./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/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_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bor5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/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_f4cc676a-feae-4265-a829-54ae00ed3efd/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 1a4987addfe5f74a2ffcc1ac07d342e5a630d26b982b6fa887540d0e2c4f5965 --- 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 03:53:12,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:53:12,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:53:12,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:53:12,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:53:12,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:53:12,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:53:12,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:53:12,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:53:12,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:53:12,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:53:12,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:53:12,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:53:12,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:53:12,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:53:12,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:53:12,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:53:12,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:53:12,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:53:12,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:53:12,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:53:12,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:53:12,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:53:12,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:53:12,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:53:12,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:53:12,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:53:12,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:53:12,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:53:12,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:53:12,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:53:12,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:53:12,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:53:12,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:53:12,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:53:12,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:53:12,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:53:12,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:53:12,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:53:12,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:53:12,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:53:12,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:53:12,385 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:53:12,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:53:12,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:53:12,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:53:12,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:53:12,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:53:12,391 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:53:12,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:53:12,391 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:53:12,392 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:53:12,393 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:53:12,393 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:53:12,393 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:53:12,394 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:53:12,394 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:53:12,394 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:53:12,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:53:12,395 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:53:12,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:53:12,396 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:53:12,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:53:12,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:53:12,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:53:12,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:53:12,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:53:12,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:53:12,397 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:53:12,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:53:12,398 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:53:12,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:53:12,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:53:12,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:53:12,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:53:12,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:53:12,400 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:53:12,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:53:12,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:53:12,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:53:12,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:53:12,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:53:12,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:53:12,403 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_f4cc676a-feae-4265-a829-54ae00ed3efd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a4987addfe5f74a2ffcc1ac07d342e5a630d26b982b6fa887540d0e2c4f5965 [2022-11-03 03:53:12,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:53:12,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:53:12,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:53:12,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:53:12,773 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:53:12,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-crafted/bor5.i [2022-11-03 03:53:12,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/data/6b513d107/513eb55fe737486aac92715c2ba69205/FLAGb95286ec8 [2022-11-03 03:53:13,360 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:53:13,363 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/sv-benchmarks/c/array-crafted/bor5.i [2022-11-03 03:53:13,371 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/data/6b513d107/513eb55fe737486aac92715c2ba69205/FLAGb95286ec8 [2022-11-03 03:53:13,734 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/data/6b513d107/513eb55fe737486aac92715c2ba69205 [2022-11-03 03:53:13,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:53:13,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:53:13,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:53:13,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:53:13,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:53:13,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:13" (1/1) ... [2022-11-03 03:53:13,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a964180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:13, skipping insertion in model container [2022-11-03 03:53:13,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:13" (1/1) ... [2022-11-03 03:53:13,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:53:13,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:53:13,986 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_f4cc676a-feae-4265-a829-54ae00ed3efd/sv-benchmarks/c/array-crafted/bor5.i[1364,1377] [2022-11-03 03:53:13,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:53:13,996 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:53:14,034 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_f4cc676a-feae-4265-a829-54ae00ed3efd/sv-benchmarks/c/array-crafted/bor5.i[1364,1377] [2022-11-03 03:53:14,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:53:14,055 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:53:14,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14 WrapperNode [2022-11-03 03:53:14,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:53:14,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:53:14,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:53:14,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:53:14,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,104 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-03 03:53:14,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:53:14,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:53:14,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:53:14,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:53:14,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,130 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:53:14,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:53:14,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:53:14,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:53:14,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (1/1) ... [2022-11-03 03:53:14,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:53:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:14,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:53:14,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-11-03 03:53:14,208 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-11-03 03:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:53:14,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:53:14,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:53:14,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:53:14,282 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:53:14,284 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:53:14,437 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:53:14,475 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:53:14,475 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 03:53:14,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:14 BoogieIcfgContainer [2022-11-03 03:53:14,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:53:14,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:53:14,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:53:14,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:53:14,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:53:13" (1/3) ... [2022-11-03 03:53:14,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d7b7cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:14, skipping insertion in model container [2022-11-03 03:53:14,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:14" (2/3) ... [2022-11-03 03:53:14,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d7b7cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:14, skipping insertion in model container [2022-11-03 03:53:14,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:14" (3/3) ... [2022-11-03 03:53:14,486 INFO L112 eAbstractionObserver]: Analyzing ICFG bor5.i [2022-11-03 03:53:14,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:53:14,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:53:14,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:53:14,603 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;@62492465, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:53:14,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:53:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 03:53:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:53:14,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:14,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:14,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash 885304965, now seen corresponding path program 1 times [2022-11-03 03:53:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:14,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403506322] [2022-11-03 03:53:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:14,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:53:15,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403506322] [2022-11-03 03:53:15,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403506322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:15,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522698967] [2022-11-03 03:53:15,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:15,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:15,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:15,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:15,274 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 03:53:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:15,343 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-03 03:53:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:15,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2022-11-03 03:53:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:15,354 INFO L225 Difference]: With dead ends: 36 [2022-11-03 03:53:15,354 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 03:53:15,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:15,361 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:15,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:53:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 03:53:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 03:53:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 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 03:53:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 03:53:15,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-03 03:53:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:15,412 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 03:53:15,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 03:53:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 03:53:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 03:53:15,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:15,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:15,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:53:15,419 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 261202112, now seen corresponding path program 1 times [2022-11-03 03:53:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:15,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615814670] [2022-11-03 03:53:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:15,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:53:15,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:15,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615814670] [2022-11-03 03:53:15,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615814670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:53:15,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518815286] [2022-11-03 03:53:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:15,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:15,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:15,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:53:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:15,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:53:15,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:53:15,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518815286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:15,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561341778] [2022-11-03 03:53:15,923 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:53:15,924 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:53:15,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:53:15,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:53:15,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:53:16,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,088 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:53:16,089 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 03:53:16,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2022-11-03 03:53:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 03:53:16,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,430 INFO L356 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-03 03:53:16,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 304 treesize of output 285 [2022-11-03 03:53:16,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-03 03:53:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,602 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 0 case distinctions, treesize of input 58 treesize of output 36 [2022-11-03 03:53:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:16,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:53:16,673 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 0 case distinctions, treesize of input 86 treesize of output 57 [2022-11-03 03:53:16,800 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 17 for LOIs [2022-11-03 03:53:16,806 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:53:18,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '237#(and (= |ULTIMATE.start_main_~ret2~0#1| (ite (<= (mod |ULTIMATE.start_main_~temp~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~temp~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~temp~0#1| 4294967296) (- 4294967296)))) (= (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|) (= |ULTIMATE.start_main_~ret~0#1| (ite (<= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 4 |ULTIMATE.start_main_~#x~0#1.offset|)) 4294967296) 2147483647) (mod (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 4 |ULTIMATE.start_main_~#x~0#1.offset|)) 4294967296) (+ (mod (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 4 |ULTIMATE.start_main_~#x~0#1.offset|)) 4294967296) (- 4294967296)))) (<= 1 ~N~0) (= |ULTIMATE.start_main_~i~2#1| 0) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= ~N~0 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= ~N~0 (+ |ULTIMATE.start_main_~i~2#1| 1)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) |ULTIMATE.start_main_~#x~0#1.offset|) 4294967296) 2147483647) (mod (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) |ULTIMATE.start_main_~#x~0#1.offset|) 4294967296) (+ (mod (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) |ULTIMATE.start_main_~#x~0#1.offset|) 4294967296) (- 4294967296)))))' at error location [2022-11-03 03:53:18,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:53:18,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:53:18,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-03 03:53:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195712951] [2022-11-03 03:53:18,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:18,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:53:18,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:18,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:53:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:53:18,211 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:53:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:18,320 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2022-11-03 03:53:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:53:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 22 [2022-11-03 03:53:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:18,323 INFO L225 Difference]: With dead ends: 32 [2022-11-03 03:53:18,324 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 03:53:18,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:53:18,330 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:18,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 03:53:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-03 03:53:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 03:53:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-03 03:53:18,341 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 22 [2022-11-03 03:53:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:18,342 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-03 03:53:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:53:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-03 03:53:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:53:18,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:18,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:18,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 03:53:18,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1463802437, now seen corresponding path program 1 times [2022-11-03 03:53:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:18,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730763011] [2022-11-03 03:53:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:53:18,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:18,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730763011] [2022-11-03 03:53:18,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730763011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:18,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:18,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:53:18,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890048013] [2022-11-03 03:53:18,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:18,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:18,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:18,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:53:18,745 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:53:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:18,776 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-03 03:53:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:53:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-11-03 03:53:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:18,778 INFO L225 Difference]: With dead ends: 29 [2022-11-03 03:53:18,778 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 03:53:18,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 03:53:18,780 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:18,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:53:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 03:53:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-03 03:53:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2022-11-03 03:53:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-03 03:53:18,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2022-11-03 03:53:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:18,787 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-03 03:53:18,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:53:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-03 03:53:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:53:18,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:18,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:18,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:53:18,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1425393076, now seen corresponding path program 1 times [2022-11-03 03:53:18,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:18,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492394906] [2022-11-03 03:53:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:18,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:53:18,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:53:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:53:18,928 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:53:18,929 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:53:18,930 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:53:18,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:53:18,935 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-03 03:53:18,938 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:53:19,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:53:19 BoogieIcfgContainer [2022-11-03 03:53:19,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:53:19,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:53:19,011 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:53:19,011 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:53:19,013 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:14" (3/4) ... [2022-11-03 03:53:19,016 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:53:19,016 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:53:19,017 INFO L158 Benchmark]: Toolchain (without parser) took 5279.05ms. Allocated memory was 92.3MB in the beginning and 161.5MB in the end (delta: 69.2MB). Free memory was 59.1MB in the beginning and 97.3MB in the end (delta: -38.2MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. [2022-11-03 03:53:19,017 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 47.5MB in the beginning and 47.4MB in the end (delta: 39.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:53:19,020 INFO L158 Benchmark]: CACSL2BoogieTranslator took 316.50ms. Allocated memory is still 92.3MB. Free memory was 58.9MB in the beginning and 68.0MB in the end (delta: -9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:53:19,020 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.41ms. Allocated memory is still 92.3MB. Free memory was 68.0MB in the beginning and 66.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:53:19,021 INFO L158 Benchmark]: Boogie Preprocessor took 27.56ms. Allocated memory is still 92.3MB. Free memory was 66.3MB in the beginning and 65.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:53:19,023 INFO L158 Benchmark]: RCFGBuilder took 344.09ms. Allocated memory is still 92.3MB. Free memory was 65.0MB in the beginning and 50.6MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:53:19,027 INFO L158 Benchmark]: TraceAbstraction took 4530.33ms. Allocated memory was 92.3MB in the beginning and 161.5MB in the end (delta: 69.2MB). Free memory was 49.9MB in the beginning and 97.3MB in the end (delta: -47.4MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2022-11-03 03:53:19,027 INFO L158 Benchmark]: Witness Printer took 5.89ms. Allocated memory is still 161.5MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:53:19,029 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 47.5MB in the beginning and 47.4MB in the end (delta: 39.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 316.50ms. Allocated memory is still 92.3MB. Free memory was 58.9MB in the beginning and 68.0MB in the end (delta: -9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.41ms. Allocated memory is still 92.3MB. Free memory was 68.0MB in the beginning and 66.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.56ms. Allocated memory is still 92.3MB. Free memory was 66.3MB in the beginning and 65.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 344.09ms. Allocated memory is still 92.3MB. Free memory was 65.0MB in the beginning and 50.6MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4530.33ms. Allocated memory was 92.3MB in the beginning and 161.5MB in the end (delta: 69.2MB). Free memory was 49.9MB in the beginning and 97.3MB in the end (delta: -47.4MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. * Witness Printer took 5.89ms. Allocated memory is still 161.5MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 25. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [i=0, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=1, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=2, N=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [i=2, N=2, x={9:0}] [L45] CALL, EXPR bor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=1, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res | x[i] [L24] i++ VAL [i=2, N=2, res=1, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) [L27] return res; [L45] RET, EXPR bor(x) VAL [bor(x)=1, i=2, N=2, x={9:0}] [L45] ret = bor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [i=2, N=2, ret=1, temp=1, x={9:0}] [L48] CALL, EXPR bor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-3, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res | x[i] [L24] i++ VAL [i=2, N=2, res=4294967295, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) [L27] return res; [L48] RET, EXPR bor(x) VAL [bor(x)=-1, i=2, N=2, ret=1, temp=1, x={9:0}] [L48] ret2 = bor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [i=2, i=0, N=2, ret=1, ret2=-1, temp=-3, x={9:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/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 -> 1a4987addfe5f74a2ffcc1ac07d342e5a630d26b982b6fa887540d0e2c4f5965 [2022-11-03 03:53:22,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:53:22,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:53:22,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:53:22,038 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:53:22,039 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:53:22,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-crafted/bor5.i [2022-11-03 03:53:22,106 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/data/24a9d7cd8/ae395e12ddc24296b6a52b0c9de678bb/FLAG3b036155b [2022-11-03 03:53:22,611 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:53:22,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/sv-benchmarks/c/array-crafted/bor5.i [2022-11-03 03:53:22,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/data/24a9d7cd8/ae395e12ddc24296b6a52b0c9de678bb/FLAG3b036155b [2022-11-03 03:53:22,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/data/24a9d7cd8/ae395e12ddc24296b6a52b0c9de678bb [2022-11-03 03:53:22,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:53:22,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:53:22,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:53:22,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:53:22,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:53:22,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:22" (1/1) ... [2022-11-03 03:53:22,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6840beba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:22, skipping insertion in model container [2022-11-03 03:53:22,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:22" (1/1) ... [2022-11-03 03:53:22,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:53:23,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:53:23,193 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_f4cc676a-feae-4265-a829-54ae00ed3efd/sv-benchmarks/c/array-crafted/bor5.i[1364,1377] [2022-11-03 03:53:23,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:53:23,206 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:53:23,261 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_f4cc676a-feae-4265-a829-54ae00ed3efd/sv-benchmarks/c/array-crafted/bor5.i[1364,1377] [2022-11-03 03:53:23,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:53:23,295 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:53:23,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23 WrapperNode [2022-11-03 03:53:23,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:53:23,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:53:23,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:53:23,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:53:23,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,356 INFO L138 Inliner]: procedures = 18, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2022-11-03 03:53:23,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:53:23,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:53:23,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:53:23,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:53:23,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:53:23,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:53:23,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:53:23,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:53:23,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (1/1) ... [2022-11-03 03:53:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:53:23,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:23,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:53:23,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:53:23,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:53:23,494 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-11-03 03:53:23,494 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-11-03 03:53:23,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:53:23,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:53:23,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 03:53:23,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:53:23,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:53:23,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:53:23,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 03:53:23,570 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:53:23,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:53:23,826 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:53:23,837 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:53:23,837 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 03:53:23,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:23 BoogieIcfgContainer [2022-11-03 03:53:23,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:53:23,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:53:23,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:53:23,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:53:23,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:53:22" (1/3) ... [2022-11-03 03:53:23,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518b8e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:23, skipping insertion in model container [2022-11-03 03:53:23,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:23" (2/3) ... [2022-11-03 03:53:23,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518b8e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:23, skipping insertion in model container [2022-11-03 03:53:23,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:23" (3/3) ... [2022-11-03 03:53:23,863 INFO L112 eAbstractionObserver]: Analyzing ICFG bor5.i [2022-11-03 03:53:23,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:53:23,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:53:23,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:53:24,005 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;@3c5fd075, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:53:24,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:53:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 03:53:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 03:53:24,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:24,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:24,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash 310067850, now seen corresponding path program 1 times [2022-11-03 03:53:24,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:24,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482233094] [2022-11-03 03:53:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:24,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:24,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:24,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:24,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:53:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 03:53:24,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:53:24,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:24,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482233094] [2022-11-03 03:53:24,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482233094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:24,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:24,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:53:24,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792047602] [2022-11-03 03:53:24,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:24,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:53:24,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:53:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:53:24,308 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 03:53:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:24,333 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-11-03 03:53:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:53:24,335 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 29 [2022-11-03 03:53:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:24,342 INFO L225 Difference]: With dead ends: 51 [2022-11-03 03:53:24,343 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 03:53:24,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:53:24,362 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:24,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:53:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 03:53:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 03:53:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2022-11-03 03:53:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-03 03:53:24,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2022-11-03 03:53:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:24,404 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-03 03:53:24,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 03:53:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-03 03:53:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 03:53:24,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:24,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:24,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:24,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:24,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1979244726, now seen corresponding path program 1 times [2022-11-03 03:53:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:24,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556805531] [2022-11-03 03:53:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:24,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:24,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:24,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:24,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:53:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:24,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:53:24,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:24,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:24,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556805531] [2022-11-03 03:53:24,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556805531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:24,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:24,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210780918] [2022-11-03 03:53:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:24,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:24,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:24,791 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 03:53:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:24,839 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-03 03:53:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-03 03:53:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:24,841 INFO L225 Difference]: With dead ends: 43 [2022-11-03 03:53:24,841 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 03:53:24,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:24,843 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:24,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:53:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 03:53:24,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-03 03:53:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2022-11-03 03:53:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-03 03:53:24,850 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2022-11-03 03:53:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:24,850 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-03 03:53:24,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 03:53:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-03 03:53:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 03:53:24,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:24,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:24,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:25,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:25,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash -789530644, now seen corresponding path program 1 times [2022-11-03 03:53:25,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:25,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061888252] [2022-11-03 03:53:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:25,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:25,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:25,076 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:25,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:53:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:53:25,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:53:25,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061888252] [2022-11-03 03:53:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061888252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [390488530] [2022-11-03 03:53:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:25,317 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:25,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:25,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:25,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 03:53:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:53:25,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:53:25,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [390488530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:25,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606548141] [2022-11-03 03:53:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:25,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:25,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:25,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:25,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:53:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:25,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:53:25,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:25,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606548141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:25,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:53:25,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4] total 8 [2022-11-03 03:53:25,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857393444] [2022-11-03 03:53:25,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:25,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:25,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:25,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:53:25,735 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 03:53:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:25,819 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-11-03 03:53:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:53:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 31 [2022-11-03 03:53:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:25,821 INFO L225 Difference]: With dead ends: 43 [2022-11-03 03:53:25,821 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 03:53:25,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:53:25,827 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:25,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 03:53:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-03 03:53:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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 03:53:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-03 03:53:25,854 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 31 [2022-11-03 03:53:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:25,854 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-03 03:53:25,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 03:53:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-03 03:53:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 03:53:25,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:25,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:25,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:26,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:26,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:26,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:26,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1364622826, now seen corresponding path program 1 times [2022-11-03 03:53:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918626093] [2022-11-03 03:53:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:26,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:26,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:26,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:26,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:53:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:26,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:53:26,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:53:26,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:26,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918626093] [2022-11-03 03:53:26,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918626093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:26,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [470098381] [2022-11-03 03:53:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:26,691 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:26,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:26,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:26,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 03:53:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:26,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:26,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:53:26,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:53:26,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [470098381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057746481] [2022-11-03 03:53:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:26,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:26,942 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:26,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:53:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:27,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:53:27,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:53:27,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057746481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:27,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:27,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-11-03 03:53:27,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613879181] [2022-11-03 03:53:27,077 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:53:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:53:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:53:27,081 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:53:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:27,150 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-11-03 03:53:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:53:27,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2022-11-03 03:53:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:27,152 INFO L225 Difference]: With dead ends: 47 [2022-11-03 03:53:27,152 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 03:53:27,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:53:27,153 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:27,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 57 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 03:53:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-03 03:53:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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 03:53:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-03 03:53:27,158 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 37 [2022-11-03 03:53:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:27,159 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-03 03:53:27,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:53:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-03 03:53:27,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:53:27,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:27,160 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:27,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:27,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:27,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:27,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:27,779 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:27,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:27,779 INFO L85 PathProgramCache]: Analyzing trace with hash 343299212, now seen corresponding path program 2 times [2022-11-03 03:53:27,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398590448] [2022-11-03 03:53:27,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:53:27,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:27,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:27,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:53:27,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:53:27,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:53:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:53:27,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:27,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:27,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398590448] [2022-11-03 03:53:27,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398590448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:27,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:27,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:53:27,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652908157] [2022-11-03 03:53:27,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:27,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:27,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:27,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:53:27,961 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 03:53:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:28,031 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-03 03:53:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:53:28,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 39 [2022-11-03 03:53:28,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:28,034 INFO L225 Difference]: With dead ends: 42 [2022-11-03 03:53:28,034 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 03:53:28,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 03:53:28,035 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:28,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 03:53:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-03 03:53:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 03:53:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-03 03:53:28,040 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2022-11-03 03:53:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:28,043 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-03 03:53:28,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 03:53:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-03 03:53:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:53:28,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:28,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:28,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:28,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:28,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1487527882, now seen corresponding path program 1 times [2022-11-03 03:53:28,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:28,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109946950] [2022-11-03 03:53:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:28,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:28,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:28,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:28,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:53:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:28,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:53:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:28,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:29,002 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:29,003 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 45 treesize of output 25 [2022-11-03 03:53:29,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:29,354 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:29,354 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 61 treesize of output 36 [2022-11-03 03:53:29,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:29,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:53:29,536 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:29,537 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 58 treesize of output 48 [2022-11-03 03:53:29,832 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:29,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 49 treesize of output 25 [2022-11-03 03:53:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:53:29,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:32,588 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 111 treesize of output 87 [2022-11-03 03:53:32,605 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:32,606 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 90 treesize of output 66 [2022-11-03 03:53:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:53:36,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109946950] [2022-11-03 03:53:36,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109946950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1476158598] [2022-11-03 03:53:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:36,001 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:36,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:36,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 03:53:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:53:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:36,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:36,521 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:36,521 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 45 treesize of output 25 [2022-11-03 03:53:36,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:36,706 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:36,706 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 61 treesize of output 36 [2022-11-03 03:53:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:36,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:53:36,847 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:36,847 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 58 treesize of output 48 [2022-11-03 03:53:36,917 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:36,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 49 treesize of output 25 [2022-11-03 03:53:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:53:36,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:37,809 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 111 treesize of output 87 [2022-11-03 03:53:37,815 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:37,815 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 90 treesize of output 66 [2022-11-03 03:53:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:53:40,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1476158598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:40,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809437074] [2022-11-03 03:53:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:40,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:40,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:40,654 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:40,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:53:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 03:53:40,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:41,279 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:41,279 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 45 treesize of output 25 [2022-11-03 03:53:41,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:53:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:41,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:41,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:53:41,797 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-03 03:53:41,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 59 [2022-11-03 03:53:42,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:53:42,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:53:42,433 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:42,433 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 58 treesize of output 48 [2022-11-03 03:53:42,503 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:53:42,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 49 treesize of output 25 [2022-11-03 03:53:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:53:42,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:17,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809437074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:17,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:17,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 21, 23, 16, 15] total 54 [2022-11-03 03:54:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491866882] [2022-11-03 03:54:17,643 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:17,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 03:54:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:17,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 03:54:17,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2587, Unknown=11, NotChecked=0, Total=2862 [2022-11-03 03:54:17,645 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 54 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 43 states have internal predecessors, (78), 10 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-03 03:54:20,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:22,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:28,679 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2022-11-03 03:54:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 03:54:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 43 states have internal predecessors, (78), 10 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 41 [2022-11-03 03:54:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:28,684 INFO L225 Difference]: With dead ends: 98 [2022-11-03 03:54:28,685 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 03:54:28,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 183 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=603, Invalid=4642, Unknown=11, NotChecked=0, Total=5256 [2022-11-03 03:54:28,688 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 107 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:28,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 122 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1020 Invalid, 2 Unknown, 166 Unchecked, 7.1s Time] [2022-11-03 03:54:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 03:54:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-11-03 03:54:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 9 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-03 03:54:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2022-11-03 03:54:28,718 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 41 [2022-11-03 03:54:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:28,719 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2022-11-03 03:54:28,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 43 states have internal predecessors, (78), 10 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-03 03:54:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2022-11-03 03:54:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 03:54:28,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:28,721 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:28,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:28,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:29,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:29,325 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 380877448, now seen corresponding path program 2 times [2022-11-03 03:54:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972878245] [2022-11-03 03:54:29,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:29,328 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:29,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:54:29,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:54:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:54:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:54:30,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972878245] [2022-11-03 03:54:30,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972878245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:30,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [829416441] [2022-11-03 03:54:30,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:30,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:30,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:30,207 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:30,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 03:54:30,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:30,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:54:30,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:54:30,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:54:30,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [829416441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:30,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591745994] [2022-11-03 03:54:30,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:30,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:30,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:30,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:54:30,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:30,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:54:30,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:54:31,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:54:31,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591745994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:31,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:31,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8, 9, 8, 11] total 30 [2022-11-03 03:54:31,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774006001] [2022-11-03 03:54:31,581 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:31,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:54:31,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:31,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:54:31,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:54:31,584 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 30 states have internal predecessors, (101), 5 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-03 03:54:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:34,257 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2022-11-03 03:54:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 03:54:34,259 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 30 states have internal predecessors, (101), 5 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 43 [2022-11-03 03:54:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:34,260 INFO L225 Difference]: With dead ends: 150 [2022-11-03 03:54:34,260 INFO L226 Difference]: Without dead ends: 94 [2022-11-03 03:54:34,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=523, Invalid=2339, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 03:54:34,262 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 265 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:34,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 222 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:54:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-03 03:54:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2022-11-03 03:54:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.171875) internal successors, (75), 65 states have internal predecessors, (75), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-03 03:54:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-11-03 03:54:34,277 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 43 [2022-11-03 03:54:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:34,277 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-11-03 03:54:34,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 30 states have internal predecessors, (101), 5 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-03 03:54:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-11-03 03:54:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:54:34,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:34,279 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:34,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:34,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-03 03:54:34,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-03 03:54:34,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:34,882 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:34,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:34,883 INFO L85 PathProgramCache]: Analyzing trace with hash -46110550, now seen corresponding path program 3 times [2022-11-03 03:54:34,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:34,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683467303] [2022-11-03 03:54:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:54:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:34,884 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:34,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:54:35,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:54:35,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:54:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:54:35,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:54:35,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:35,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683467303] [2022-11-03 03:54:35,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683467303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:35,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [198754444] [2022-11-03 03:54:35,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:54:35,435 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:35,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:35,438 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:35,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 03:54:35,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:54:35,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:35,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:54:35,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:54:35,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:54:35,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [198754444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:35,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859430094] [2022-11-03 03:54:35,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:54:35,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:35,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:35,815 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:35,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:54:35,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:54:35,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:35,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:54:35,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:54:36,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:54:36,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859430094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:36,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:36,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 10, 11] total 27 [2022-11-03 03:54:36,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844565518] [2022-11-03 03:54:36,889 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:36,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:54:36,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:54:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:54:36,891 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 03:54:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:37,800 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2022-11-03 03:54:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:54:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 45 [2022-11-03 03:54:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:37,802 INFO L225 Difference]: With dead ends: 132 [2022-11-03 03:54:37,803 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 03:54:37,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2022-11-03 03:54:37,804 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 185 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:37,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 144 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:54:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 03:54:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2022-11-03 03:54:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 77 states have internal predecessors, (86), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-03 03:54:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-11-03 03:54:37,832 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 45 [2022-11-03 03:54:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:37,832 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-11-03 03:54:37,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 03:54:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-11-03 03:54:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 03:54:37,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:37,841 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:37,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:38,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:38,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:38,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:38,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:38,456 INFO L85 PathProgramCache]: Analyzing trace with hash 715974184, now seen corresponding path program 4 times [2022-11-03 03:54:38,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:38,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942369836] [2022-11-03 03:54:38,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:54:38,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:38,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:38,458 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:38,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4cc676a-feae-4265-a829-54ae00ed3efd/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:54:38,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:54:38,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:38,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 03:54:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:38,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 03:54:39,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:39,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:39,416 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:54:39,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2022-11-03 03:54:39,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:39,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:39,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:39,902 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-03 03:54:39,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2022-11-03 03:54:40,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:40,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:40,201 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:54:40,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2022-11-03 03:54:40,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:40,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:40,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:40,405 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:54:40,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 03:54:41,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:54:41,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 34 [2022-11-03 03:54:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:54:41,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:17,966 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 348 treesize of output 306 [2022-11-03 03:55:18,017 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:55:18,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4414 treesize of output 3218