./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN --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 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:41:37,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:41:37,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:41:37,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:41:37,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:41:37,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:41:37,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:41:37,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:41:37,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:41:37,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:41:37,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:41:37,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:41:37,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:41:37,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:41:37,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:41:37,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:41:37,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:41:37,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:41:37,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:41:37,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:41:37,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:41:37,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:41:37,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:41:37,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:41:37,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:41:37,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:41:37,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:41:37,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:41:37,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:41:37,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:41:37,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:41:37,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:41:37,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:41:37,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:41:37,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:41:37,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:41:37,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:41:37,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:41:37,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:41:37,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:41:37,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:41:37,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:41:37,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:41:37,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:41:37,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:41:37,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:41:37,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:41:37,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:41:37,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:41:37,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:41:37,757 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:41:37,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:41:37,758 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:41:37,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:41:37,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:41:37,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:41:37,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:41:37,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:41:37,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:41:37,759 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:41:37,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:41:37,759 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:41:37,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:41:37,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:41:37,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:41:37,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:41:37,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:41:37,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:41:37,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:41:37,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:41:37,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:41:37,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:41:37,761 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:41:37,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:41:37,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:41:37,764 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_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e [2022-11-20 11:41:38,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:41:38,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:41:38,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:41:38,077 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:41:38,078 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:41:38,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/ldv-regression/test23-1.c [2022-11-20 11:41:40,978 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:41:41,187 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:41:41,188 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/sv-benchmarks/c/ldv-regression/test23-1.c [2022-11-20 11:41:41,195 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/data/ba8e3eb45/1658711c5a764d4380fe28fdf262ce4d/FLAGa2b51b967 [2022-11-20 11:41:41,217 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/data/ba8e3eb45/1658711c5a764d4380fe28fdf262ce4d [2022-11-20 11:41:41,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:41:41,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:41:41,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:41:41,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:41:41,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:41:41,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76fdd6d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41, skipping insertion in model container [2022-11-20 11:41:41,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:41:41,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:41:41,445 WARN L237 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_26ded368-cca1-4dcf-b497-8132fc2b1adf/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2022-11-20 11:41:41,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:41:41,461 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:41:41,479 WARN L237 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_26ded368-cca1-4dcf-b497-8132fc2b1adf/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2022-11-20 11:41:41,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:41:41,494 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:41:41,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41 WrapperNode [2022-11-20 11:41:41,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:41:41,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:41:41,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:41:41,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:41:41,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,532 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-11-20 11:41:41,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:41:41,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:41:41,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:41:41,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:41:41,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,556 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:41:41,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:41:41,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:41:41,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:41:41,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (1/1) ... [2022-11-20 11:41:41,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:41:41,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:41:41,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:41:41,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:41:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:41:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:41:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:41:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2022-11-20 11:41:41,646 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2022-11-20 11:41:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:41:41,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:41:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:41:41,732 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:41:41,734 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:41:41,914 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:41:41,931 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:41:41,932 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:41:41,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:41:41 BoogieIcfgContainer [2022-11-20 11:41:41,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:41:41,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:41:41,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:41:41,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:41:41,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:41:41" (1/3) ... [2022-11-20 11:41:41,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7ddfee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:41:41, skipping insertion in model container [2022-11-20 11:41:41,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:41" (2/3) ... [2022-11-20 11:41:41,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7ddfee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:41:41, skipping insertion in model container [2022-11-20 11:41:41,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:41:41" (3/3) ... [2022-11-20 11:41:41,944 INFO L112 eAbstractionObserver]: Analyzing ICFG test23-1.c [2022-11-20 11:41:42,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:41:42,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:41:42,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:41:42,095 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7d80f886, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:41:42,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:41:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:41:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:41:42,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:41:42,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:41:42,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:41:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:41:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1478003781, now seen corresponding path program 1 times [2022-11-20 11:41:42,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:41:42,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710550648] [2022-11-20 11:41:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:42,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:41:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:42,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:41:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:42,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 11:41:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:42,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:41:42,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710550648] [2022-11-20 11:41:42,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710550648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:41:42,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:41:42,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:41:42,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340059941] [2022-11-20 11:41:42,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:41:42,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:41:42,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:41:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:41:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:41:42,402 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:41:42,417 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-20 11:41:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:41:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-20 11:41:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:41:42,425 INFO L225 Difference]: With dead ends: 31 [2022-11-20 11:41:42,426 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 11:41:42,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:41:42,432 INFO L413 NwaCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:41:42,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:41:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 11:41:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-20 11:41:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:41:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-20 11:41:42,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 19 [2022-11-20 11:41:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:41:42,473 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-20 11:41:42,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-20 11:41:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:41:42,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:41:42,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:41:42,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:41:42,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:41:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:41:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1220515189, now seen corresponding path program 1 times [2022-11-20 11:41:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:41:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854084287] [2022-11-20 11:41:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:42,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:41:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:43,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:41:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 11:41:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:43,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:41:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854084287] [2022-11-20 11:41:43,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854084287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:41:43,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:41:43,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:41:43,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190748448] [2022-11-20 11:41:43,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:41:43,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:41:43,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:41:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:41:43,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:41:43,078 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:41:43,124 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-11-20 11:41:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:41:43,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-20 11:41:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:41:43,126 INFO L225 Difference]: With dead ends: 25 [2022-11-20 11:41:43,126 INFO L226 Difference]: Without dead ends: 20 [2022-11-20 11:41:43,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:41:43,128 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:41:43,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:41:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-20 11:41:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-20 11:41:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:41:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-20 11:41:43,135 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 20 [2022-11-20 11:41:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:41:43,136 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-20 11:41:43,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-20 11:41:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:41:43,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:41:43,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:41:43,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:41:43,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:41:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:41:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1898823162, now seen corresponding path program 1 times [2022-11-20 11:41:43,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:41:43,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328258798] [2022-11-20 11:41:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:41:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:43,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:41:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:43,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 11:41:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:43,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:41:43,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328258798] [2022-11-20 11:41:43,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328258798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:41:43,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067373956] [2022-11-20 11:41:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:43,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:41:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:41:43,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:41:43,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:41:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:41:43,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:41:43,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-20 11:41:43,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 11:41:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:43,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:41:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:44,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067373956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:41:44,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:41:44,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-11-20 11:41:44,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655430839] [2022-11-20 11:41:44,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:41:44,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:41:44,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:41:44,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:41:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:41:44,040 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:41:44,114 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-20 11:41:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:41:44,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-20 11:41:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:41:44,116 INFO L225 Difference]: With dead ends: 29 [2022-11-20 11:41:44,116 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 11:41:44,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:41:44,118 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:41:44,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-11-20 11:41:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 11:41:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-20 11:41:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:41:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-20 11:41:44,124 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2022-11-20 11:41:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:41:44,125 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-20 11:41:44,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-20 11:41:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:41:44,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:41:44,126 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:41:44,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:41:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:41:44,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:41:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:41:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1289734332, now seen corresponding path program 2 times [2022-11-20 11:41:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:41:44,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341803769] [2022-11-20 11:41:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:41:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:41:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:44,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 11:41:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:44,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:41:44,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341803769] [2022-11-20 11:41:44,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341803769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:41:44,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687544709] [2022-11-20 11:41:44,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:41:44,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:41:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:41:44,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:41:44,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:41:44,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:41:44,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:41:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:41:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:41:44,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-20 11:41:45,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 14 [2022-11-20 11:41:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:45,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:41:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:45,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687544709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:41:45,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:41:45,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-11-20 11:41:45,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868424179] [2022-11-20 11:41:45,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:41:45,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:41:45,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:41:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:41:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:41:45,222 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:41:45,539 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-20 11:41:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:41:45,540 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-20 11:41:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:41:45,540 INFO L225 Difference]: With dead ends: 39 [2022-11-20 11:41:45,541 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 11:41:45,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:41:45,542 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:41:45,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:41:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 11:41:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-20 11:41:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:41:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-11-20 11:41:45,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 26 [2022-11-20 11:41:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:41:45,551 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-11-20 11:41:45,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-11-20 11:41:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:41:45,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:41:45,553 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:41:45,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:41:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:41:45,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:41:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:41:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2064062819, now seen corresponding path program 3 times [2022-11-20 11:41:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:41:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719806150] [2022-11-20 11:41:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:41:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:46,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:41:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:46,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 11:41:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:46,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:41:46,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719806150] [2022-11-20 11:41:46,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719806150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:41:46,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004375821] [2022-11-20 11:41:46,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:41:46,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:41:46,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:41:46,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:41:46,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:41:46,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 11:41:46,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:41:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:41:46,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:41:46,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-20 11:41:46,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 15 [2022-11-20 11:41:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:46,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:41:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:41:47,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004375821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:41:47,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:41:47,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-11-20 11:41:47,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902872758] [2022-11-20 11:41:47,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:41:47,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:41:47,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:41:47,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:41:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:41:47,009 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:41:47,456 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-11-20 11:41:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:41:47,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-11-20 11:41:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:41:47,458 INFO L225 Difference]: With dead ends: 45 [2022-11-20 11:41:47,458 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 11:41:47,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:41:47,460 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:41:47,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 107 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:41:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 11:41:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-20 11:41:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:41:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-20 11:41:47,472 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2022-11-20 11:41:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:41:47,473 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-20 11:41:47,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:41:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-20 11:41:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 11:41:47,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:41:47,475 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:41:47,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:41:47,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:41:47,681 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:41:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:41:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1028786796, now seen corresponding path program 4 times [2022-11-20 11:41:47,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:41:47,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489632181] [2022-11-20 11:41:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:47,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:41:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:41:47,715 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:41:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:41:47,760 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:41:47,760 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:41:47,762 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 11:41:47,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:41:47,767 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-20 11:41:47,772 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 11:41:47,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:41:47 BoogieIcfgContainer [2022-11-20 11:41:47,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 11:41:47,835 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 11:41:47,835 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 11:41:47,835 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 11:41:47,835 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:41:41" (3/4) ... [2022-11-20 11:41:47,837 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 11:41:47,885 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 11:41:47,886 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 11:41:47,886 INFO L158 Benchmark]: Toolchain (without parser) took 6663.66ms. Allocated memory was 134.2MB in the beginning and 220.2MB in the end (delta: 86.0MB). Free memory was 69.6MB in the beginning and 112.5MB in the end (delta: -42.8MB). Peak memory consumption was 44.8MB. Max. memory is 16.1GB. [2022-11-20 11:41:47,887 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 134.2MB. Free memory is still 109.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:41:47,887 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.44ms. Allocated memory was 134.2MB in the beginning and 182.5MB in the end (delta: 48.2MB). Free memory was 69.5MB in the beginning and 149.0MB in the end (delta: -79.5MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2022-11-20 11:41:47,887 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.79ms. Allocated memory is still 182.5MB. Free memory was 149.0MB in the beginning and 147.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 11:41:47,888 INFO L158 Benchmark]: Boogie Preprocessor took 26.16ms. Allocated memory is still 182.5MB. Free memory was 147.8MB in the beginning and 146.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:41:47,888 INFO L158 Benchmark]: RCFGBuilder took 374.11ms. Allocated memory is still 182.5MB. Free memory was 146.5MB in the beginning and 134.2MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 11:41:47,889 INFO L158 Benchmark]: TraceAbstraction took 5897.11ms. Allocated memory was 182.5MB in the beginning and 220.2MB in the end (delta: 37.7MB). Free memory was 133.9MB in the beginning and 116.7MB in the end (delta: 17.3MB). Peak memory consumption was 56.1MB. Max. memory is 16.1GB. [2022-11-20 11:41:47,889 INFO L158 Benchmark]: Witness Printer took 51.28ms. Allocated memory is still 220.2MB. Free memory was 116.7MB in the beginning and 112.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 11:41:47,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 134.2MB. Free memory is still 109.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.44ms. Allocated memory was 134.2MB in the beginning and 182.5MB in the end (delta: 48.2MB). Free memory was 69.5MB in the beginning and 149.0MB in the end (delta: -79.5MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.79ms. Allocated memory is still 182.5MB. Free memory was 149.0MB in the beginning and 147.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.16ms. Allocated memory is still 182.5MB. Free memory was 147.8MB in the beginning and 146.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 374.11ms. Allocated memory is still 182.5MB. Free memory was 146.5MB in the beginning and 134.2MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5897.11ms. Allocated memory was 182.5MB in the beginning and 220.2MB in the end (delta: 37.7MB). Free memory was 133.9MB in the beginning and 116.7MB in the end (delta: 17.3MB). Peak memory consumption was 56.1MB. Max. memory is 16.1GB. * Witness Printer took 51.28ms. Allocated memory is still 220.2MB. Free memory was 116.7MB in the beginning and 112.5MB in the end (delta: 4.2MB). 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: 52]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] struct dummy d1, d2; VAL [d1={4:0}, d2={5:0}] [L35] CALL init() [L16] d1.a = __VERIFIER_nondet_int() [L17] d1.b = __VERIFIER_nondet_int() [L19] d2.a = __VERIFIER_nondet_int() [L20] d2.b = __VERIFIER_nondet_int() [L35] RET init() [L36] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}] [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L36] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}, pd1={4:0}] [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L37] int i = __VERIFIER_nondet_int(); [L38] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L39] pd2->array[i] = i [L40] int *pa = &pd1->array[i]; [L41] EXPR pd2->array[i] [L41] i = pd2->array[i] - 10 [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=-4, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-3, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=-3, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-2, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=-2, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-1, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=-1, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=0, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=0, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=1, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=1, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=2, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=2, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=3, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=3, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=4, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=4, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=5, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=5, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=6, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=6, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=7, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=7, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND FALSE !(i <= *pa) [L45] CALL, EXPR check(pd2, i) [L30] EXPR s1->array[i] [L30] return s1->array[i] == i; [L45] RET, EXPR check(pd2, i) [L45] COND TRUE !check(pd2, i) [L52] reach_error() VAL [d1={4:0}, d2={5:0}, i=7, pa={4:32}, pd1={4:0}, pd2={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.7s, OverallIterations: 6, TraceHistogramMax: 12, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 297 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 166 IncrementalHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 92 mSDtfsCounter, 166 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 240 GetRequests, 159 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 280 ConstructedInterpolants, 2 QuantifiedInterpolants, 2084 SizeOfPredicates, 35 NumberOfNonLiveVariables, 498 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 33/291 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! [2022-11-20 11:41:47,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26ded368-cca1-4dcf-b497-8132fc2b1adf/bin/uautomizer-ug76WZFUDN/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