./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI --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 40ea744e34964af110b03a02fd30edb5f9eceb5eca9cf560d6cf7ef319b1e1e5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:33:27,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:33:27,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:33:27,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:33:27,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:33:27,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:33:27,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:33:27,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:33:27,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:33:27,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:33:27,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:33:27,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:33:27,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:33:27,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:33:27,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:33:27,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:33:27,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:33:27,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:33:27,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:33:27,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:33:27,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:33:27,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:33:27,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:33:27,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:33:27,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:33:27,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:33:27,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:33:27,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:33:27,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:33:27,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:33:27,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:33:27,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:33:27,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:33:27,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:33:27,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:33:27,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:33:27,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:33:27,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:33:27,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:33:27,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:33:27,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:33:27,654 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:33:27,715 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:33:27,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:33:27,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:33:27,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:33:27,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:33:27,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:33:27,717 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:33:27,717 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:33:27,717 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:33:27,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:33:27,718 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:33:27,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:33:27,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:33:27,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:33:27,718 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:33:27,719 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:33:27,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:33:27,719 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:33:27,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:33:27,720 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:33:27,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:33:27,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:33:27,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:33:27,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:33:27,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:33:27,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:33:27,721 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:33:27,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:33:27,721 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:33:27,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:33:27,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:33:27,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:33:27,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:33:27,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:33:27,725 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:33:27,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:33:27,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:33:27,727 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:33:27,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:33:27,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:33:27,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:33:27,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40ea744e34964af110b03a02fd30edb5f9eceb5eca9cf560d6cf7ef319b1e1e5 [2022-11-03 03:33:28,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:33:28,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:33:28,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:33:28,073 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:33:28,074 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:33:28,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/reducercommutativity/avg.i [2022-11-03 03:33:28,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/data/bc13ceb7f/55b49a0de35848438975c6915171f6ed/FLAGc2fe6b0a3 [2022-11-03 03:33:28,628 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:33:28,628 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/sv-benchmarks/c/reducercommutativity/avg.i [2022-11-03 03:33:28,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/data/bc13ceb7f/55b49a0de35848438975c6915171f6ed/FLAGc2fe6b0a3 [2022-11-03 03:33:29,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/data/bc13ceb7f/55b49a0de35848438975c6915171f6ed [2022-11-03 03:33:29,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:33:29,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:33:29,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:33:29,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:33:29,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:33:29,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e56d530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29, skipping insertion in model container [2022-11-03 03:33:29,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:33:29,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:33:29,432 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_b326569b-5c24-465b-afda-b44d77db4a57/sv-benchmarks/c/reducercommutativity/avg.i[1286,1299] [2022-11-03 03:33:29,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:33:29,454 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:33:29,505 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_b326569b-5c24-465b-afda-b44d77db4a57/sv-benchmarks/c/reducercommutativity/avg.i[1286,1299] [2022-11-03 03:33:29,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:33:29,528 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:33:29,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29 WrapperNode [2022-11-03 03:33:29,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:33:29,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:33:29,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:33:29,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:33:29,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,593 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-11-03 03:33:29,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:33:29,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:33:29,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:33:29,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:33:29,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,647 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:33:29,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:33:29,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:33:29,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:33:29,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (1/1) ... [2022-11-03 03:33:29,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:33:29,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:29,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:33:29,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:33:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:33:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:33:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:33:29,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:33:29,757 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-11-03 03:33:29,757 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-11-03 03:33:29,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:33:29,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:33:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:33:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:33:29,870 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:33:29,873 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:33:30,160 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:33:30,203 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:33:30,203 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 03:33:30,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:33:30 BoogieIcfgContainer [2022-11-03 03:33:30,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:33:30,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:33:30,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:33:30,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:33:30,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:33:29" (1/3) ... [2022-11-03 03:33:30,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d6dfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:33:30, skipping insertion in model container [2022-11-03 03:33:30,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:29" (2/3) ... [2022-11-03 03:33:30,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d6dfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:33:30, skipping insertion in model container [2022-11-03 03:33:30,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:33:30" (3/3) ... [2022-11-03 03:33:30,230 INFO L112 eAbstractionObserver]: Analyzing ICFG avg.i [2022-11-03 03:33:30,278 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:33:30,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:33:30,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:33:30,396 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@42a0a798, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:33:30,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:33:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-11-03 03:33:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:33:30,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:30,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:30,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:30,449 INFO L85 PathProgramCache]: Analyzing trace with hash 377830400, now seen corresponding path program 1 times [2022-11-03 03:33:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:30,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027745885] [2022-11-03 03:33:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:30,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:30,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:33:30,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655599202] [2022-11-03 03:33:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:30,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:30,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:30,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:30,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:33:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:33:30,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:33:31,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:31,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027745885] [2022-11-03 03:33:31,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:33:31,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655599202] [2022-11-03 03:33:31,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655599202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:31,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:31,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:33:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793870552] [2022-11-03 03:33:31,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:31,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:33:31,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:31,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:33:31,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:31,073 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:33:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:31,182 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-03 03:33:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:33:31,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-11-03 03:33:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:31,199 INFO L225 Difference]: With dead ends: 36 [2022-11-03 03:33:31,200 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 03:33:31,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:31,209 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:31,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 03:33:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 03:33:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:33:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-03 03:33:31,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 20 [2022-11-03 03:33:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:31,263 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-03 03:33:31,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:33:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-03 03:33:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:33:31,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:31,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:31,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:31,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 03:33:31,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:31,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1280243607, now seen corresponding path program 1 times [2022-11-03 03:33:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:31,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500248832] [2022-11-03 03:33:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:31,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:31,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:33:31,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276099275] [2022-11-03 03:33:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:31,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:31,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:31,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:31,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:33:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:31,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:33:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:33:31,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:33:31,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500248832] [2022-11-03 03:33:31,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:33:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276099275] [2022-11-03 03:33:31,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276099275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:31,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1250098620] [2022-11-03 03:33:31,941 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:33:31,942 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:31,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:31,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:31,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:32,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,136 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-03 03:33:32,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2022-11-03 03:33:32,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,204 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:33:32,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:33:32,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:32,686 INFO L356 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-03 03:33:32,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 465 treesize of output 447 [2022-11-03 03:33:33,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:33,205 INFO L390 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 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 03:33:33,480 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 80 for LOIs [2022-11-03 03:33:33,526 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:49,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '296#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= ~N~0 1) (= |#NULL.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 ~N~0) 0)) (< v_avg_~ret~0_BEFORE_RETURN_5 0)) (ite (< ~N~0 0) (+ (- 1) (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0) 1)) (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 ~N~0) 0)) (< v_avg_~ret~0_BEFORE_RETURN_5 0)) (ite (< ~N~0 0) (+ (- 1) (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0) 1)) (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0)) 4294967296) (+ (- 4294967296) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 ~N~0) 0)) (< v_avg_~ret~0_BEFORE_RETURN_5 0)) (ite (< ~N~0 0) (+ (- 1) (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0) 1)) (div v_avg_~ret~0_BEFORE_RETURN_5 ~N~0)) 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:49,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:49,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:33:49,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2022-11-03 03:33:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619794283] [2022-11-03 03:33:49,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:49,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:33:49,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:49,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:33:49,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=333, Unknown=2, NotChecked=0, Total=420 [2022-11-03 03:33:49,613 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 03:33:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:49,712 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2022-11-03 03:33:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:33:49,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 23 [2022-11-03 03:33:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:49,714 INFO L225 Difference]: With dead ends: 30 [2022-11-03 03:33:49,714 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 03:33:49,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=85, Invalid=333, Unknown=2, NotChecked=0, Total=420 [2022-11-03 03:33:49,716 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:49,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 03:33:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 03:33:49,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:33:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-03 03:33:49,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 23 [2022-11-03 03:33:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:49,724 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-03 03:33:49,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 03:33:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-03 03:33:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:33:49,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:49,726 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:49,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 03:33:49,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:49,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:49,941 INFO L85 PathProgramCache]: Analyzing trace with hash 472081056, now seen corresponding path program 2 times [2022-11-03 03:33:49,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:49,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430287472] [2022-11-03 03:33:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:49,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:49,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:33:49,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001769193] [2022-11-03 03:33:49,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:33:49,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:49,967 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:49,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:33:50,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:33:50,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:33:50,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:33:50,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:50,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:50,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430287472] [2022-11-03 03:33:50,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:33:50,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001769193] [2022-11-03 03:33:50,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001769193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:50,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:50,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:33:50,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941945290] [2022-11-03 03:33:50,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:50,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:33:50,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:50,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:33:50,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:50,102 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:33:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:50,195 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-03 03:33:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:33:50,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-11-03 03:33:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:50,196 INFO L225 Difference]: With dead ends: 28 [2022-11-03 03:33:50,197 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 03:33:50,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:50,198 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:50,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 03:33:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-03 03:33:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2022-11-03 03:33:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-03 03:33:50,204 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 26 [2022-11-03 03:33:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:50,206 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-03 03:33:50,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:33:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-03 03:33:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:33:50,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:50,207 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:50,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:50,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:50,422 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1744019670, now seen corresponding path program 1 times [2022-11-03 03:33:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:50,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646572057] [2022-11-03 03:33:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:50,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:50,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:33:50,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841143172] [2022-11-03 03:33:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:50,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:50,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:50,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:50,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b326569b-5c24-465b-afda-b44d77db4a57/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:33:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:50,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 03:33:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:56,188 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:56,189 INFO L390 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 1 case distinctions, treesize of input 269 treesize of output 139 [2022-11-03 03:34:23,564 WARN L234 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:23,641 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:23,641 INFO L390 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 1 case distinctions, treesize of input 509 treesize of output 264 [2022-11-03 03:34:33,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:33,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:33,154 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:33,155 INFO L390 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 1 case distinctions, treesize of input 418 treesize of output 276 [2022-11-03 03:34:46,917 WARN L234 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:48,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:48,506 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:48,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 751 treesize of output 370 [2022-11-03 03:35:02,894 WARN L234 SmtUtils]: Spent 9.27s on a formula simplification. DAG size of input: 67 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:35:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:35:09,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:58,724 WARN L234 SmtUtils]: Spent 10.25s on a formula simplification. DAG size of input: 101 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:49,358 WARN L234 SmtUtils]: Spent 26.92s on a formula simplification. DAG size of input: 151 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:38:42,915 WARN L234 SmtUtils]: Spent 18.22s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:41:37,997 WARN L234 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 185 DAG size of output: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:42:56,015 WARN L234 SmtUtils]: Spent 40.34s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:44:02,334 WARN L234 SmtUtils]: Spent 25.89s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:44:42,093 WARN L234 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:44:42,959 INFO L390 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 7537 treesize of output 6009 [2022-11-03 03:44:43,420 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:44:43,420 INFO L390 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 6761 treesize of output 5045