44:15,763 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 172 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:44:15,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1965 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 687 Invalid, 0 Unknown, 419 Unchecked, 0.4s Time] [2021-11-25 18:44:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-11-25 18:44:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 946. [2021-11-25 18:44:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 741 states have (on average 1.3346828609986505) internal successors, (989), 823 states have internal predecessors, (989), 93 states have call successors, (93), 37 states have call predecessors, (93), 37 states have return successors, (93), 85 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 18:44:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1175 transitions. [2021-11-25 18:44:15,792 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1175 transitions. Word has length 95 [2021-11-25 18:44:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:44:15,793 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1175 transitions. [2021-11-25 18:44:15,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:44:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1175 transitions. [2021-11-25 18:44:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 18:44:15,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:44:15,795 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:44:15,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 18:44:16,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 18:44:16,011 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:44:16,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:44:16,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1544570539, now seen corresponding path program 1 times [2021-11-25 18:44:16,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:44:16,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575613481] [2021-11-25 18:44:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:16,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:44:16,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:44:16,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585405751] [2021-11-25 18:44:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:16,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:44:16,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:44:16,081 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:44:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 18:44:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:23,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 181 conjunts are in the unsatisfiable core [2021-11-25 18:44:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:44:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:44:23,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:44:25,041 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:44:25,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:44:25,180 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:44:25,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:44:26,039 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:44:26,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:44:26,188 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:44:26,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-25 18:44:26,986 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:44:26,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:44:27,175 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 18:44:27,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2021-11-25 18:44:28,031 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:44:28,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:44:28,201 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-25 18:44:28,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 18:44:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:28,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 18:44:28,868 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:44:28,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 26 treesize of output 32 [2021-11-25 18:44:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 5 proven. 716 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-25 18:44:30,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:44:30,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:44:30,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575613481] [2021-11-25 18:44:30,952 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:44:30,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585405751] [2021-11-25 18:44:30,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585405751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:44:30,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110173325] [2021-11-25 18:44:30,953 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-25 18:44:30,953 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:44:30,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:44:30,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:44:30,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:44:31,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:44:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:44:31,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:44:31,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:44:31,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:44:31,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:31,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:44:31,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:31,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:44:31,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:31,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:44:31,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:44:31,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:44:31,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:44:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:44:31,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:44:31,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:44:31,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:44:32,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:44:32,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:44:32,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:44:32,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:44:32,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,338 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:44:32,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:44:32,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,370 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:44:32,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:44:32,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:44:32,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,456 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:44:32,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:44:32,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,496 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:44:32,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:44:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,651 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:44:32,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:44:32,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:44:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,757 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:44:32,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:44:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:32,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:32,892 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:44:32,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 18:44:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:33,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,063 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:44:33,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 58 [2021-11-25 18:44:33,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:44:33,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:44:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:33,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:33,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,371 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:44:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 133 treesize of output 120 [2021-11-25 18:44:33,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:33,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:33,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:44:33,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:44:33,505 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:44:33,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 60 treesize of output 83 [2021-11-25 18:44:33,532 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:44:33,645 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:44:33,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:44:33,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:44:33,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:44:33,930 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:44:34,178 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:44:34,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:44:34,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:44:34,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:44:34,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:44:34,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:44:34,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:44:34,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:44:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:44:34,564 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:44:54,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29367#(and (<= |~#list~0.base| 3) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|)) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.base|) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (< (select |#length| |ULTIMATE.start_l1_insert_~list#1.base|) (+ |ULTIMATE.start_l1_insert_~list#1.offset| 4)) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |~#list~0.offset| 0))' at error location [2021-11-25 18:44:54,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:44:54,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:44:54,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-25 18:44:54,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776409213] [2021-11-25 18:44:54,726 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:44:54,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 18:44:54,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:44:54,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 18:44:54,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=4565, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 18:44:54,729 INFO L87 Difference]: Start difference. First operand 946 states and 1175 transitions. Second operand has 33 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 26 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 18:44:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:44:59,857 INFO L93 Difference]: Finished difference Result 1048 states and 1301 transitions. [2021-11-25 18:44:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:44:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 26 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 95 [2021-11-25 18:44:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:44:59,867 INFO L225 Difference]: With dead ends: 1048 [2021-11-25 18:44:59,867 INFO L226 Difference]: Without dead ends: 1048 [2021-11-25 18:44:59,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=462, Invalid=5390, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 18:44:59,868 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 108 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1957 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:44:59,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 668 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 691 Invalid, 0 Unknown, 1957 Unchecked, 3.0s Time] [2021-11-25 18:44:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-11-25 18:44:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 954. [2021-11-25 18:44:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 749 states have (on average 1.335113484646195) internal successors, (1000), 831 states have internal predecessors, (1000), 93 states have call successors, (93), 37 states have call predecessors, (93), 37 states have return successors, (93), 85 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 18:44:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1186 transitions. [2021-11-25 18:44:59,898 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1186 transitions. Word has length 95 [2021-11-25 18:44:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:44:59,898 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1186 transitions. [2021-11-25 18:44:59,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 26 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 18:44:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1186 transitions. [2021-11-25 18:44:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 18:44:59,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:44:59,900 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:44:59,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:00,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 18:45:00,127 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:45:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:00,127 INFO L85 PathProgramCache]: Analyzing trace with hash -637046407, now seen corresponding path program 1 times [2021-11-25 18:45:00,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:45:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267853210] [2021-11-25 18:45:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:00,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:45:00,169 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:45:00,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818385816] [2021-11-25 18:45:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:00,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:45:00,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:45:00,171 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:45:00,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 18:45:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:00,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 18:45:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-11-25 18:45:00,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:45:00,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:45:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267853210] [2021-11-25 18:45:00,868 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:45:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818385816] [2021-11-25 18:45:00,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818385816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:00,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:45:00,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:45:00,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93162703] [2021-11-25 18:45:00,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:00,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:45:00,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:45:00,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:45:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:45:00,869 INFO L87 Difference]: Start difference. First operand 954 states and 1186 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:45:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:01,089 INFO L93 Difference]: Finished difference Result 953 states and 1184 transitions. [2021-11-25 18:45:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:45:01,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 96 [2021-11-25 18:45:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:01,095 INFO L225 Difference]: With dead ends: 953 [2021-11-25 18:45:01,095 INFO L226 Difference]: Without dead ends: 953 [2021-11-25 18:45:01,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:45:01,096 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 95 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:01,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 439 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:45:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-11-25 18:45:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 953. [2021-11-25 18:45:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 749 states have (on average 1.3324432576769025) internal successors, (998), 830 states have internal predecessors, (998), 93 states have call successors, (93), 37 states have call predecessors, (93), 37 states have return successors, (93), 85 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 18:45:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1184 transitions. [2021-11-25 18:45:01,125 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1184 transitions. Word has length 96 [2021-11-25 18:45:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:01,126 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1184 transitions. [2021-11-25 18:45:01,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:45:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1184 transitions. [2021-11-25 18:45:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 18:45:01,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:01,128 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:01,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:45:01,351 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:45:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash -637046406, now seen corresponding path program 1 times [2021-11-25 18:45:01,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:45:01,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986583162] [2021-11-25 18:45:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:01,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:45:01,395 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:45:01,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189751388] [2021-11-25 18:45:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:01,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:45:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:45:01,397 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:45:01,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 18:46:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:46:01,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 18:46:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:46:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 539 proven. 21 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-25 18:46:02,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:46:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 104 proven. 163 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2021-11-25 18:46:02,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:46:02,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986583162] [2021-11-25 18:46:02,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:46:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189751388] [2021-11-25 18:46:02,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189751388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:46:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687332076] [2021-11-25 18:46:02,611 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2021-11-25 18:46:02,611 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:46:02,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:46:02,612 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:46:02,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:46:02,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:46:02,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:46:02,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:02,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:46:02,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:02,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:02,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:46:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:02,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:46:02,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:02,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:46:02,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:02,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:46:02,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:02,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:46:02,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:46:02,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:46:02,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:46:03,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:46:03,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:46:03,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:46:03,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:03,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:03,942 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:46:03,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:46:03,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:03,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:03,978 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:46:03,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:46:04,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:46:04,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:46:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,100 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:46:04,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:46:04,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,147 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:46:04,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:46:04,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,301 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:46:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:46:04,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:46:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,409 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:46:04,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:46:04,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:46:04,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,558 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:46:04,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 18:46:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:04,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,727 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:46:04,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 58 [2021-11-25 18:46:04,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:46:04,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,884 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:46:04,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:46:04,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,908 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:46:04,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:46:04,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:04,958 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:46:04,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:46:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:46:04,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:05,004 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:46:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:46:05,178 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:46:05,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:46:05,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:46:05,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:05,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:46:05,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:05,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:46:05,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:05,610 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:46:19,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34204#(and (= (select |#valid| |ULTIMATE.start_l1_insert_~list#1.base|) 1) (<= |~#list~0.base| 3) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_#t~mem17#1.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~item~2#1.base|)) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|)) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_l1_insert_~item~3#1.base|) (+ |ULTIMATE.start_l1_insert_~item~3#1.offset| 8)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_#t~mem17#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.base|) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l2_insert_~item~2#1.base|) 1) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= (+ |ULTIMATE.start_l1_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l1_insert_~list#1.base|)) (<= |~#list~0.offset| 0))' at error location [2021-11-25 18:46:19,020 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:46:19,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:46:19,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-25 18:46:19,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400005356] [2021-11-25 18:46:19,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:46:19,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:46:19,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:46:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:46:19,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2741, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 18:46:19,022 INFO L87 Difference]: Start difference. First operand 953 states and 1184 transitions. Second operand has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 18:46:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:46:19,953 INFO L93 Difference]: Finished difference Result 1129 states and 1360 transitions. [2021-11-25 18:46:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:46:19,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2021-11-25 18:46:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:46:19,960 INFO L225 Difference]: With dead ends: 1129 [2021-11-25 18:46:19,960 INFO L226 Difference]: Without dead ends: 1041 [2021-11-25 18:46:19,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 226 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=520, Invalid=4036, Unknown=0, NotChecked=0, Total=4556 [2021-11-25 18:46:19,961 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 22 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:46:19,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1707 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:46:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-11-25 18:46:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1041. [2021-11-25 18:46:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 837 states have (on average 1.2974910394265233) internal successors, (1086), 918 states have internal predecessors, (1086), 93 states have call successors, (93), 37 states have call predecessors, (93), 37 states have return successors, (93), 85 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 18:46:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1272 transitions. [2021-11-25 18:46:19,990 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1272 transitions. Word has length 96 [2021-11-25 18:46:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:46:19,991 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1272 transitions. [2021-11-25 18:46:19,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 18:46:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1272 transitions. [2021-11-25 18:46:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 18:46:19,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:46:19,993 INFO L514 BasicCegarLoop]: trace histogram [47, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:46:20,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-25 18:46:20,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:46:20,194 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:46:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:46:20,195 INFO L85 PathProgramCache]: Analyzing trace with hash -176580885, now seen corresponding path program 2 times [2021-11-25 18:46:20,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:46:20,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282902038] [2021-11-25 18:46:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:46:20,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:46:20,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:46:20,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996083686] [2021-11-25 18:46:20,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:46:20,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:46:20,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:46:20,236 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:46:20,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 18:46:56,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:46:56,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:46:56,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 18:46:56,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:46:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1438 backedges. 375 proven. 28 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2021-11-25 18:46:57,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:46:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1438 backedges. 375 proven. 28 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2021-11-25 18:46:57,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:46:57,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282902038] [2021-11-25 18:46:57,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:46:57,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996083686] [2021-11-25 18:46:57,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996083686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:46:57,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081087131] [2021-11-25 18:46:57,906 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2021-11-25 18:46:57,906 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:46:57,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:46:57,906 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:46:57,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:46:57,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:46:57,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:46:57,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:46:57,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:46:58,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:46:58,088 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:46:58,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 183 [2021-11-25 18:46:58,147 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:46:58,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:46:58,176 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:46:58,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 173 [2021-11-25 18:46:58,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:58,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:46:58,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:46:58,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:46:58,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:46:58,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:46:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:46:59,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:46:59,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:46:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:46:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,128 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:46:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:46:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,154 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:46:59,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:46:59,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:46:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,223 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:46:59,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:46:59,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,278 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:46:59,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:46:59,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:46:59,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,432 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:46:59,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:46:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,515 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:46:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:46:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:46:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,648 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:46:59,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 81 [2021-11-25 18:46:59,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:59,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:59,796 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:46:59,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 59 treesize of output 58 [2021-11-25 18:46:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:47:00,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:00,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:00,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:00,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:00,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:00,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:00,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:00,062 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:47:00,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 133 treesize of output 120 [2021-11-25 18:47:00,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:47:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:00,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:00,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:00,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:00,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:00,181 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:47:00,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 60 treesize of output 83 [2021-11-25 18:47:00,201 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:47:00,255 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:47:00,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:47:00,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:47:00,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:47:00,468 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:47:00,652 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:47:00,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:47:00,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:47:00,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:47:00,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:47:00,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:47:00,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:47:00,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:47:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:47:01,010 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:47:16,062 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37104#(and (= (select |#valid| |ULTIMATE.start_l1_insert_~list#1.base|) 1) (<= |~#list~0.base| 3) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_#t~mem17#1.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|)) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_l1_insert_~item~3#1.base|) (+ |ULTIMATE.start_l1_insert_~item~3#1.offset| 8)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_#t~mem17#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.base|) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= (+ |ULTIMATE.start_l1_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l1_insert_~list#1.base|)) (<= |~#list~0.offset| 0))' at error location [2021-11-25 18:47:16,062 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:47:16,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:47:16,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-25 18:47:16,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508149954] [2021-11-25 18:47:16,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:47:16,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 18:47:16,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:16,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 18:47:16,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2899, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 18:47:16,064 INFO L87 Difference]: Start difference. First operand 1041 states and 1272 transitions. Second operand has 22 states, 20 states have (on average 2.65) internal successors, (53), 22 states have internal predecessors, (53), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:47:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:22,748 INFO L93 Difference]: Finished difference Result 1217 states and 1560 transitions. [2021-11-25 18:47:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 18:47:22,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.65) internal successors, (53), 22 states have internal predecessors, (53), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 109 [2021-11-25 18:47:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:22,756 INFO L225 Difference]: With dead ends: 1217 [2021-11-25 18:47:22,757 INFO L226 Difference]: Without dead ends: 1185 [2021-11-25 18:47:22,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 263 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=821, Invalid=5031, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 18:47:22,758 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 101 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:22,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1894 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:47:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-25 18:47:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1185. [2021-11-25 18:47:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 981 states have (on average 1.253822629969419) internal successors, (1230), 1062 states have internal predecessors, (1230), 93 states have call successors, (93), 37 states have call predecessors, (93), 37 states have return successors, (93), 85 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 18:47:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1416 transitions. [2021-11-25 18:47:22,787 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1416 transitions. Word has length 109 [2021-11-25 18:47:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:22,787 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1416 transitions. [2021-11-25 18:47:22,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.65) internal successors, (53), 22 states have internal predecessors, (53), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:47:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1416 transitions. [2021-11-25 18:47:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-25 18:47:22,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:22,789 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:22,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:23,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:23,002 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:47:23,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash 829881946, now seen corresponding path program 3 times [2021-11-25 18:47:23,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:23,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146842469] [2021-11-25 18:47:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:23,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:23,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:47:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610898394] [2021-11-25 18:47:23,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:47:23,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:23,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:23,055 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:23,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 18:47:28,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:47:28,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:47:28,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-25 18:47:28,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:28,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:47:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 18:47:28,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:47:34,489 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:47:34,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-11-25 18:47:36,489 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:47:36,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:47:42,832 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:47:42,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-11-25 18:47:44,441 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:47:44,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-25 18:47:47,528 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:47:47,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-11-25 18:47:49,784 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-25 18:47:49,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:47:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:54,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-11-25 18:47:54,578 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-25 18:47:54,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:48:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 448 proven. 1224 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-25 18:48:18,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:48:21,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146842469] [2021-11-25 18:48:21,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:48:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610898394] [2021-11-25 18:48:21,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610898394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:48:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412815809] [2021-11-25 18:48:21,094 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2021-11-25 18:48:21,094 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:48:21,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:48:21,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:48:21,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:48:21,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:48:21,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:48:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:48:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:48:21,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:48:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:21,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:48:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:21,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 192 [2021-11-25 18:48:21,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:21,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 190 [2021-11-25 18:48:21,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:48:21,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:48:21,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:48:21,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:48:21,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:48:21,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:48:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:48:22,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:48:22,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:48:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:48:22,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:48:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,232 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:48:22,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:48:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,254 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:48:22,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:48:22,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,310 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:48:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:48:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:48:22,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,365 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:48:22,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:48:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,487 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:48:22,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:48:22,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:48:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,601 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:48:22,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:48:22,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,716 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:48:22,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 59 treesize of output 58 [2021-11-25 18:48:22,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:22,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:22,791 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:48:22,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 81 [2021-11-25 18:48:22,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:48:23,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:23,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:23,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:23,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:23,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:23,139 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:48:23,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 137 treesize of output 124 [2021-11-25 18:48:23,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:48:23,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:23,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:23,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:48:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:23,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:48:23,283 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:48:23,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 60 treesize of output 83 [2021-11-25 18:48:23,301 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:48:23,391 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:48:23,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:48:23,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:48:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:48:23,620 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:48:23,897 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:48:23,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:48:24,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:48:24,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:48:24,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:48:24,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:48:24,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:48:24,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:48:24,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:48:24,374 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:49:02,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40019#(and (= (select |#valid| |ULTIMATE.start_l1_insert_~list#1.base|) 1) (<= |~#list~0.base| 3) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_#t~mem17#1.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|)) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_l1_insert_~item~3#1.base|) (+ |ULTIMATE.start_l1_insert_~item~3#1.offset| 8)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_#t~mem17#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.base|) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= (+ |ULTIMATE.start_l1_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l1_insert_~list#1.base|)) (<= |~#list~0.offset| 0))' at error location [2021-11-25 18:49:02,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:49:02,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:49:02,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-25 18:49:02,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624267318] [2021-11-25 18:49:02,194 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:49:02,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 18:49:02,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 18:49:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=5304, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 18:49:02,195 INFO L87 Difference]: Start difference. First operand 1185 states and 1416 transitions. Second operand has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:49:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:12,057 INFO L93 Difference]: Finished difference Result 1357 states and 1635 transitions. [2021-11-25 18:49:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-25 18:49:12,059 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 118 [2021-11-25 18:49:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:12,067 INFO L225 Difference]: With dead ends: 1357 [2021-11-25 18:49:12,067 INFO L226 Difference]: Without dead ends: 1357 [2021-11-25 18:49:12,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 171 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=500, Invalid=7156, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 18:49:12,069 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 162 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 5930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5342 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:12,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2211 Invalid, 5930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 567 Invalid, 0 Unknown, 5342 Unchecked, 0.8s Time] [2021-11-25 18:49:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-11-25 18:49:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1195. [2021-11-25 18:49:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 991 states have (on average 1.2583249243188699) internal successors, (1247), 1072 states have internal predecessors, (1247), 93 states have call successors, (93), 37 states have call predecessors, (93), 37 states have return successors, (93), 85 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 18:49:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1433 transitions. [2021-11-25 18:49:12,098 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1433 transitions. Word has length 118 [2021-11-25 18:49:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:12,098 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1433 transitions. [2021-11-25 18:49:12,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:49:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1433 transitions. [2021-11-25 18:49:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-25 18:49:12,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:12,100 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:12,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 18:49:12,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-25 18:49:12,327 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:49:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash -43452735, now seen corresponding path program 1 times [2021-11-25 18:49:12,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:12,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730820089] [2021-11-25 18:49:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:12,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:12,371 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:49:12,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525546934] [2021-11-25 18:49:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:12,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:12,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:49:12,379 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:49:12,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 18:49:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:12,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:49:12,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:49:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:49:13,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:49:13,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:13,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730820089] [2021-11-25 18:49:13,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:49:13,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525546934] [2021-11-25 18:49:13,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525546934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:13,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:13,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:49:13,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423109977] [2021-11-25 18:49:13,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:13,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:49:13,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:49:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:49:13,146 INFO L87 Difference]: Start difference. First operand 1195 states and 1433 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:49:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:13,603 INFO L93 Difference]: Finished difference Result 1194 states and 1431 transitions. [2021-11-25 18:49:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:49:13,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 119 [2021-11-25 18:49:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:13,612 INFO L225 Difference]: With dead ends: 1194 [2021-11-25 18:49:13,613 INFO L226 Difference]: Without dead ends: 1194 [2021-11-25 18:49:13,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:49:13,614 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 48 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:13,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 305 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:49:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-25 18:49:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2021-11-25 18:49:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 991 states have (on average 1.2563067608476286) internal successors, (1245), 1071 states have internal predecessors, (1245), 93 states have call successors, (93), 37 states have call predecessors, (93), 37 states have return successors, (93), 85 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 18:49:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1431 transitions. [2021-11-25 18:49:13,644 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1431 transitions. Word has length 119 [2021-11-25 18:49:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:13,644 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1431 transitions. [2021-11-25 18:49:13,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:49:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1431 transitions. [2021-11-25 18:49:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 18:49:13,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:13,646 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:13,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-25 18:49:13,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-25 18:49:13,871 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:49:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:13,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1191940589, now seen corresponding path program 1 times [2021-11-25 18:49:13,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:13,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035108574] [2021-11-25 18:49:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:13,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:13,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:49:13,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793784579] [2021-11-25 18:49:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:13,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:13,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:49:13,927 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:49:13,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 18:49:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:14,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-25 18:49:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:49:14,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:49:14,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:49:14,888 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:49:14,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:49:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:15,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:49:15,200 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:49:15,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-25 18:49:15,541 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 18:49:15,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2021-11-25 18:49:15,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:49:16,028 INFO L354 Elim1Store]: treesize reduction 56, result has 27.3 percent of original size [2021-11-25 18:49:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 38 [2021-11-25 18:49:16,073 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:49:16,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:49:16,441 INFO L354 Elim1Store]: treesize reduction 102, result has 20.3 percent of original size [2021-11-25 18:49:16,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 32 treesize of output 46 [2021-11-25 18:49:16,498 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:49:16,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-25 18:49:16,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:16,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-25 18:49:16,929 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-25 18:49:16,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 36 treesize of output 46 [2021-11-25 18:49:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-25 18:49:17,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:49:18,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035108574] [2021-11-25 18:49:18,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:49:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793784579] [2021-11-25 18:49:18,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793784579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:49:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794170942] [2021-11-25 18:49:18,112 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2021-11-25 18:49:18,112 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:49:18,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:49:18,113 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:49:18,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:49:18,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:49:18,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:49:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:49:18,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:49:18,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:49:18,332 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:49:18,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:49:18,399 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:49:18,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:49:18,462 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:18,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 175 [2021-11-25 18:49:18,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:18,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:18,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:49:18,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:49:18,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:49:18,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:49:18,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:49:19,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:49:19,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:49:19,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:49:19,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:19,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:19,563 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:19,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:49:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:19,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:19,591 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:19,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:49:19,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:19,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:19,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:19,647 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:19,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:49:19,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:19,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:19,700 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:19,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:49:19,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:19,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:19,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:19,870 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:49:19,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:49:19,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:19,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:19,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,002 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:49:20,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:49:20,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:49:20,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:20,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:20,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,188 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:49:20,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 59 treesize of output 58 [2021-11-25 18:49:20,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,327 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:49:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 79 treesize of output 82 [2021-11-25 18:49:20,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:20,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,483 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:49:20,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,505 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:49:20,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,547 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:20,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:49:20,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,583 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:20,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:49:20,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:20,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:49:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:20,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,692 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:20,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:49:20,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:20,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,736 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:20,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:49:20,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:20,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,836 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 18:49:20,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:49:20,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:20,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:20,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:20,902 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 18:49:20,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:49:21,035 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:49:21,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:49:21,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:49:21,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:49:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:49:21,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:49:21,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:21,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:49:21,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:21,415 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:49:38,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45825#(and (<= (+ |ULTIMATE.start_l1_insert_~item~3#1.offset| 8) (select |#length| |ULTIMATE.start_l1_insert_~item~3#1.base|)) (= (select |#valid| |ULTIMATE.start_l1_insert_~list#1.base|) 1) (<= |~#list~0.base| 3) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (= (select |#valid| |ULTIMATE.start_l1_insert_~item~3#1.base|) 1) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~item~2#1.base|)) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|)) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_~item~3#1.offset|) (< (select |#length| |ULTIMATE.start_l0_insert_~list#1.base|) (+ 4 |ULTIMATE.start_l0_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.base|) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_~item~3#1.base|) (= (select |#valid| |ULTIMATE.start_l2_insert_~item~2#1.base|) 1) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= (+ |ULTIMATE.start_l1_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l1_insert_~list#1.base|)) (<= |~#list~0.offset| 0))' at error location [2021-11-25 18:49:38,126 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:49:38,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:49:38,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-25 18:49:38,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492178525] [2021-11-25 18:49:38,126 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:49:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:49:38,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:49:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=4569, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 18:49:38,128 INFO L87 Difference]: Start difference. First operand 1194 states and 1431 transitions. Second operand has 27 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:49:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:38,872 INFO L93 Difference]: Finished difference Result 1452 states and 1714 transitions. [2021-11-25 18:49:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:49:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 121 [2021-11-25 18:49:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:38,885 INFO L225 Difference]: With dead ends: 1452 [2021-11-25 18:49:38,886 INFO L226 Difference]: Without dead ends: 1452 [2021-11-25 18:49:38,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=423, Invalid=4979, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 18:49:38,888 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 129 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2011 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:38,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1193 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 378 Invalid, 0 Unknown, 2011 Unchecked, 0.6s Time] [2021-11-25 18:49:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-11-25 18:49:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1294. [2021-11-25 18:49:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1087 states have (on average 1.2428702851885924) internal successors, (1351), 1163 states have internal predecessors, (1351), 89 states have call successors, (89), 45 states have call predecessors, (89), 45 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-25 18:49:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1529 transitions. [2021-11-25 18:49:38,920 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1529 transitions. Word has length 121 [2021-11-25 18:49:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:38,920 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 1529 transitions. [2021-11-25 18:49:38,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:49:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1529 transitions. [2021-11-25 18:49:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 18:49:38,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:38,922 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:38,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-25 18:49:39,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:39,141 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:49:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1191940588, now seen corresponding path program 1 times [2021-11-25 18:49:39,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:39,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249180036] [2021-11-25 18:49:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:39,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:39,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:49:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250028371] [2021-11-25 18:49:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:39,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:39,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:49:39,183 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:49:39,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 18:49:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:39,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-25 18:49:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:49:39,979 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:49:39,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:49:40,114 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:49:40,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:49:40,215 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:49:40,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:49:40,318 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:49:40,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:49:40,421 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:49:40,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:49:40,597 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:49:40,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:49:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:49:40,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:49:40,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:40,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249180036] [2021-11-25 18:49:40,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:49:40,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250028371] [2021-11-25 18:49:40,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250028371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:40,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:40,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:49:40,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465450214] [2021-11-25 18:49:40,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:40,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:49:40,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:49:40,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:49:40,675 INFO L87 Difference]: Start difference. First operand 1294 states and 1529 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:49:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:41,290 INFO L93 Difference]: Finished difference Result 1447 states and 1706 transitions. [2021-11-25 18:49:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:49:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 121 [2021-11-25 18:49:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:41,299 INFO L225 Difference]: With dead ends: 1447 [2021-11-25 18:49:41,299 INFO L226 Difference]: Without dead ends: 1447 [2021-11-25 18:49:41,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:49:41,300 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 157 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:41,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 794 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 387 Invalid, 0 Unknown, 249 Unchecked, 0.6s Time] [2021-11-25 18:49:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-11-25 18:49:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1297. [2021-11-25 18:49:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1090 states have (on average 1.244954128440367) internal successors, (1357), 1166 states have internal predecessors, (1357), 89 states have call successors, (89), 45 states have call predecessors, (89), 45 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-25 18:49:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1535 transitions. [2021-11-25 18:49:41,330 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1535 transitions. Word has length 121 [2021-11-25 18:49:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:41,331 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 1535 transitions. [2021-11-25 18:49:41,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:49:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1535 transitions. [2021-11-25 18:49:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 18:49:41,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:41,332 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:41,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-25 18:49:41,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-25 18:49:41,553 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:49:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1704547337, now seen corresponding path program 1 times [2021-11-25 18:49:41,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:41,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242417123] [2021-11-25 18:49:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:41,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:41,602 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:49:41,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412671876] [2021-11-25 18:49:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:41,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:49:41,604 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:49:41,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-25 18:49:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:42,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 18:49:42,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:49:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:49:42,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:49:42,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:42,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242417123] [2021-11-25 18:49:42,486 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:49:42,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412671876] [2021-11-25 18:49:42,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412671876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:42,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:42,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:49:42,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487966175] [2021-11-25 18:49:42,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:42,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:49:42,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:42,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:49:42,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:49:42,487 INFO L87 Difference]: Start difference. First operand 1297 states and 1535 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:49:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:42,737 INFO L93 Difference]: Finished difference Result 1296 states and 1533 transitions. [2021-11-25 18:49:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:49:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 122 [2021-11-25 18:49:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:42,743 INFO L225 Difference]: With dead ends: 1296 [2021-11-25 18:49:42,743 INFO L226 Difference]: Without dead ends: 1296 [2021-11-25 18:49:42,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:49:42,743 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 76 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:42,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 434 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:49:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-11-25 18:49:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1296. [2021-11-25 18:49:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1090 states have (on average 1.2431192660550459) internal successors, (1355), 1165 states have internal predecessors, (1355), 89 states have call successors, (89), 45 states have call predecessors, (89), 45 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-25 18:49:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1533 transitions. [2021-11-25 18:49:42,770 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1533 transitions. Word has length 122 [2021-11-25 18:49:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:42,770 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 1533 transitions. [2021-11-25 18:49:42,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:49:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1533 transitions. [2021-11-25 18:49:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 18:49:42,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:42,772 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:42,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-25 18:49:42,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-25 18:49:42,999 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:49:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:42,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1704547336, now seen corresponding path program 1 times [2021-11-25 18:49:42,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:43,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937283438] [2021-11-25 18:49:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:43,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:43,051 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:49:43,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802763389] [2021-11-25 18:49:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:43,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:49:43,053 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:49:43,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-25 18:49:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 18:49:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:49:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-25 18:49:44,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:49:44,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:49:44,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:49:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-25 18:49:45,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:45,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937283438] [2021-11-25 18:49:45,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:49:45,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802763389] [2021-11-25 18:49:45,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802763389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:49:45,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275503523] [2021-11-25 18:49:45,318 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-25 18:49:45,318 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:49:45,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:49:45,319 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:49:45,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:49:45,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:49:45,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:49:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:49:45,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:49:45,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:49:45,538 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:49:45,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:49:45,602 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:45,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 179 [2021-11-25 18:49:45,669 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:49:45,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 173 [2021-11-25 18:49:45,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:45,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:45,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:49:45,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:49:45,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:49:45,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:49:45,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:49:46,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:49:46,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:49:46,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:49:46,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:46,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:46,842 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:46,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:49:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:46,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:46,872 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:46,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:49:46,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:46,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:46,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:46,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:46,955 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:46,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:49:46,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:46,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:46,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:46,990 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:46,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:49:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,156 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:49:47,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:49:47,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:49:47,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,265 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:49:47,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:49:47,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,414 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:49:47,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 83 treesize of output 82 [2021-11-25 18:49:47,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,566 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:49:47,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 59 treesize of output 58 [2021-11-25 18:49:47,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:47,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,667 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:47,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:49:47,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,692 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:47,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:49:47,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,735 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:47,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:49:47,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:47,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,772 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:49:47,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:49:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,861 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:47,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:49:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:47,910 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:49:47,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:49:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:49:47,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:49:47,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:47,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:48,022 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 18:49:48,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:49:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:49:48,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:49:48,075 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 18:49:48,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:49:48,266 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:49:48,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:49:48,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:49:48,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:49:48,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:48,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:48,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:48,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:49:48,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:49:48,672 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:50:02,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55434#(and (<= (+ |ULTIMATE.start_l1_insert_~item~3#1.offset| 8) (select |#length| |ULTIMATE.start_l1_insert_~item~3#1.base|)) (= (select |#valid| |ULTIMATE.start_l1_insert_~list#1.base|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l0_insert_~list#1.base|) |ULTIMATE.start_l0_insert_~list#1.offset|) |ULTIMATE.start_l0_insert_#t~mem20#1.base|) (<= |~#list~0.base| 3) (<= 4 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (= (select |#valid| |ULTIMATE.start_l1_insert_~item~3#1.base|) 1) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (< (select |#length| |ULTIMATE.start_l0_insert_~item~4#1.base|) (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4)) (<= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~item~2#1.base|)) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|)) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l0_insert_~list#1.base|) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_~item~3#1.offset|) (= |ULTIMATE.start_l0_insert_#t~mem20#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l0_insert_~list#1.base|) |ULTIMATE.start_l0_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= (+ 4 |ULTIMATE.start_l0_insert_~list#1.offset|) (select |#length| |ULTIMATE.start_l0_insert_~list#1.base|)) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~list#1.base|) |ULTIMATE.start_l2_insert_~list#1.offset|) |ULTIMATE.start_l2_insert_~item~2#1.base|) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l1_insert_~list#1.base|) |ULTIMATE.start_l1_insert_~list#1.offset|) |ULTIMATE.start_l1_insert_~item~3#1.base|) (= (select |#valid| |ULTIMATE.start_l2_insert_~item~2#1.base|) 1) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= (+ |ULTIMATE.start_l1_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l1_insert_~list#1.base|)) (<= |~#list~0.offset| 0))' at error location [2021-11-25 18:50:02,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:50:02,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:50:02,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-25 18:50:02,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725563337] [2021-11-25 18:50:02,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:50:02,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:50:02,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:50:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2458, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 18:50:02,559 INFO L87 Difference]: Start difference. First operand 1296 states and 1533 transitions. Second operand has 14 states, 11 states have (on average 6.636363636363637) internal successors, (73), 12 states have internal predecessors, (73), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 18:50:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:03,082 INFO L93 Difference]: Finished difference Result 1295 states and 1531 transitions. [2021-11-25 18:50:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:50:03,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 6.636363636363637) internal successors, (73), 12 states have internal predecessors, (73), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 122 [2021-11-25 18:50:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:03,088 INFO L225 Difference]: With dead ends: 1295 [2021-11-25 18:50:03,089 INFO L226 Difference]: Without dead ends: 1295 [2021-11-25 18:50:03,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 306 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=419, Invalid=2661, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 18:50:03,089 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 290 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:03,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1172 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:50:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-25 18:50:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1295. [2021-11-25 18:50:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1090 states have (on average 1.2412844036697248) internal successors, (1353), 1164 states have internal predecessors, (1353), 89 states have call successors, (89), 45 states have call predecessors, (89), 45 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-25 18:50:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1531 transitions. [2021-11-25 18:50:03,116 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1531 transitions. Word has length 122 [2021-11-25 18:50:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:03,117 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1531 transitions. [2021-11-25 18:50:03,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 6.636363636363637) internal successors, (73), 12 states have internal predecessors, (73), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 18:50:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1531 transitions. [2021-11-25 18:50:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 18:50:03,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:03,118 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:03,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:03,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:03,347 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:50:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1301350026, now seen corresponding path program 1 times [2021-11-25 18:50:03,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:03,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659572858] [2021-11-25 18:50:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:03,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:03,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:50:03,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781630632] [2021-11-25 18:50:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:03,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:03,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:03,388 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:03,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-25 18:50:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:04,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:50:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:50:04,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:50:04,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659572858] [2021-11-25 18:50:04,320 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:50:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781630632] [2021-11-25 18:50:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781630632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:04,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:04,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:50:04,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984470159] [2021-11-25 18:50:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:04,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:50:04,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:50:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:50:04,322 INFO L87 Difference]: Start difference. First operand 1295 states and 1531 transitions. Second operand has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:04,786 INFO L93 Difference]: Finished difference Result 1294 states and 1529 transitions. [2021-11-25 18:50:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:50:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 123 [2021-11-25 18:50:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:04,797 INFO L225 Difference]: With dead ends: 1294 [2021-11-25 18:50:04,797 INFO L226 Difference]: Without dead ends: 1294 [2021-11-25 18:50:04,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:50:04,798 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 36 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:04,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 306 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:50:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-11-25 18:50:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1294. [2021-11-25 18:50:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1090 states have (on average 1.2394495412844038) internal successors, (1351), 1163 states have internal predecessors, (1351), 89 states have call successors, (89), 45 states have call predecessors, (89), 45 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-25 18:50:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1529 transitions. [2021-11-25 18:50:04,846 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1529 transitions. Word has length 123 [2021-11-25 18:50:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:04,847 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 1529 transitions. [2021-11-25 18:50:04,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:04,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1529 transitions. [2021-11-25 18:50:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 18:50:04,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:04,848 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:04,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:05,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-25 18:50:05,063 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:50:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -761581701, now seen corresponding path program 1 times [2021-11-25 18:50:05,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:05,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383900366] [2021-11-25 18:50:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:05,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:05,115 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:50:05,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896485886] [2021-11-25 18:50:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:05,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:05,117 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:05,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-25 18:50:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:05,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:50:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:50:06,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:50:06,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383900366] [2021-11-25 18:50:06,216 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:50:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896485886] [2021-11-25 18:50:06,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896485886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:06,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:06,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:50:06,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328220960] [2021-11-25 18:50:06,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:06,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:50:06,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:50:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:50:06,217 INFO L87 Difference]: Start difference. First operand 1294 states and 1529 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:06,633 INFO L93 Difference]: Finished difference Result 1404 states and 1660 transitions. [2021-11-25 18:50:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:50:06,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2021-11-25 18:50:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:06,641 INFO L225 Difference]: With dead ends: 1404 [2021-11-25 18:50:06,641 INFO L226 Difference]: Without dead ends: 1404 [2021-11-25 18:50:06,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:50:06,641 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 399 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:06,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 280 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:50:06,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-11-25 18:50:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1337. [2021-11-25 18:50:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1135 states have (on average 1.2616740088105727) internal successors, (1432), 1199 states have internal predecessors, (1432), 89 states have call successors, (89), 45 states have call predecessors, (89), 46 states have return successors, (96), 92 states have call predecessors, (96), 89 states have call successors, (96) [2021-11-25 18:50:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1617 transitions. [2021-11-25 18:50:06,665 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1617 transitions. Word has length 125 [2021-11-25 18:50:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:06,666 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1617 transitions. [2021-11-25 18:50:06,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1617 transitions. [2021-11-25 18:50:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 18:50:06,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:06,667 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:06,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:06,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-25 18:50:06,883 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:50:06,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash -761581700, now seen corresponding path program 1 times [2021-11-25 18:50:06,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:06,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587366303] [2021-11-25 18:50:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:06,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:06,926 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:50:06,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096349151] [2021-11-25 18:50:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:06,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:06,929 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:06,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 18:50:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:07,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:50:07,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:50:08,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:50:08,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:08,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587366303] [2021-11-25 18:50:08,379 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:50:08,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096349151] [2021-11-25 18:50:08,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096349151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:08,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:08,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:50:08,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470731300] [2021-11-25 18:50:08,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:08,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:50:08,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:08,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:50:08,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:50:08,380 INFO L87 Difference]: Start difference. First operand 1337 states and 1617 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:08,726 INFO L93 Difference]: Finished difference Result 1331 states and 1604 transitions. [2021-11-25 18:50:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:50:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2021-11-25 18:50:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:08,733 INFO L225 Difference]: With dead ends: 1331 [2021-11-25 18:50:08,733 INFO L226 Difference]: Without dead ends: 1331 [2021-11-25 18:50:08,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:50:08,734 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 216 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:08,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 259 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:50:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-11-25 18:50:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1329. [2021-11-25 18:50:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1135 states have (on average 1.2484581497797358) internal successors, (1417), 1191 states have internal predecessors, (1417), 89 states have call successors, (89), 45 states have call predecessors, (89), 46 states have return successors, (96), 92 states have call predecessors, (96), 89 states have call successors, (96) [2021-11-25 18:50:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1602 transitions. [2021-11-25 18:50:08,757 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1602 transitions. Word has length 125 [2021-11-25 18:50:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:08,757 INFO L470 AbstractCegarLoop]: Abstraction has 1329 states and 1602 transitions. [2021-11-25 18:50:08,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1602 transitions. [2021-11-25 18:50:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 18:50:08,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:08,760 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:08,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:08,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:08,967 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting l0_destroyErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:50:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1427578705, now seen corresponding path program 1 times [2021-11-25 18:50:08,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:08,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538636758] [2021-11-25 18:50:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:08,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:09,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:50:09,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786798646] [2021-11-25 18:50:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:09,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:09,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:09,032 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:09,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-25 18:50:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:50:09,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:50:10,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:50:10,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538636758] [2021-11-25 18:50:10,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:50:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786798646] [2021-11-25 18:50:10,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786798646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:10,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:10,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:50:10,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874774980] [2021-11-25 18:50:10,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:10,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:50:10,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:50:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:50:10,084 INFO L87 Difference]: Start difference. First operand 1329 states and 1602 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:10,239 INFO L93 Difference]: Finished difference Result 1451 states and 1766 transitions. [2021-11-25 18:50:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:50:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 129 [2021-11-25 18:50:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:10,247 INFO L225 Difference]: With dead ends: 1451 [2021-11-25 18:50:10,248 INFO L226 Difference]: Without dead ends: 1451 [2021-11-25 18:50:10,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:50:10,249 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 197 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:10,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 545 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:50:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-11-25 18:50:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1416. [2021-11-25 18:50:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1220 states have (on average 1.2959016393442624) internal successors, (1581), 1277 states have internal predecessors, (1581), 89 states have call successors, (89), 46 states have call predecessors, (89), 48 states have return successors, (96), 92 states have call predecessors, (96), 89 states have call successors, (96) [2021-11-25 18:50:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1766 transitions. [2021-11-25 18:50:10,279 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1766 transitions. Word has length 129 [2021-11-25 18:50:10,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:10,279 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 1766 transitions. [2021-11-25 18:50:10,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1766 transitions. [2021-11-25 18:50:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 18:50:10,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:10,282 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:10,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:10,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:10,506 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting l0_destroyErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:50:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1427584178, now seen corresponding path program 1 times [2021-11-25 18:50:10,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:10,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791582785] [2021-11-25 18:50:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:10,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:10,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:50:10,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225249017] [2021-11-25 18:50:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:10,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:10,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:10,552 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:10,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-25 18:50:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:11,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 18:50:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:12,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:12,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 18:50:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:50:12,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:50:12,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791582785] [2021-11-25 18:50:12,199 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:50:12,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225249017] [2021-11-25 18:50:12,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225249017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:12,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:12,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:50:12,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528413918] [2021-11-25 18:50:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:12,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:50:12,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:50:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:50:12,201 INFO L87 Difference]: Start difference. First operand 1416 states and 1766 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:13,067 INFO L93 Difference]: Finished difference Result 1708 states and 2122 transitions. [2021-11-25 18:50:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:50:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 129 [2021-11-25 18:50:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:13,079 INFO L225 Difference]: With dead ends: 1708 [2021-11-25 18:50:13,086 INFO L226 Difference]: Without dead ends: 1708 [2021-11-25 18:50:13,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:50:13,087 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 803 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:13,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 856 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:50:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-11-25 18:50:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1474. [2021-11-25 18:50:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1279 states have (on average 1.3244722439405785) internal successors, (1694), 1335 states have internal predecessors, (1694), 89 states have call successors, (89), 46 states have call predecessors, (89), 48 states have return successors, (96), 92 states have call predecessors, (96), 89 states have call successors, (96) [2021-11-25 18:50:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1879 transitions. [2021-11-25 18:50:13,118 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1879 transitions. Word has length 129 [2021-11-25 18:50:13,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:13,120 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 1879 transitions. [2021-11-25 18:50:13,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1879 transitions. [2021-11-25 18:50:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 18:50:13,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:13,123 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:13,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:13,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:13,337 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting l0_destroyErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:50:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:13,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1427584177, now seen corresponding path program 1 times [2021-11-25 18:50:13,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:13,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076681971] [2021-11-25 18:50:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:13,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:13,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:50:13,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089805296] [2021-11-25 18:50:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:13,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:13,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:13,382 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:13,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-25 18:50:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:14,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:50:14,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:15,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:15,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:15,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-25 18:50:15,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-25 18:50:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:50:15,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:50:15,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:15,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076681971] [2021-11-25 18:50:15,989 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:50:15,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089805296] [2021-11-25 18:50:15,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089805296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:15,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:15,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 18:50:15,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329656521] [2021-11-25 18:50:15,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:15,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:50:15,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:15,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:50:15,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:50:15,990 INFO L87 Difference]: Start difference. First operand 1474 states and 1879 transitions. Second operand has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:50:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:17,848 INFO L93 Difference]: Finished difference Result 1618 states and 2025 transitions. [2021-11-25 18:50:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:50:17,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 129 [2021-11-25 18:50:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:17,858 INFO L225 Difference]: With dead ends: 1618 [2021-11-25 18:50:17,858 INFO L226 Difference]: Without dead ends: 1618 [2021-11-25 18:50:17,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:50:17,858 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 756 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:17,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 643 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 18:50:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-11-25 18:50:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1546. [2021-11-25 18:50:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1351 states have (on average 1.3582531458179126) internal successors, (1835), 1407 states have internal predecessors, (1835), 89 states have call successors, (89), 46 states have call predecessors, (89), 48 states have return successors, (96), 92 states have call predecessors, (96), 89 states have call successors, (96) [2021-11-25 18:50:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2020 transitions. [2021-11-25 18:50:17,886 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2020 transitions. Word has length 129 [2021-11-25 18:50:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:17,886 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 2020 transitions. [2021-11-25 18:50:17,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:50:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2020 transitions. [2021-11-25 18:50:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 18:50:17,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:17,888 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:17,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:18,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-25 18:50:18,099 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting l0_destroyErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:50:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1813573682, now seen corresponding path program 1 times [2021-11-25 18:50:18,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:18,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824091798] [2021-11-25 18:50:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:18,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:18,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:50:18,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217696331] [2021-11-25 18:50:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:18,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:18,148 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:18,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-25 18:50:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:19,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:50:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-11-25 18:50:19,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:50:19,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:19,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824091798] [2021-11-25 18:50:19,274 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:50:19,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217696331] [2021-11-25 18:50:19,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217696331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:50:19,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:50:19,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:50:19,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689337293] [2021-11-25 18:50:19,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:50:19,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:50:19,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:50:19,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:50:19,276 INFO L87 Difference]: Start difference. First operand 1546 states and 2020 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:50:19,468 INFO L93 Difference]: Finished difference Result 1572 states and 1998 transitions. [2021-11-25 18:50:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:50:19,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 131 [2021-11-25 18:50:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:50:19,475 INFO L225 Difference]: With dead ends: 1572 [2021-11-25 18:50:19,475 INFO L226 Difference]: Without dead ends: 1572 [2021-11-25 18:50:19,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:50:19,476 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 269 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:50:19,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 721 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:50:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-11-25 18:50:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1540. [2021-11-25 18:50:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1345 states have (on average 1.3479553903345725) internal successors, (1813), 1401 states have internal predecessors, (1813), 89 states have call successors, (89), 46 states have call predecessors, (89), 48 states have return successors, (96), 92 states have call predecessors, (96), 89 states have call successors, (96) [2021-11-25 18:50:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 1998 transitions. [2021-11-25 18:50:19,503 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 1998 transitions. Word has length 131 [2021-11-25 18:50:19,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:50:19,503 INFO L470 AbstractCegarLoop]: Abstraction has 1540 states and 1998 transitions. [2021-11-25 18:50:19,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:50:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 1998 transitions. [2021-11-25 18:50:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 18:50:19,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:50:19,505 INFO L514 BasicCegarLoop]: trace histogram [56, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:50:19,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-25 18:50:19,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-25 18:50:19,719 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting l0_destroyErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 85 more)] === [2021-11-25 18:50:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:50:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1813577875, now seen corresponding path program 1 times [2021-11-25 18:50:19,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:50:19,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131123580] [2021-11-25 18:50:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:19,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:50:19,765 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:50:19,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939477595] [2021-11-25 18:50:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:50:19,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:50:19,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:50:19,769 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:50:19,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05108e23-7f94-4ede-ac0d-efda740bab99/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-25 18:50:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:50:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-25 18:50:20,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:50:21,038 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:50:21,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:50:22,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:50:22,173 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-25 18:50:22,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:50:22,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:50:22,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:22,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-25 18:50:22,329 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:50:22,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-11-25 18:50:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-25 18:50:22,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:50:22,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2021-11-25 18:50:31,664 WARN L227 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 34 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:50:53,246 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-11-25 18:50:53,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 20212 treesize of output 19480 [2021-11-25 18:50:54,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:50:54,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131123580] [2021-11-25 18:50:54,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:50:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939477595] [2021-11-25 18:50:54,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 18:50:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923074516] [2021-11-25 18:50:54,195 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2021-11-25 18:50:54,195 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:50:54,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:50:54,196 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:50:54,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:50:54,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:50:54,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:50:54,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:54,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:54,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:50:54,433 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:50:54,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2021-11-25 18:50:54,505 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 18:50:54,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2021-11-25 18:50:54,577 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:50:54,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 175 [2021-11-25 18:50:54,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:50:54,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:50:54,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:50:54,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:50:54,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:50:54,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:50:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:50:55,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:50:55,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:50:55,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:50:55,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:55,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:55,671 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:50:55,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:50:55,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:50:55,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:55,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:55,729 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:50:55,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:50:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:55,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:55,794 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:50:55,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:50:55,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:50:55,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:55,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:55,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:55,839 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:50:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:50:55,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:55,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:55,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:55,986 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:50:55,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 18:50:56,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:50:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,088 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-25 18:50:56,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:50:56,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:50:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,264 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-25 18:50:56,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 18:50:56,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,433 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:50:56,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 58 [2021-11-25 18:50:56,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,735 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:50:56,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 121 treesize of output 114 [2021-11-25 18:50:56,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:56,867 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-25 18:50:56,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 60 treesize of output 83 [2021-11-25 18:50:56,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:50:56,908 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:50:56,956 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:50:57,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:57,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:50:57,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:57,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:57,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,185 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:50:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:50:57,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:50:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:57,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,254 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:50:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 18:50:57,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:50:57,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:57,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,352 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 18:50:57,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:50:57,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:57,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,403 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 18:50:57,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 18:50:57,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:50:57,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:57,574 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-25 18:50:57,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-11-25 18:50:57,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:57,659 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-25 18:50:57,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-11-25 18:50:57,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:50:57,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:57,810 INFO L354 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2021-11-25 18:50:57,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 53 treesize of output 66 [2021-11-25 18:50:57,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:50:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:50:57,908 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 18:50:57,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 53 treesize of output 54 [2021-11-25 18:50:58,461 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:50:58,608 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-25 18:50:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:50:58,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:50:58,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:50:58,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:58,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:50:59,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:50:59,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:50:59,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:50:59,059 INFO L197 IcfgInterpreter]: Interpreting procedure l0_destroy with input of size 116 for LOIs [2021-11-25 18:51:00,803 INFO L180 IcfgInterpreter]: Interpretation finished