./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a --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 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748 --- 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-b5237d8 [2022-11-21 17:05:36,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:05:36,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:05:36,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:05:36,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:05:36,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:05:36,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:05:36,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:05:36,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:05:36,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:05:36,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:05:36,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:05:36,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:05:36,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:05:36,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:05:36,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:05:36,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:05:36,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:05:36,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:05:36,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:05:36,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:05:36,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:05:36,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:05:36,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:05:36,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:05:36,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:05:36,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:05:36,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:05:36,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:05:36,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:05:36,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:05:36,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:05:36,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:05:36,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:05:36,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:05:36,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:05:36,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:05:36,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:05:36,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:05:36,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:05:36,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:05:36,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:05:36,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:05:36,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:05:36,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:05:36,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:05:36,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:05:36,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:05:36,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:05:36,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:05:36,303 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:05:36,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:05:36,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:05:36,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:05:36,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:05:36,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:05:36,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:05:36,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:05:36,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:05:36,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:05:36,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:05:36,306 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:05:36,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:05:36,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:05:36,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:05:36,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:05:36,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:05:36,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:05:36,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:05:36,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:05:36,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:05:36,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:05:36,308 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:05:36,309 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:05:36,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:05:36,309 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_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748 [2022-11-21 17:05:36,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:05:36,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:05:36,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:05:36,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:05:36,625 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:05:36,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/eca-rers2018/Problem16.c [2022-11-21 17:05:39,592 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:05:44,607 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:05:44,608 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/sv-benchmarks/c/eca-rers2018/Problem16.c [2022-11-21 17:05:45,201 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/data/aedc5e270/bc39f1373e914f9fb21b3c62df12acca/FLAG2e7a2e502 [2022-11-21 17:05:45,216 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/data/aedc5e270/bc39f1373e914f9fb21b3c62df12acca [2022-11-21 17:05:45,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:05:45,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:05:45,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:05:45,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:05:45,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:05:45,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:05:45" (1/1) ... [2022-11-21 17:05:45,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f83356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:45, skipping insertion in model container [2022-11-21 17:05:45,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:05:45" (1/1) ... [2022-11-21 17:05:45,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:05:48,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:05:49,038 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_467543ea-f27e-49b8-bfe6-0e222d25e933/sv-benchmarks/c/eca-rers2018/Problem16.c[778,791] [2022-11-21 17:05:49,141 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_467543ea-f27e-49b8-bfe6-0e222d25e933/sv-benchmarks/c/eca-rers2018/Problem16.c[817,830] [2022-11-21 17:07:44,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:07:44,274 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:07:44,286 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_467543ea-f27e-49b8-bfe6-0e222d25e933/sv-benchmarks/c/eca-rers2018/Problem16.c[778,791] [2022-11-21 17:07:44,287 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_467543ea-f27e-49b8-bfe6-0e222d25e933/sv-benchmarks/c/eca-rers2018/Problem16.c[817,830] [2022-11-21 17:07:50,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:07:55,032 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:07:55,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55 WrapperNode [2022-11-21 17:07:55,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:07:55,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:07:55,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:07:55,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:07:55,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:07:56,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:03,619 INFO L138 Inliner]: procedures = 1385, calls = 1376, calls flagged for inlining = 1272, calls inlined = 1272, statements flattened = 632995 [2022-11-21 17:08:03,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:08:03,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:08:03,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:08:03,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:08:03,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:03,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:04,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:04,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:07,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:08,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:08,684 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:09,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:10,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:08:10,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:08:10,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:08:10,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:08:10,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (1/1) ... [2022-11-21 17:08:10,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:08:10,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:08:10,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:08:10,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467543ea-f27e-49b8-bfe6-0e222d25e933/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:08:10,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:08:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:08:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:08:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-11-21 17:08:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-11-21 17:08:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-11-21 17:08:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-11-21 17:08:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:08:11,516 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:08:11,518 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:10:01,118 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:10:01,195 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:10:01,195 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 17:10:01,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:10:01 BoogieIcfgContainer [2022-11-21 17:10:01,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:10:01,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:10:01,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:10:01,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:10:01,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:05:45" (1/3) ... [2022-11-21 17:10:01,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100abeae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:10:01, skipping insertion in model container [2022-11-21 17:10:01,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:07:55" (2/3) ... [2022-11-21 17:10:01,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100abeae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:10:01, skipping insertion in model container [2022-11-21 17:10:01,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:10:01" (3/3) ... [2022-11-21 17:10:01,219 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16.c [2022-11-21 17:10:01,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:10:01,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 17:10:01,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:10:01,425 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;@3edd766f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:10:01,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 17:10:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-21 17:10:01,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 17:10:01,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:10:01,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:01,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:10:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2026736529, now seen corresponding path program 1 times [2022-11-21 17:10:01,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:01,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113581331] [2022-11-21 17:10:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:02,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:02,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113581331] [2022-11-21 17:10:02,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113581331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:02,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:10:02,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:10:02,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568553005] [2022-11-21 17:10:02,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:02,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:10:02,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:10:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:10:02,451 INFO L87 Difference]: Start difference. First operand has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:10:44,807 INFO L93 Difference]: Finished difference Result 19853 states and 36836 transitions. [2022-11-21 17:10:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:10:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 17:10:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:10:44,881 INFO L225 Difference]: With dead ends: 19853 [2022-11-21 17:10:44,881 INFO L226 Difference]: Without dead ends: 11228 [2022-11-21 17:10:44,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:10:44,908 INFO L413 NwaCegarLoop]: 14954 mSDtfsCounter, 3501 mSDsluCounter, 11506 mSDsCounter, 0 mSdLazyCounter, 25181 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 26460 SdHoareTripleChecker+Invalid, 25542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 25181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:10:44,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 26460 Invalid, 25542 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [361 Valid, 25181 Invalid, 0 Unknown, 0 Unchecked, 41.4s Time] [2022-11-21 17:10:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11228 states. [2022-11-21 17:10:45,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11228 to 10284. [2022-11-21 17:10:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10284 states, 10182 states have (on average 1.8511098016106855) internal successors, (18848), 10281 states have internal predecessors, (18848), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 18948 transitions. [2022-11-21 17:10:45,241 INFO L78 Accepts]: Start accepts. Automaton has 10284 states and 18948 transitions. Word has length 13 [2022-11-21 17:10:45,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:10:45,242 INFO L495 AbstractCegarLoop]: Abstraction has 10284 states and 18948 transitions. [2022-11-21 17:10:45,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 10284 states and 18948 transitions. [2022-11-21 17:10:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 17:10:45,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:10:45,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:45,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:10:45,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:10:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash -93322037, now seen corresponding path program 1 times [2022-11-21 17:10:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8527438] [2022-11-21 17:10:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:45,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:45,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:45,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8527438] [2022-11-21 17:10:45,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8527438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:45,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:10:45,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:10:45,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782349346] [2022-11-21 17:10:45,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:45,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:10:45,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:10:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:10:45,717 INFO L87 Difference]: Start difference. First operand 10284 states and 18948 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:11:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:11:42,242 INFO L93 Difference]: Finished difference Result 28172 states and 51666 transitions. [2022-11-21 17:11:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:11:42,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-21 17:11:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:11:42,302 INFO L225 Difference]: With dead ends: 28172 [2022-11-21 17:11:42,302 INFO L226 Difference]: Without dead ends: 17890 [2022-11-21 17:11:42,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:11:42,312 INFO L413 NwaCegarLoop]: 18437 mSDtfsCounter, 8827 mSDsluCounter, 12977 mSDsCounter, 0 mSdLazyCounter, 33252 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8827 SdHoareTripleChecker+Valid, 31414 SdHoareTripleChecker+Invalid, 34404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 33252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:11:42,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8827 Valid, 31414 Invalid, 34404 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1152 Valid, 33252 Invalid, 0 Unknown, 0 Unchecked, 55.6s Time] [2022-11-21 17:11:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17890 states. [2022-11-21 17:11:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17890 to 15292. [2022-11-21 17:11:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15292 states, 15190 states have (on average 1.8283080974325214) internal successors, (27772), 15289 states have internal predecessors, (27772), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:11:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15292 states to 15292 states and 27872 transitions. [2022-11-21 17:11:42,756 INFO L78 Accepts]: Start accepts. Automaton has 15292 states and 27872 transitions. Word has length 20 [2022-11-21 17:11:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:11:42,757 INFO L495 AbstractCegarLoop]: Abstraction has 15292 states and 27872 transitions. [2022-11-21 17:11:42,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:11:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 15292 states and 27872 transitions. [2022-11-21 17:11:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 17:11:42,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:11:42,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:11:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:11:42,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:11:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:11:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2128878770, now seen corresponding path program 1 times [2022-11-21 17:11:42,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:11:42,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833971247] [2022-11-21 17:11:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:11:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:11:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:43,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:11:43,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833971247] [2022-11-21 17:11:43,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833971247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:11:43,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:11:43,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:11:43,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952025201] [2022-11-21 17:11:43,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:11:43,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:11:43,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:11:43,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:11:43,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:11:43,025 INFO L87 Difference]: Start difference. First operand 15292 states and 27872 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:11:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:11:44,548 INFO L93 Difference]: Finished difference Result 44345 states and 80786 transitions. [2022-11-21 17:11:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:11:44,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-21 17:11:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:11:44,621 INFO L225 Difference]: With dead ends: 44345 [2022-11-21 17:11:44,622 INFO L226 Difference]: Without dead ends: 29055 [2022-11-21 17:11:44,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:11:44,656 INFO L413 NwaCegarLoop]: 16236 mSDtfsCounter, 14909 mSDsluCounter, 15334 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14909 SdHoareTripleChecker+Valid, 31570 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:11:44,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14909 Valid, 31570 Invalid, 331 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [134 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 17:11:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29055 states. [2022-11-21 17:11:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29055 to 28947. [2022-11-21 17:11:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28947 states, 28845 states have (on average 1.826486392789045) internal successors, (52685), 28944 states have internal predecessors, (52685), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:11:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28947 states to 28947 states and 52785 transitions. [2022-11-21 17:11:45,242 INFO L78 Accepts]: Start accepts. Automaton has 28947 states and 52785 transitions. Word has length 33 [2022-11-21 17:11:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:11:45,243 INFO L495 AbstractCegarLoop]: Abstraction has 28947 states and 52785 transitions. [2022-11-21 17:11:45,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:11:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 28947 states and 52785 transitions. [2022-11-21 17:11:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 17:11:45,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:11:45,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:11:45,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:11:45,246 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:11:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:11:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash -495105420, now seen corresponding path program 1 times [2022-11-21 17:11:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:11:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168721972] [2022-11-21 17:11:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:11:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:11:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:45,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:11:45,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168721972] [2022-11-21 17:11:45,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168721972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:11:45,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:11:45,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:11:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205699158] [2022-11-21 17:11:45,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:11:45,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:11:45,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:11:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:11:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:11:45,729 INFO L87 Difference]: Start difference. First operand 28947 states and 52785 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:36,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:36,408 INFO L93 Difference]: Finished difference Result 73823 states and 134243 transitions. [2022-11-21 17:12:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:12:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-21 17:12:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:36,516 INFO L225 Difference]: With dead ends: 73823 [2022-11-21 17:12:36,516 INFO L226 Difference]: Without dead ends: 44878 [2022-11-21 17:12:36,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:12:36,544 INFO L413 NwaCegarLoop]: 20218 mSDtfsCounter, 19031 mSDsluCounter, 11876 mSDsCounter, 0 mSdLazyCounter, 21782 mSolverCounterSat, 1417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19031 SdHoareTripleChecker+Valid, 32094 SdHoareTripleChecker+Invalid, 23199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1417 IncrementalHoareTripleChecker+Valid, 21782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.7s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:36,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19031 Valid, 32094 Invalid, 23199 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1417 Valid, 21782 Invalid, 0 Unknown, 0 Unchecked, 49.7s Time] [2022-11-21 17:12:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44878 states. [2022-11-21 17:12:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44878 to 39707. [2022-11-21 17:12:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39707 states, 39605 states have (on average 1.8132811513697766) internal successors, (71815), 39704 states have internal predecessors, (71815), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39707 states to 39707 states and 71915 transitions. [2022-11-21 17:12:37,256 INFO L78 Accepts]: Start accepts. Automaton has 39707 states and 71915 transitions. Word has length 34 [2022-11-21 17:12:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:37,256 INFO L495 AbstractCegarLoop]: Abstraction has 39707 states and 71915 transitions. [2022-11-21 17:12:37,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:37,257 INFO L276 IsEmpty]: Start isEmpty. Operand 39707 states and 71915 transitions. [2022-11-21 17:12:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 17:12:37,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:37,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:37,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:12:37,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:12:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:37,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1899292210, now seen corresponding path program 1 times [2022-11-21 17:12:37,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:37,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197166219] [2022-11-21 17:12:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:37,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197166219] [2022-11-21 17:12:37,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197166219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:37,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:37,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:12:37,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738405797] [2022-11-21 17:12:37,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:37,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:12:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:12:37,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:37,495 INFO L87 Difference]: Start difference. First operand 39707 states and 71915 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)