./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.3.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/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_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.3.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/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 64bit --witnessprinter.graph.data.programhash a6a9fcd02da26af7d325aaa9af7ff43790a2b784c4bc27cbf779dfc7d23a188a --- 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 10:57:38,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:57:38,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:57:38,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:57:38,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:57:38,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:57:38,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:57:38,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:57:38,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:57:38,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:57:38,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:57:38,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:57:38,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:57:38,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:57:38,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:57:38,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:57:38,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:57:38,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:57:38,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:57:38,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:57:38,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:57:38,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:57:38,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:57:38,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:57:38,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:57:38,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:57:38,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:57:38,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:57:38,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:57:38,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:57:38,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:57:38,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:57:38,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:57:38,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:57:38,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:57:38,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:57:38,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:57:38,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:57:38,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:57:38,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:57:38,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:57:38,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-20 10:57:38,960 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:57:38,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:57:38,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:57:38,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:57:38,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:57:38,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:57:38,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:57:38,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:57:38,964 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:57:38,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:57:38,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:57:38,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:57:38,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:57:38,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:57:38,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:57:38,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:57:38,967 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:57:38,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:57:38,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:57:38,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:57:38,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:57:38,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:57:38,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:57:38,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:57:38,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:57:38,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:57:38,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:57:38,969 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:57:38,970 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:57:38,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:57:38,970 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_33ee64df-cb36-4981-a027-495dfeaaaff1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6a9fcd02da26af7d325aaa9af7ff43790a2b784c4bc27cbf779dfc7d23a188a [2022-11-20 10:57:39,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:57:39,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:57:39,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:57:39,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:57:39,253 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:57:39,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.3.prop1-back-serstep.c [2022-11-20 10:57:42,353 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:57:42,780 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:57:42,780 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.3.prop1-back-serstep.c [2022-11-20 10:57:42,806 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/data/5c8f49b03/549e4b81e1194d2ea5afcc5aa3c92e94/FLAG8cfe71fea [2022-11-20 10:57:42,819 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/data/5c8f49b03/549e4b81e1194d2ea5afcc5aa3c92e94 [2022-11-20 10:57:42,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:57:42,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:57:42,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:57:42,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:57:42,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:57:42,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:57:42" (1/1) ... [2022-11-20 10:57:42,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df84e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:42, skipping insertion in model container [2022-11-20 10:57:42,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:57:42" (1/1) ... [2022-11-20 10:57:42,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:57:42,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:57:43,172 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_33ee64df-cb36-4981-a027-495dfeaaaff1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.3.prop1-back-serstep.c[1014,1027] [2022-11-20 10:57:43,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:57:43,699 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:57:43,712 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_33ee64df-cb36-4981-a027-495dfeaaaff1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.3.prop1-back-serstep.c[1014,1027] [2022-11-20 10:57:43,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:57:43,990 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:57:43,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43 WrapperNode [2022-11-20 10:57:43,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:57:43,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:57:43,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:57:43,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:57:44,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,205 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2855 [2022-11-20 10:57:44,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:57:44,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:57:44,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:57:44,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:57:44,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:57:44,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:57:44,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:57:44,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:57:44,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (1/1) ... [2022-11-20 10:57:44,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:57:44,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:44,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:57:44,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33ee64df-cb36-4981-a027-495dfeaaaff1/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:57:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:57:44,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:57:45,328 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:57:45,341 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:09:30,015 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:09:30,022 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:09:30,023 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:09:30,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:09:30 BoogieIcfgContainer [2022-11-20 11:09:30,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:09:30,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:09:30,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:09:30,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:09:30,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:57:42" (1/3) ... [2022-11-20 11:09:30,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e105bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:09:30, skipping insertion in model container [2022-11-20 11:09:30,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:43" (2/3) ... [2022-11-20 11:09:30,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e105bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:09:30, skipping insertion in model container [2022-11-20 11:09:30,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:09:30" (3/3) ... [2022-11-20 11:09:30,035 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp.3.prop1-back-serstep.c [2022-11-20 11:09:30,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:09:30,055 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:09:30,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:09:30,140 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;@555db2b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:09:30,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:09:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:09:30,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:30,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:09:30,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:09:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-20 11:09:30,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:30,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283379936] [2022-11-20 11:09:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:30,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:33,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:33,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283379936] [2022-11-20 11:09:33,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283379936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:33,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:33,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:09:33,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278009117] [2022-11-20 11:09:33,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:09:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:09:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:09:33,395 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:34,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:09:37,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:09:39,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:09:39,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:39,208 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-20 11:09:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:09:39,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:09:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:39,217 INFO L225 Difference]: With dead ends: 19 [2022-11-20 11:09:39,217 INFO L226 Difference]: Without dead ends: 10 [2022-11-20 11:09:39,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:39,223 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:39,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-20 11:09:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-20 11:09:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-11-20 11:09:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 11:09:39,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-20 11:09:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:39,267 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 11:09:39,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 11:09:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:09:39,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:39,268 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:39,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:09:39,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:09:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-20 11:09:39,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:39,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612980000] [2022-11-20 11:09:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:39,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms