./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array20_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array20_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4595fcce7ed27c87f4b36557925b67d85fd0fff83d482c199564b06ae0d3b884 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:40,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:40,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:40,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:40,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:40,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:40,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:40,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:40,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:40,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:40,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:40,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:40,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:40,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:40,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:40,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:40,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:40,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:40,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:40,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:40,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:40,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:40,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:40,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:40,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:40,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:40,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:40,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:40,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:40,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:40,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:40,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:40,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:40,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:40,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:40,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:40,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:40,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:40,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:40,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:40,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:40,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:59:40,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:40,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:40,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:40,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:40,670 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:40,671 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:40,671 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:40,671 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:59:40,671 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:40,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:40,672 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:59:40,672 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:59:40,672 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:40,672 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:59:40,672 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:59:40,673 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:59:40,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:40,674 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:59:40,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:59:40,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:59:40,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:40,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:40,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:40,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:40,675 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:40,675 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:59:40,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:40,676 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:40,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:40,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:40,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:40,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:40,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:40,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:40,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:40,677 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:59:40,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:59:40,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:40,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:40,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:40,678 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_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4595fcce7ed27c87f4b36557925b67d85fd0fff83d482c199564b06ae0d3b884 [2021-11-19 13:59:40,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:40,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:41,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:41,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:41,003 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:41,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/array-patterns/array20_pattern.c [2021-11-19 13:59:41,090 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/data/c505165f1/38beca8d0cc14a04b953acd02c7162f2/FLAG6b87e6a49 [2021-11-19 13:59:41,703 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:41,704 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/sv-benchmarks/c/array-patterns/array20_pattern.c [2021-11-19 13:59:41,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/data/c505165f1/38beca8d0cc14a04b953acd02c7162f2/FLAG6b87e6a49 [2021-11-19 13:59:41,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/data/c505165f1/38beca8d0cc14a04b953acd02c7162f2 [2021-11-19 13:59:41,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:41,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:41,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:41,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:41,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:41,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:41" (1/1) ... [2021-11-19 13:59:41,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ce8b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:41, skipping insertion in model container [2021-11-19 13:59:41,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:41" (1/1) ... [2021-11-19 13:59:41,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:41,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:41,937 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/sv-benchmarks/c/array-patterns/array20_pattern.c[1444,1457] [2021-11-19 13:59:41,963 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:41,970 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:59:41,983 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/sv-benchmarks/c/array-patterns/array20_pattern.c[1444,1457] [2021-11-19 13:59:41,996 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:42,009 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:59:42,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42 WrapperNode [2021-11-19 13:59:42,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:42,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:42,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:59:42,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:59:42,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,090 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-11-19 13:59:42,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:42,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:59:42,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:59:42,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:59:42,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:59:42,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:59:42,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:59:42,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:59:42,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (1/1) ... [2021-11-19 13:59:42,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:42,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:42,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:59:42,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:59:42,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:59:42,221 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 13:59:42,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 13:59:42,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:59:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:59:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 13:59:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:59:42,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:59:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 13:59:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:59:42,290 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:59:42,291 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:59:42,481 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:59:42,565 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:59:42,565 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-19 13:59:42,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:42 BoogieIcfgContainer [2021-11-19 13:59:42,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:59:42,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:59:42,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:59:42,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:59:42,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:59:41" (1/3) ... [2021-11-19 13:59:42,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a76e43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:42, skipping insertion in model container [2021-11-19 13:59:42,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:42" (2/3) ... [2021-11-19 13:59:42,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a76e43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:42, skipping insertion in model container [2021-11-19 13:59:42,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:42" (3/3) ... [2021-11-19 13:59:42,583 INFO L111 eAbstractionObserver]: Analyzing ICFG array20_pattern.c [2021-11-19 13:59:42,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:59:42,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:59:42,676 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:59:42,684 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:59:42,684 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:59:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 13:59:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 13:59:42,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:42,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:42,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1984863423, now seen corresponding path program 1 times [2021-11-19 13:59:42,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:42,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199541625] [2021-11-19 13:59:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:42,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:42,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:59:42,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956826627] [2021-11-19 13:59:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:42,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:42,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:42,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:59:42,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:59:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:42,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:59:42,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:43,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:43,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:43,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199541625] [2021-11-19 13:59:43,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:59:43,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956826627] [2021-11-19 13:59:43,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956826627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:43,070 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:43,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:59:43,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142273410] [2021-11-19 13:59:43,090 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:43,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:59:43,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:43,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:59:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:59:43,126 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 13:59:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:43,167 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2021-11-19 13:59:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:59:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-19 13:59:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:43,177 INFO L225 Difference]: With dead ends: 28 [2021-11-19 13:59:43,177 INFO L226 Difference]: Without dead ends: 18 [2021-11-19 13:59:43,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:59:43,185 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:43,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-19 13:59:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-19 13:59:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 13:59:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-19 13:59:43,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-19 13:59:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:43,226 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-19 13:59:43,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 13:59:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-19 13:59:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 13:59:43,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:43,228 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:43,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:43,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-19 13:59:43,450 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash -600046686, now seen corresponding path program 1 times [2021-11-19 13:59:43,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:43,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135606855] [2021-11-19 13:59:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:43,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:43,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:59:43,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988022888] [2021-11-19 13:59:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:43,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:43,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:43,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:59:43,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 13:59:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:43,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:59:43,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:59:43,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:59:43,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:43,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135606855] [2021-11-19 13:59:43,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:59:43,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988022888] [2021-11-19 13:59:43,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988022888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:43,884 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:43,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:59:43,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877656759] [2021-11-19 13:59:43,885 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:43,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:59:43,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:59:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:59:43,887 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 13:59:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:43,952 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2021-11-19 13:59:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19 [2021-11-19 13:59:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:43,954 INFO L225 Difference]: With dead ends: 23 [2021-11-19 13:59:43,955 INFO L226 Difference]: Without dead ends: 20 [2021-11-19 13:59:43,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:43,960 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:43,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 43 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-19 13:59:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-19 13:59:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 13:59:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-11-19 13:59:43,979 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 19 [2021-11-19 13:59:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:43,979 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-11-19 13:59:43,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 13:59:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-11-19 13:59:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:59:43,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:43,983 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:44,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:44,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:44,204 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:44,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:44,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2027418289, now seen corresponding path program 1 times [2021-11-19 13:59:44,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:44,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348857713] [2021-11-19 13:59:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:44,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:44,221 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:59:44,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352464263] [2021-11-19 13:59:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:44,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:44,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:59:44,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 13:59:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:59:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:59:44,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:59:44,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:44,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348857713] [2021-11-19 13:59:44,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:59:44,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352464263] [2021-11-19 13:59:44,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352464263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:44,508 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:44,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 13:59:44,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933733574] [2021-11-19 13:59:44,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:44,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:59:44,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:59:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:44,511 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:59:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:44,714 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-11-19 13:59:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:59:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 22 [2021-11-19 13:59:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:44,716 INFO L225 Difference]: With dead ends: 41 [2021-11-19 13:59:44,716 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 13:59:44,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:44,718 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:44,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 13:59:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-19 13:59:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 13:59:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-11-19 13:59:44,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 22 [2021-11-19 13:59:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:44,729 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-11-19 13:59:44,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:59:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-11-19 13:59:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 13:59:44,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:44,734 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:44,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:44,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:44,960 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash 802022805, now seen corresponding path program 1 times [2021-11-19 13:59:44,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:44,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653258414] [2021-11-19 13:59:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:44,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:44,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:59:44,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101091520] [2021-11-19 13:59:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:44,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:44,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:44,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:59:44,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 13:59:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:45,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:59:45,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 13:59:45,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 13:59:45,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:59:45,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653258414] [2021-11-19 13:59:45,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:59:45,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101091520] [2021-11-19 13:59:45,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101091520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:45,191 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:45,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:59:45,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227818945] [2021-11-19 13:59:45,191 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:45,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:59:45,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:59:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:59:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:59:45,194 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:59:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:45,276 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-19 13:59:45,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:45,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2021-11-19 13:59:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:45,286 INFO L225 Difference]: With dead ends: 40 [2021-11-19 13:59:45,286 INFO L226 Difference]: Without dead ends: 23 [2021-11-19 13:59:45,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:45,291 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:45,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 41 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-19 13:59:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-19 13:59:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 13:59:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-19 13:59:45,310 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 24 [2021-11-19 13:59:45,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:45,310 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-19 13:59:45,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:59:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-19 13:59:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 13:59:45,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:45,314 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:45,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:45,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:45,533 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1969151575, now seen corresponding path program 1 times [2021-11-19 13:59:45,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:59:45,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727137941] [2021-11-19 13:59:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:45,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:59:45,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:59:45,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5443094] [2021-11-19 13:59:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:45,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:45,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:45,547 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:59:45,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5470aa61-fab0-48d1-8946-54e85c34ea13/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 13:59:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:45,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 13:59:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:45,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-19 13:59:45,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-19 13:59:47,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 16 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 17 new quantified variables, introduced 0 case distinctions, treesize of input 2443 treesize of output 2393 [2021-11-19 14:01:13,646 WARN L227 SmtUtils]: Spent 1.43m on a formula simplification. DAG size of input: 2599 DAG size of output: 248 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 14:01:13,650 INFO L354 Elim1Store]: treesize reduction 78762, result has 2.6 percent of original size [2021-11-19 14:01:13,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 16 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 408 case distinctions, treesize of input 3553 treesize of output 4757 [2021-11-19 14:01:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 149 [2021-11-19 14:01:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 140 [2021-11-19 14:01:16,354 INFO L354 Elim1Store]: treesize reduction 1068, result has 0.7 percent of original size [2021-11-19 14:01:16,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 3448 treesize of output 3206 [2021-11-19 14:01:16,688 INFO L354 Elim1Store]: treesize reduction 718, result has 0.4 percent of original size [2021-11-19 14:01:16,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3177 treesize of output 2969 [2021-11-19 14:01:16,971 INFO L354 Elim1Store]: treesize reduction 738, result has 0.4 percent of original size [2021-11-19 14:01:16,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2921 treesize of output 2776 [2021-11-19 14:01:17,104 INFO L354 Elim1Store]: treesize reduction 504, result has 0.2 percent of original size [2021-11-19 14:01:17,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2657 treesize of output 2485 [2021-11-19 14:01:17,201 INFO L354 Elim1Store]: treesize reduction 516, result has 0.2 percent of original size [2021-11-19 14:01:17,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2392 treesize of output 2263 [2021-11-19 14:01:17,238 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 14:01:17,278 INFO L354 Elim1Store]: treesize reduction 528, result has 0.2 percent of original size [2021-11-19 14:01:17,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2119 treesize of output 1906 [2021-11-19 14:01:17,980 INFO L354 Elim1Store]: treesize reduction 763, result has 0.4 percent of original size [2021-11-19 14:01:17,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1846 treesize of output 1628 [2021-11-19 14:01:18,225 INFO L354 Elim1Store]: treesize reduction 743, result has 0.4 percent of original size [2021-11-19 14:01:18,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1579 treesize of output 1296 [2021-11-19 14:01:18,273 INFO L354 Elim1Store]: treesize reduction 500, result has 0.2 percent of original size [2021-11-19 14:01:18,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1308 treesize of output 1127 [2021-11-19 14:01:18,399 INFO L354 Elim1Store]: treesize reduction 778, result has 0.4 percent of original size [2021-11-19 14:01:18,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1042 treesize of output 723 [2021-11-19 14:01:18,413 INFO L883 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 14:01:18,455 INFO L354 Elim1Store]: treesize reduction 480, result has 0.2 percent of original size [2021-11-19 14:01:18,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 756 treesize of output 636 [2021-11-19 14:01:18,487 INFO L354 Elim1Store]: treesize reduction 508, result has 0.2 percent of original size [2021-11-19 14:01:18,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 502 treesize of output 320 [2021-11-19 14:01:18,613 INFO L354 Elim1Store]: treesize reduction 452, result has 0.2 percent of original size [2021-11-19 14:01:18,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 255 treesize of output 117 [2021-11-19 14:01:19,097 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-19 14:01:19,098 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 41 [2021-11-19 14:01:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:01:19,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:36,876 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 5 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 14:09:06,879 WARN L227 SmtUtils]: Spent 39.39s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)