./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD --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 2e2cde485588a76ffd9007a3156c09bf9b7ea2f13bf08ca050cf52c24b8b1e9f ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:23:36,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:23:36,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:23:36,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:23:36,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:23:36,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:23:36,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:23:36,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:23:36,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:23:36,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:23:36,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:23:36,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:23:36,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:23:36,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:23:36,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:23:36,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:23:36,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:23:36,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:23:36,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:23:36,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:23:36,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:23:36,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:23:36,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:23:36,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:23:36,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:23:36,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:23:36,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:23:36,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:23:36,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:23:36,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:23:36,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:23:36,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:23:36,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:23:36,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:23:36,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:23:36,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:23:36,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:23:36,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:23:36,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:23:36,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:23:36,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:23:36,982 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:23:37,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:23:37,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:23:37,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:23:37,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:23:37,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:23:37,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:23:37,032 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:23:37,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:23:37,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:23:37,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:23:37,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:23:37,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:23:37,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:23:37,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:23:37,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:23:37,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:23:37,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:23:37,036 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:23:37,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:23:37,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:23:37,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:23:37,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:23:37,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:23:37,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:23:37,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:23:37,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:23:37,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:23:37,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:23:37,038 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:23:37,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:23:37,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:23:37,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:23:37,041 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_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e2cde485588a76ffd9007a3156c09bf9b7ea2f13bf08ca050cf52c24b8b1e9f [2021-10-28 23:23:37,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:23:37,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:23:37,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:23:37,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:23:37,368 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:23:37,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2021-10-28 23:23:37,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/data/5af13dd1d/6a12d09dd1ba47948646b6ece9e59211/FLAG9f4d6a048 [2021-10-28 23:23:37,906 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:23:37,908 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2021-10-28 23:23:37,919 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/data/5af13dd1d/6a12d09dd1ba47948646b6ece9e59211/FLAG9f4d6a048 [2021-10-28 23:23:38,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/data/5af13dd1d/6a12d09dd1ba47948646b6ece9e59211 [2021-10-28 23:23:38,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:23:38,280 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:23:38,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:23:38,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:23:38,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:23:38,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736eb718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38, skipping insertion in model container [2021-10-28 23:23:38,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:23:38,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:23:38,499 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_04c5f37a-85fa-49bf-8938-c372093aba20/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537] [2021-10-28 23:23:38,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:23:38,523 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:23:38,535 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_04c5f37a-85fa-49bf-8938-c372093aba20/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537] [2021-10-28 23:23:38,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:23:38,555 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:23:38,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38 WrapperNode [2021-10-28 23:23:38,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:23:38,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:23:38,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:23:38,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:23:38,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:23:38,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:23:38,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:23:38,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:23:38,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:23:38,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:23:38,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:23:38,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:23:38,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (1/1) ... [2021-10-28 23:23:38,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:23:38,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:38,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:23:38,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:23:38,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:23:38,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:23:38,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:23:38,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:23:39,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:23:39,005 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-28 23:23:39,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:23:39 BoogieIcfgContainer [2021-10-28 23:23:39,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:23:39,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:23:39,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:23:39,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:23:39,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:23:38" (1/3) ... [2021-10-28 23:23:39,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3083ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:23:39, skipping insertion in model container [2021-10-28 23:23:39,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:23:38" (2/3) ... [2021-10-28 23:23:39,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3083ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:23:39, skipping insertion in model container [2021-10-28 23:23:39,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:23:39" (3/3) ... [2021-10-28 23:23:39,015 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound2.c [2021-10-28 23:23:39,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:23:39,021 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 23:23:39,067 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:23:39,073 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 [2021-10-28 23:23:39,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 23:23:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 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) [2021-10-28 23:23:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:23:39,110 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:39,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:39,112 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-10-28 23:23:39,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:39,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455724548] [2021-10-28 23:23:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:39,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:39,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:39,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271536524] [2021-10-28 23:23:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:39,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:39,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:39,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:39,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:23:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:23:39,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 23:23:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:39,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:39,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455724548] [2021-10-28 23:23:39,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:39,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271536524] [2021-10-28 23:23:39,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271536524] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:23:39,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:23:39,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:23:39,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777051534] [2021-10-28 23:23:39,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:23:39,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:23:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:23:39,467 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-28 23:23:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:39,483 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-28 23:23:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:23:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-10-28 23:23:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:39,494 INFO L225 Difference]: With dead ends: 39 [2021-10-28 23:23:39,494 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 23:23:39,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:23:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 23:23:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-28 23:23:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-10-28 23:23:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-28 23:23:39,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-10-28 23:23:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:39,539 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-28 23:23:39,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-28 23:23:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-28 23:23:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:23:39,547 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:39,547 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:39,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:39,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-28 23:23:39,771 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-28 23:23:39,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:39,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789156658] [2021-10-28 23:23:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:39,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:39,795 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:39,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037563408] [2021-10-28 23:23:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:39,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:39,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:39,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:39,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:23:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:23:39,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:23:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:40,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:40,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789156658] [2021-10-28 23:23:40,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:40,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037563408] [2021-10-28 23:23:40,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037563408] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:23:40,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:23:40,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:23:40,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315998134] [2021-10-28 23:23:40,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:23:40,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:23:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:23:40,232 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-28 23:23:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:47,780 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-10-28 23:23:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:23:47,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-28 23:23:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:47,781 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:23:47,782 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 23:23:47,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:23:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 23:23:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-10-28 23:23:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-10-28 23:23:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-28 23:23:47,788 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2021-10-28 23:23:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:47,788 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-28 23:23:47,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-28 23:23:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-28 23:23:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:23:47,789 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:47,789 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:47,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-28 23:23:47,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-28 23:23:47,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:47,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:47,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-10-28 23:23:47,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:47,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074544447] [2021-10-28 23:23:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:47,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:48,019 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:48,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921789692] [2021-10-28 23:23:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:48,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:48,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:48,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:48,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:23:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:23:48,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:23:48,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:48,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:48,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074544447] [2021-10-28 23:23:48,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:48,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921789692] [2021-10-28 23:23:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921789692] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:23:48,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:23:48,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:23:48,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558199962] [2021-10-28 23:23:48,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:23:48,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:23:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:23:48,180 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-10-28 23:23:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:48,191 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-28 23:23:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:23:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2021-10-28 23:23:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:48,195 INFO L225 Difference]: With dead ends: 24 [2021-10-28 23:23:48,195 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 23:23:48,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:23:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 23:23:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-28 23:23:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2021-10-28 23:23:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-28 23:23:48,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-10-28 23:23:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:48,200 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-28 23:23:48,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-10-28 23:23:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-28 23:23:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:23:48,201 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:48,202 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:48,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:48,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:48,403 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:48,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-10-28 23:23:48,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:48,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108920670] [2021-10-28 23:23:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:48,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:48,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:48,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501190406] [2021-10-28 23:23:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:48,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:48,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:48,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:23:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:23:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:23:48,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:48,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:48,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108920670] [2021-10-28 23:23:48,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:48,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501190406] [2021-10-28 23:23:48,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501190406] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:23:48,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:23:48,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:23:48,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065508241] [2021-10-28 23:23:48,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:23:48,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:23:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:23:48,737 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2021-10-28 23:23:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:49,018 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-28 23:23:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:23:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 [2021-10-28 23:23:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:49,019 INFO L225 Difference]: With dead ends: 24 [2021-10-28 23:23:49,019 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 23:23:49,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:23:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 23:23:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-28 23:23:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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) [2021-10-28 23:23:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-28 23:23:49,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-10-28 23:23:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:49,024 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-28 23:23:49,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2021-10-28 23:23:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-28 23:23:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:23:49,026 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:49,026 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:49,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-28 23:23:49,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:49,243 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2021-10-28 23:23:49,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:49,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595256803] [2021-10-28 23:23:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:49,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:49,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:49,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504643025] [2021-10-28 23:23:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:49,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:49,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:49,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:49,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:23:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:23:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:23:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:49,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:49,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595256803] [2021-10-28 23:23:49,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:49,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504643025] [2021-10-28 23:23:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504643025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:49,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:49,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 23:23:49,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962748581] [2021-10-28 23:23:49,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:23:49,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:23:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:23:49,384 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-10-28 23:23:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:49,412 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-28 23:23:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:23:49,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-10-28 23:23:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:49,414 INFO L225 Difference]: With dead ends: 26 [2021-10-28 23:23:49,414 INFO L226 Difference]: Without dead ends: 22 [2021-10-28 23:23:49,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:23:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-28 23:23:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-28 23:23:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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) [2021-10-28 23:23:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-28 23:23:49,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-10-28 23:23:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:49,419 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-28 23:23:49,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-10-28 23:23:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-28 23:23:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:23:49,420 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:49,420 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:49,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:49,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:49,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2021-10-28 23:23:49,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:49,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385830546] [2021-10-28 23:23:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:49,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:49,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:49,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170478486] [2021-10-28 23:23:49,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:23:49,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:49,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:49,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:49,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:23:49,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:23:49,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 23:23:49,793 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:23:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:23:49,839 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:23:49,839 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:23:49,840 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:23:49,842 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:23:49,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:50,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:50,050 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-10-28 23:23:50,054 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:23:50,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:23:50 BoogieIcfgContainer [2021-10-28 23:23:50,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:23:50,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:23:50,096 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:23:50,096 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:23:50,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:23:39" (3/4) ... [2021-10-28 23:23:50,099 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:23:50,181 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:23:50,181 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:23:50,183 INFO L168 Benchmark]: Toolchain (without parser) took 11901.65 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 59.4 MB in the beginning and 91.6 MB in the end (delta: -32.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:50,184 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory was 65.4 MB in the beginning and 65.4 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:23:50,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.51 ms. Allocated memory is still 94.4 MB. Free memory was 59.2 MB in the beginning and 69.3 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:50,185 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.60 ms. Allocated memory is still 94.4 MB. Free memory was 69.3 MB in the beginning and 67.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:23:50,185 INFO L168 Benchmark]: Boogie Preprocessor took 32.38 ms. Allocated memory is still 94.4 MB. Free memory was 67.7 MB in the beginning and 66.8 MB in the end (delta: 895.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:50,186 INFO L168 Benchmark]: RCFGBuilder took 364.29 ms. Allocated memory is still 94.4 MB. Free memory was 66.5 MB in the beginning and 56.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:50,187 INFO L168 Benchmark]: TraceAbstraction took 11087.18 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 56.4 MB in the beginning and 93.7 MB in the end (delta: -37.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:50,187 INFO L168 Benchmark]: Witness Printer took 85.59 ms. Allocated memory is still 144.7 MB. Free memory was 93.7 MB in the beginning and 91.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:23:50,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory was 65.4 MB in the beginning and 65.4 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.51 ms. Allocated memory is still 94.4 MB. Free memory was 59.2 MB in the beginning and 69.3 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.60 ms. Allocated memory is still 94.4 MB. Free memory was 69.3 MB in the beginning and 67.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.38 ms. Allocated memory is still 94.4 MB. Free memory was 67.7 MB in the beginning and 66.8 MB in the end (delta: 895.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 364.29 ms. Allocated memory is still 94.4 MB. Free memory was 66.5 MB in the beginning and 56.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11087.18 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 56.4 MB in the beginning and 93.7 MB in the end (delta: -37.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 85.59 ms. Allocated memory is still 144.7 MB. Free memory was 93.7 MB in the beginning and 91.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L9] COND FALSE !(!cond) VAL [counter=0] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(r != 0)) VAL [counter=2] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND FALSE !(counter++<2) [L12] COND TRUE !(cond) VAL [counter=3] [L14] reach_error() VAL [counter=3] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 10.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 80 SDtfs, 36 SDslu, 102 SDs, 0 SdLazy, 66 SolverSat, 16 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 7.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=5, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 243 SizeOfPredicates, 14 NumberOfNonLiveVariables, 364 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:23:50,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c5f37a-85fa-49bf-8938-c372093aba20/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...