./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c533ab673c7ac44f09cf312108422da4b4eb94a047fb46aaa19b12fad5dce8e7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:00:24,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:00:24,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:00:24,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:00:24,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:00:24,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:00:24,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:00:24,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:00:24,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:00:24,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:00:24,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:00:24,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:00:24,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:00:24,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:00:24,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:00:24,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:00:24,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:00:24,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:00:24,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:00:24,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:00:24,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:00:24,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:00:24,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:00:24,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:00:24,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:00:24,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:00:24,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:00:24,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:00:24,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:00:24,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:00:24,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:00:24,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:00:24,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:00:24,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:00:24,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:00:24,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:00:24,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:00:24,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:00:24,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:00:24,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:00:24,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:00:24,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:00:24,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:00:24,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:00:24,461 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:00:24,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:00:24,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:00:24,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:00:24,464 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:00:24,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:00:24,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:00:24,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:00:24,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:00:24,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:00:24,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:00:24,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:00:24,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:00:24,468 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:00:24,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:00:24,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:00:24,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:00:24,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:00:24,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:00:24,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:00:24,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:00:24,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:00:24,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:00:24,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:00:24,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:00:24,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:00:24,472 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:00:24,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:00:24,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:00:24,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:00:24,475 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_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c533ab673c7ac44f09cf312108422da4b4eb94a047fb46aaa19b12fad5dce8e7 [2021-11-02 23:00:24,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:00:24,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:00:24,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:00:24,876 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:00:24,877 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:00:24,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i [2021-11-02 23:00:25,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/data/34d56b9d5/a1382b99d3264302a58263bf71f65749/FLAG8ee5b9af5 [2021-11-02 23:00:25,684 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:00:25,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i [2021-11-02 23:00:25,702 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/data/34d56b9d5/a1382b99d3264302a58263bf71f65749/FLAG8ee5b9af5 [2021-11-02 23:00:26,019 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/data/34d56b9d5/a1382b99d3264302a58263bf71f65749 [2021-11-02 23:00:26,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:00:26,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:00:26,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:00:26,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:00:26,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:00:26,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5752ba22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26, skipping insertion in model container [2021-11-02 23:00:26,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:00:26,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:00:26,235 WARN L228 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_d52a4eaa-9ecc-45e7-8039-01780337d619/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i[951,964] [2021-11-02 23:00:26,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:00:26,257 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:00:26,272 WARN L228 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_d52a4eaa-9ecc-45e7-8039-01780337d619/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i[951,964] [2021-11-02 23:00:26,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:00:26,293 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:00:26,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26 WrapperNode [2021-11-02 23:00:26,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:00:26,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:00:26,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:00:26,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:00:26,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:00:26,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:00:26,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:00:26,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:00:26,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:00:26,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:00:26,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:00:26,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:00:26,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (1/1) ... [2021-11-02 23:00:26,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:00:26,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:26,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:00:26,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:00:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:00:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:00:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:00:26,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:00:26,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:00:26,707 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-02 23:00:26,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:00:26 BoogieIcfgContainer [2021-11-02 23:00:26,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:00:26,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:00:26,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:00:26,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:00:26,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:00:26" (1/3) ... [2021-11-02 23:00:26,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c67129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:00:26, skipping insertion in model container [2021-11-02 23:00:26,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:26" (2/3) ... [2021-11-02 23:00:26,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c67129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:00:26, skipping insertion in model container [2021-11-02 23:00:26,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:00:26" (3/3) ... [2021-11-02 23:00:26,734 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound20.i [2021-11-02 23:00:26,740 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:00:26,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 23:00:26,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:00:26,847 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:00:26,857 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 23:00:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 23:00:26,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:26,892 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:26,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:26,907 INFO L85 PathProgramCache]: Analyzing trace with hash 119520859, now seen corresponding path program 1 times [2021-11-02 23:00:26,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:26,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056112443] [2021-11-02 23:00:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:26,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:27,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:27,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056112443] [2021-11-02 23:00:27,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056112443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:00:27,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:00:27,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:00:27,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821125189] [2021-11-02 23:00:27,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:00:27,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:27,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:00:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:00:27,142 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:27,158 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2021-11-02 23:00:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:00:27,159 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-02 23:00:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:27,167 INFO L225 Difference]: With dead ends: 37 [2021-11-02 23:00:27,168 INFO L226 Difference]: Without dead ends: 16 [2021-11-02 23:00:27,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:00:27,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-02 23:00:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-02 23:00:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-02 23:00:27,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-11-02 23:00:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:27,206 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-02 23:00:27,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-02 23:00:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 23:00:27,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:27,209 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:27,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:00:27,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:27,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1186643548, now seen corresponding path program 1 times [2021-11-02 23:00:27,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:27,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628456264] [2021-11-02 23:00:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:27,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:27,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:00:27,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96521774] [2021-11-02 23:00:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:27,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:27,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:27,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:00:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:00:27,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:27,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:27,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628456264] [2021-11-02 23:00:27,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:00:27,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96521774] [2021-11-02 23:00:27,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96521774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:00:27,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:00:27,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:00:27,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50805817] [2021-11-02 23:00:27,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:00:27,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:27,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:00:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:00:27,632 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:27,720 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-02 23:00:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:00:27,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-02 23:00:27,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:27,722 INFO L225 Difference]: With dead ends: 29 [2021-11-02 23:00:27,722 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 23:00:27,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:00:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 23:00:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-11-02 23:00:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-02 23:00:27,732 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2021-11-02 23:00:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:27,733 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-02 23:00:27,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-02 23:00:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:00:27,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:27,736 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:27,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:27,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:27,937 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2054849417, now seen corresponding path program 1 times [2021-11-02 23:00:27,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:27,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130088436] [2021-11-02 23:00:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:27,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:27,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:00:27,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931802232] [2021-11-02 23:00:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:27,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:27,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:27,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:00:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:28,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:00:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:28,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:28,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130088436] [2021-11-02 23:00:28,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:00:28,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931802232] [2021-11-02 23:00:28,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931802232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:28,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:00:28,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:00:28,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898886911] [2021-11-02 23:00:28,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:00:28,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:00:28,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:00:28,330 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:28,649 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-11-02 23:00:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:00:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 23:00:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:28,651 INFO L225 Difference]: With dead ends: 34 [2021-11-02 23:00:28,651 INFO L226 Difference]: Without dead ends: 28 [2021-11-02 23:00:28,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:00:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-02 23:00:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-11-02 23:00:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-02 23:00:28,657 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-11-02 23:00:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:28,658 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-02 23:00:28,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-02 23:00:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:00:28,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:28,659 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:28,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:28,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-02 23:00:28,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash -580289007, now seen corresponding path program 1 times [2021-11-02 23:00:28,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:28,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826211396] [2021-11-02 23:00:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:28,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:28,876 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:00:28,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402793580] [2021-11-02 23:00:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:28,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:28,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:28,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:28,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:00:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:00:28,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:29,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:29,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826211396] [2021-11-02 23:00:29,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:00:29,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402793580] [2021-11-02 23:00:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402793580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:00:29,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:00:29,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:00:29,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427198294] [2021-11-02 23:00:29,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:00:29,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:29,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:00:29,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:00:29,058 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:29,084 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-02 23:00:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:00:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 23:00:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:29,086 INFO L225 Difference]: With dead ends: 35 [2021-11-02 23:00:29,087 INFO L226 Difference]: Without dead ends: 22 [2021-11-02 23:00:29,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:00:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-02 23:00:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-02 23:00:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-02 23:00:29,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2021-11-02 23:00:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:29,099 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-02 23:00:29,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-02 23:00:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:00:29,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:29,101 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:29,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:29,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:29,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:29,312 INFO L85 PathProgramCache]: Analyzing trace with hash 505525932, now seen corresponding path program 1 times [2021-11-02 23:00:29,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:29,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391126129] [2021-11-02 23:00:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:29,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:29,327 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:00:29,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22957542] [2021-11-02 23:00:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:29,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:29,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:29,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:29,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d52a4eaa-9ecc-45e7-8039-01780337d619/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process