./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/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_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa --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 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:28:37,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:28:37,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:28:37,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:28:37,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:28:37,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:28:37,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:28:37,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:28:37,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:28:37,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:28:37,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:28:37,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:28:37,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:28:37,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:28:37,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:28:37,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:28:37,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:28:37,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:28:37,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:28:37,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:28:37,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:28:37,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:28:37,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:28:37,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:28:37,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:28:37,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:28:37,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:28:37,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:28:37,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:28:37,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:28:37,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:28:37,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:28:37,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:28:37,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:28:37,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:28:37,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:28:37,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:28:37,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:28:37,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:28:37,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:28:37,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:28:37,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:28:37,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:28:37,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:28:37,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:28:37,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:28:37,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:28:37,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:28:37,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:28:37,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:28:37,775 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:28:37,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:28:37,776 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:28:37,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:28:37,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:28:37,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:28:37,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:28:37,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:28:37,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:28:37,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:28:37,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:28:37,777 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:28:37,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:28:37,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:28:37,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:28:37,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:28:37,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:28:37,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:28:37,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:28:37,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:28:37,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:28:37,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:28:37,778 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:28:37,779 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:28:37,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:28:37,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:28:37,779 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_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e2cde485588a76ffd9007a3156c09bf9b7ea2f13bf08ca050cf52c24b8b1e9f [2021-12-07 00:28:37,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:28:37,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:28:37,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:28:37,999 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:28:37,999 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:28:38,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2021-12-07 00:28:38,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/data/0cf2fdb99/479d328ecec24201b8f387bdd1fb772e/FLAG9ce2d9fd6 [2021-12-07 00:28:38,394 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:28:38,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2021-12-07 00:28:38,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/data/0cf2fdb99/479d328ecec24201b8f387bdd1fb772e/FLAG9ce2d9fd6 [2021-12-07 00:28:38,409 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/data/0cf2fdb99/479d328ecec24201b8f387bdd1fb772e [2021-12-07 00:28:38,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:28:38,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:28:38,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:28:38,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:28:38,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:28:38,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ace5c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38, skipping insertion in model container [2021-12-07 00:28:38,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:28:38,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:28:38,556 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537] [2021-12-07 00:28:38,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:28:38,579 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:28:38,591 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537] [2021-12-07 00:28:38,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:28:38,605 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:28:38,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38 WrapperNode [2021-12-07 00:28:38,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:28:38,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:28:38,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:28:38,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:28:38,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,631 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2021-12-07 00:28:38,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:28:38,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:28:38,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:28:38,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:28:38,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:28:38,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:28:38,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:28:38,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:28:38,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (1/1) ... [2021-12-07 00:28:38,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:28:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:38,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:28:38,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:28:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:28:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 00:28:38,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 00:28:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:28:38,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:28:38,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:28:38,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 00:28:38,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 00:28:38,754 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:28:38,756 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:28:38,834 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:28:38,838 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:28:38,838 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:28:38,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:28:38 BoogieIcfgContainer [2021-12-07 00:28:38,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:28:38,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:28:38,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:28:38,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:28:38,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:28:38" (1/3) ... [2021-12-07 00:28:38,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b80c694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:28:38, skipping insertion in model container [2021-12-07 00:28:38,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:38" (2/3) ... [2021-12-07 00:28:38,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b80c694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:28:38, skipping insertion in model container [2021-12-07 00:28:38,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:28:38" (3/3) ... [2021-12-07 00:28:38,848 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound2.c [2021-12-07 00:28:38,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:28:38,853 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:28:38,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:28:38,909 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 [2021-12-07 00:28:38,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:28:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:28:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 00:28:38,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:38,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:38,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2021-12-07 00:28:38,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:38,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072910380] [2021-12-07 00:28:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:38,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:39,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:39,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235296776] [2021-12-07 00:28:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:39,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:39,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:39,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:28:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 00:28:39,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:28:39,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:28:39,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072910380] [2021-12-07 00:28:39,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:28:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235296776] [2021-12-07 00:28:39,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235296776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:28:39,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:28:39,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:28:39,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355594187] [2021-12-07 00:28:39,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:28:39,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:28:39,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:39,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:28:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:28:39,167 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:28:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:39,182 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-12-07 00:28:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:28:39,184 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-07 00:28:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:39,191 INFO L225 Difference]: With dead ends: 47 [2021-12-07 00:28:39,191 INFO L226 Difference]: Without dead ends: 21 [2021-12-07 00:28:39,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:28:39,197 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:39,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:28:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-07 00:28:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-07 00:28:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:28:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-07 00:28:39,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2021-12-07 00:28:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:39,224 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-07 00:28:39,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:28:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-07 00:28:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:28:39,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:39,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:39,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:28:39,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-07 00:28:39,429 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:39,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2021-12-07 00:28:39,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:39,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36734841] [2021-12-07 00:28:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:39,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:39,469 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:39,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397047217] [2021-12-07 00:28:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:39,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:39,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:39,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:39,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:28:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:28:39,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:28:39,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:28:39,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36734841] [2021-12-07 00:28:39,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:28:39,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397047217] [2021-12-07 00:28:39,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397047217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:28:39,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:28:39,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:28:39,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477539206] [2021-12-07 00:28:39,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:28:39,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:28:39,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:28:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:28:39,628 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:28:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:39,639 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-07 00:28:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:28:39,639 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-07 00:28:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:39,640 INFO L225 Difference]: With dead ends: 30 [2021-12-07 00:28:39,640 INFO L226 Difference]: Without dead ends: 23 [2021-12-07 00:28:39,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:28:39,642 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:39,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:28:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-07 00:28:39,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-07 00:28:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:28:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-07 00:28:39,647 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2021-12-07 00:28:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:39,648 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-07 00:28:39,648 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:28:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-07 00:28:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:28:39,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:39,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:39,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:28:39,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:39,851 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2021-12-07 00:28:39,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:39,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726340497] [2021-12-07 00:28:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:39,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:39,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727308023] [2021-12-07 00:28:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:39,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:39,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:39,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:39,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:28:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:28:40,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:28:40,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:28:40,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:40,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726340497] [2021-12-07 00:28:40,141 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:28:40,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727308023] [2021-12-07 00:28:40,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727308023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:28:40,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:28:40,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:28:40,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333006562] [2021-12-07 00:28:40,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:28:40,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:28:40,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:40,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:28:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:28:40,143 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:28:41,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:28:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:41,634 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-12-07 00:28:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:28:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-07 00:28:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:41,635 INFO L225 Difference]: With dead ends: 35 [2021-12-07 00:28:41,635 INFO L226 Difference]: Without dead ends: 33 [2021-12-07 00:28:41,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:28:41,636 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:41,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 00:28:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-07 00:28:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-07 00:28:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:28:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-07 00:28:41,642 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2021-12-07 00:28:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:41,642 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-07 00:28:41,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:28:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-07 00:28:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:28:41,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:41,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:41,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:28:41,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-07 00:28:41,845 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2021-12-07 00:28:41,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:41,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556220417] [2021-12-07 00:28:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:41,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:41,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:41,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011774773] [2021-12-07 00:28:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:41,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:41,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:41,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:41,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:28:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:41,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:28:41,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:28:41,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:28:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:28:42,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556220417] [2021-12-07 00:28:42,104 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:28:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011774773] [2021-12-07 00:28:42,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011774773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:28:42,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:28:42,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-07 00:28:42,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124823061] [2021-12-07 00:28:42,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:28:42,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:28:42,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:28:42,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:28:42,106 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:28:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:42,185 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-07 00:28:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:28:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2021-12-07 00:28:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:42,186 INFO L225 Difference]: With dead ends: 39 [2021-12-07 00:28:42,186 INFO L226 Difference]: Without dead ends: 34 [2021-12-07 00:28:42,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:28:42,188 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:42,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:28:42,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-07 00:28:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-12-07 00:28:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:28:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-12-07 00:28:42,193 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2021-12-07 00:28:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:42,193 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-12-07 00:28:42,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:28:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-12-07 00:28:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 00:28:42,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:42,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:42,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:28:42,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:42,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2021-12-07 00:28:42,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:42,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389494307] [2021-12-07 00:28:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:42,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:42,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:42,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485425975] [2021-12-07 00:28:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:42,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:42,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:42,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:42,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:28:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:42,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:28:42,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:28:42,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:28:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:28:42,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:42,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389494307] [2021-12-07 00:28:42,560 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:28:42,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485425975] [2021-12-07 00:28:42,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485425975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:28:42,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:28:42,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-12-07 00:28:42,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904844448] [2021-12-07 00:28:42,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:28:42,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:28:42,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:42,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:28:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:28:42,562 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:28:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:42,584 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-07 00:28:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:28:42,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2021-12-07 00:28:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:42,585 INFO L225 Difference]: With dead ends: 39 [2021-12-07 00:28:42,585 INFO L226 Difference]: Without dead ends: 34 [2021-12-07 00:28:42,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:28:42,586 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:42,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:28:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-07 00:28:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-07 00:28:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:28:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-12-07 00:28:42,592 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2021-12-07 00:28:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:42,592 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-12-07 00:28:42,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:28:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-12-07 00:28:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 00:28:42,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:42,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:42,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:28:42,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:42,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2051896210, now seen corresponding path program 2 times [2021-12-07 00:28:42,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:42,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749261619] [2021-12-07 00:28:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:42,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:42,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:42,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986631678] [2021-12-07 00:28:42,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:28:42,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:42,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:42,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:42,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:28:42,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:28:42,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-12-07 00:28:42,878 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 00:28:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 00:28:42,901 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 00:28:42,902 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-07 00:28:42,902 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-07 00:28:42,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:28:43,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:43,114 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-12-07 00:28:43,122 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 00:28:43,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:28:43 BoogieIcfgContainer [2021-12-07 00:28:43,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 00:28:43,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 00:28:43,168 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 00:28:43,168 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 00:28:43,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:28:38" (3/4) ... [2021-12-07 00:28:43,169 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-07 00:28:43,200 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-07 00:28:43,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 00:28:43,201 INFO L158 Benchmark]: Toolchain (without parser) took 4788.31ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 75.4MB in the beginning and 87.5MB in the end (delta: -12.0MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. [2021-12-07 00:28:43,201 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:28:43,201 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.95ms. Allocated memory is still 113.2MB. Free memory was 75.2MB in the beginning and 89.6MB in the end (delta: -14.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 00:28:43,201 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.20ms. Allocated memory is still 113.2MB. Free memory was 89.6MB in the beginning and 87.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:28:43,202 INFO L158 Benchmark]: Boogie Preprocessor took 14.35ms. Allocated memory is still 113.2MB. Free memory was 87.9MB in the beginning and 86.9MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-07 00:28:43,202 INFO L158 Benchmark]: RCFGBuilder took 193.88ms. Allocated memory is still 113.2MB. Free memory was 86.9MB in the beginning and 77.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-07 00:28:43,202 INFO L158 Benchmark]: TraceAbstraction took 4325.70ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 76.4MB in the beginning and 90.6MB in the end (delta: -14.2MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-12-07 00:28:43,203 INFO L158 Benchmark]: Witness Printer took 32.88ms. Allocated memory is still 136.3MB. Free memory was 90.6MB in the beginning and 87.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-07 00:28:43,204 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.95ms. Allocated memory is still 113.2MB. Free memory was 75.2MB in the beginning and 89.6MB in the end (delta: -14.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.20ms. Allocated memory is still 113.2MB. Free memory was 89.6MB in the beginning and 87.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.35ms. Allocated memory is still 113.2MB. Free memory was 87.9MB in the beginning and 86.9MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 193.88ms. Allocated memory is still 113.2MB. Free memory was 86.9MB in the beginning and 77.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4325.70ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 76.4MB in the beginning and 90.6MB in the end (delta: -14.2MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Witness Printer took 32.88ms. Allocated memory is still 136.3MB. Free memory was 90.6MB in the beginning and 87.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [A=11, counter=0, R=4] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [A=11, counter=0, R=4] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [A=11, counter=0, R=4, r=5, u=9, v=1] [L34] EXPR counter++ VAL [A=11, counter=1, counter++=0, r=5, R=4, u=9, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=11, counter=1, r=5, R=4, u=9, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=11, counter=1, r=5, R=4, u=9, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [A=11, counter=1, r=4, R=4, u=9, v=3] [L34] EXPR counter++ VAL [A=11, counter=2, counter++=1, r=4, R=4, u=9, v=3] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=11, counter=2, R=4, r=4, u=9, v=3] [L36] COND FALSE !(!(r != 0)) VAL [A=11, counter=2, R=4, r=4, u=9, v=3] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [A=11, counter=2, R=4, r=1, u=9, v=5] [L34] EXPR counter++ VAL [A=11, counter=3, counter++=2, r=1, R=4, u=9, v=5] [L34] COND FALSE !(counter++<2) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 351 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 239 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 113 IncrementalHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 112 mSDtfsCounter, 113 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, InterpolantAutomatonStates: 25, 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, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 435 SizeOfPredicates, 10 NumberOfNonLiveVariables, 372 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 34/40 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! [2021-12-07 00:28:43,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbafdf0e-0e13-490a-a065-06d03869166a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE