./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:31:44,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:31:44,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:31:44,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:31:44,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:31:44,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:31:44,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:31:44,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:31:44,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:31:44,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:31:44,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:31:44,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:31:44,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:31:44,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:31:44,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:31:44,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:31:44,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:31:44,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:31:44,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:31:44,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:31:44,264 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:31:44,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:31:44,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:31:44,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:31:44,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:31:44,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:31:44,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:31:44,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:31:44,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:31:44,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:31:44,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:31:44,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:31:44,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:31:44,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:31:44,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:31:44,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:31:44,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:31:44,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:31:44,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:31:44,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:31:44,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:31:44,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:31:44,280 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 16:31:44,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:31:44,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:31:44,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:31:44,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:31:44,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:31:44,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:31:44,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:31:44,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:31:44,305 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:31:44,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:31:44,305 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:31:44,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:31:44,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:31:44,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:31:44,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 16:31:44,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:31:44,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 16:31:44,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:31:44,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 16:31:44,306 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:31:44,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 16:31:44,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:31:44,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:31:44,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:31:44,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:31:44,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:31:44,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:31:44,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 16:31:44,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:31:44,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:31:44,308 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 16:31:44,308 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 16:31:44,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 16:31:44,308 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d [2022-07-21 16:31:44,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:31:44,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:31:44,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:31:44,544 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:31:44,545 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:31:44,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2022-07-21 16:31:44,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1465ccdc/7aad974cf7624ccf9c6e3f6b52cbe63d/FLAG870e8a414 [2022-07-21 16:31:45,009 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:31:45,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2022-07-21 16:31:45,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1465ccdc/7aad974cf7624ccf9c6e3f6b52cbe63d/FLAG870e8a414 [2022-07-21 16:31:45,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1465ccdc/7aad974cf7624ccf9c6e3f6b52cbe63d [2022-07-21 16:31:45,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:31:45,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:31:45,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:31:45,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:31:45,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:31:45,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:45,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a8c8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45, skipping insertion in model container [2022-07-21 16:31:45,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:45,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:31:45,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:31:45,693 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2022-07-21 16:31:45,791 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2022-07-21 16:31:45,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:31:45,807 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:31:45,834 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2022-07-21 16:31:45,879 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2022-07-21 16:31:45,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:31:45,917 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:31:45,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45 WrapperNode [2022-07-21 16:31:45,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:31:45,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:31:45,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:31:45,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:31:45,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:45,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,028 INFO L137 Inliner]: procedures = 177, calls = 336, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1181 [2022-07-21 16:31:46,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:31:46,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:31:46,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:31:46,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:31:46,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:31:46,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:31:46,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:31:46,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:31:46,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (1/1) ... [2022-07-21 16:31:46,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:31:46,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:46,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 16:31:46,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 16:31:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:31:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 16:31:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 16:31:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:31:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-21 16:31:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-21 16:31:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 16:31:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 16:31:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 16:31:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:31:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-21 16:31:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 16:31:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:31:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 16:31:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:31:46,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:31:46,391 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:31:46,392 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:31:47,313 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:31:47,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:31:47,322 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2022-07-21 16:31:47,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:31:47 BoogieIcfgContainer [2022-07-21 16:31:47,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:31:47,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:31:47,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:31:47,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:31:47,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:31:45" (1/3) ... [2022-07-21 16:31:47,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30728c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:31:47, skipping insertion in model container [2022-07-21 16:31:47,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:31:45" (2/3) ... [2022-07-21 16:31:47,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30728c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:31:47, skipping insertion in model container [2022-07-21 16:31:47,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:31:47" (3/3) ... [2022-07-21 16:31:47,331 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test3-2.i [2022-07-21 16:31:47,340 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:31:47,340 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 16:31:47,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:31:47,381 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67652312, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@783be510 [2022-07-21 16:31:47,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 16:31:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 218 states have (on average 1.6926605504587156) internal successors, (369), 225 states have internal predecessors, (369), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:31:47,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:47,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:31:47,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash -858857507, now seen corresponding path program 1 times [2022-07-21 16:31:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:47,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562036109] [2022-07-21 16:31:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:31:47,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:47,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562036109] [2022-07-21 16:31:47,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562036109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:47,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:47,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:31:47,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026208676] [2022-07-21 16:31:47,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:47,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 16:31:47,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 16:31:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 16:31:47,524 INFO L87 Difference]: Start difference. First operand has 231 states, 218 states have (on average 1.6926605504587156) internal successors, (369), 225 states have internal predecessors, (369), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-07-21 16:31:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:47,556 INFO L93 Difference]: Finished difference Result 460 states and 773 transitions. [2022-07-21 16:31:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 16:31:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) Word has length 9 [2022-07-21 16:31:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:47,567 INFO L225 Difference]: With dead ends: 460 [2022-07-21 16:31:47,568 INFO L226 Difference]: Without dead ends: 198 [2022-07-21 16:31:47,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 16:31:47,575 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:47,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:31:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-21 16:31:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-07-21 16:31:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.3279569892473118) internal successors, (247), 192 states have internal predecessors, (247), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2022-07-21 16:31:47,629 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 9 [2022-07-21 16:31:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:47,629 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2022-07-21 16:31:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-07-21 16:31:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2022-07-21 16:31:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:31:47,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:47,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:31:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:31:47,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1459926514, now seen corresponding path program 1 times [2022-07-21 16:31:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589405150] [2022-07-21 16:31:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:31:47,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:47,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589405150] [2022-07-21 16:31:47,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589405150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:47,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:47,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:31:47,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541532341] [2022-07-21 16:31:47,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:47,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:31:47,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:31:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:31:47,718 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-21 16:31:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:47,996 INFO L93 Difference]: Finished difference Result 431 states and 581 transitions. [2022-07-21 16:31:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:31:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 14 [2022-07-21 16:31:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:47,998 INFO L225 Difference]: With dead ends: 431 [2022-07-21 16:31:47,998 INFO L226 Difference]: Without dead ends: 327 [2022-07-21 16:31:47,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:31:48,000 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 158 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:48,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 653 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:31:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-21 16:31:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 200. [2022-07-21 16:31:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 188 states have (on average 1.324468085106383) internal successors, (249), 194 states have internal predecessors, (249), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 265 transitions. [2022-07-21 16:31:48,010 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 265 transitions. Word has length 14 [2022-07-21 16:31:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:48,010 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 265 transitions. [2022-07-21 16:31:48,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-21 16:31:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 265 transitions. [2022-07-21 16:31:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 16:31:48,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:48,014 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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] [2022-07-21 16:31:48,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:31:48,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash -917613318, now seen corresponding path program 1 times [2022-07-21 16:31:48,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:48,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730498048] [2022-07-21 16:31:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:48,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:31:48,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121493748] [2022-07-21 16:31:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:48,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:48,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:48,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:31:48,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:31:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 16:31:48,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:31:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:31:48,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:31:48,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:48,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730498048] [2022-07-21 16:31:48,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:31:48,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121493748] [2022-07-21 16:31:48,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121493748] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:48,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:48,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:31:48,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849018187] [2022-07-21 16:31:48,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:48,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:31:48,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:31:48,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:31:48,644 INFO L87 Difference]: Start difference. First operand 200 states and 265 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-07-21 16:31:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:48,712 INFO L93 Difference]: Finished difference Result 417 states and 557 transitions. [2022-07-21 16:31:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:31:48,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 66 [2022-07-21 16:31:48,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:48,713 INFO L225 Difference]: With dead ends: 417 [2022-07-21 16:31:48,713 INFO L226 Difference]: Without dead ends: 221 [2022-07-21 16:31:48,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:31:48,715 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 9 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:48,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 471 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:31:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-21 16:31:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-07-21 16:31:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 208 states have (on average 1.2932692307692308) internal successors, (269), 214 states have internal predecessors, (269), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 285 transitions. [2022-07-21 16:31:48,721 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 285 transitions. Word has length 66 [2022-07-21 16:31:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:48,722 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 285 transitions. [2022-07-21 16:31:48,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-07-21 16:31:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 285 transitions. [2022-07-21 16:31:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 16:31:48,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:48,724 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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] [2022-07-21 16:31:48,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 16:31:48,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:48,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:48,942 INFO L85 PathProgramCache]: Analyzing trace with hash -564524936, now seen corresponding path program 1 times [2022-07-21 16:31:48,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:48,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529394084] [2022-07-21 16:31:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:48,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:49,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:31:49,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481074840] [2022-07-21 16:31:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:49,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:49,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:49,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:31:49,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:31:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:49,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 16:31:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:31:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:31:49,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:31:49,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529394084] [2022-07-21 16:31:49,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:31:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481074840] [2022-07-21 16:31:49,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481074840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:49,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:49,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:31:49,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354393692] [2022-07-21 16:31:49,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:49,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:31:49,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:31:49,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:31:49,635 INFO L87 Difference]: Start difference. First operand 220 states and 285 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2022-07-21 16:31:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:49,716 INFO L93 Difference]: Finished difference Result 428 states and 558 transitions. [2022-07-21 16:31:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:31:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 66 [2022-07-21 16:31:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:49,728 INFO L225 Difference]: With dead ends: 428 [2022-07-21 16:31:49,728 INFO L226 Difference]: Without dead ends: 212 [2022-07-21 16:31:49,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:31:49,729 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 226 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:49,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 499 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:31:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-21 16:31:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2022-07-21 16:31:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 194 states have (on average 1.2783505154639174) internal successors, (248), 200 states have internal predecessors, (248), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2022-07-21 16:31:49,735 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 66 [2022-07-21 16:31:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:49,735 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2022-07-21 16:31:49,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2022-07-21 16:31:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2022-07-21 16:31:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 16:31:49,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:49,736 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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] [2022-07-21 16:31:49,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 16:31:49,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 16:31:49,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1134939002, now seen corresponding path program 1 times [2022-07-21 16:31:49,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:49,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318458970] [2022-07-21 16:31:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:49,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:50,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:31:50,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175885460] [2022-07-21 16:31:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:50,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:50,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:50,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:31:50,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:31:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:50,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:31:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:31:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:31:50,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:31:50,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318458970] [2022-07-21 16:31:50,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:31:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175885460] [2022-07-21 16:31:50,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175885460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:50,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:50,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:31:50,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497907845] [2022-07-21 16:31:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:31:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:31:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:31:50,710 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-07-21 16:31:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:50,800 INFO L93 Difference]: Finished difference Result 532 states and 686 transitions. [2022-07-21 16:31:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:31:50,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 66 [2022-07-21 16:31:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:50,803 INFO L225 Difference]: With dead ends: 532 [2022-07-21 16:31:50,803 INFO L226 Difference]: Without dead ends: 330 [2022-07-21 16:31:50,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:31:50,804 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 113 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:50,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 550 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:31:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-21 16:31:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 312. [2022-07-21 16:31:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 300 states have (on average 1.27) internal successors, (381), 306 states have internal predecessors, (381), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 397 transitions. [2022-07-21 16:31:50,812 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 397 transitions. Word has length 66 [2022-07-21 16:31:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:50,813 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 397 transitions. [2022-07-21 16:31:50,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-07-21 16:31:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 397 transitions. [2022-07-21 16:31:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 16:31:50,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:50,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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] [2022-07-21 16:31:50,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:31:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:51,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash 917413940, now seen corresponding path program 1 times [2022-07-21 16:31:51,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:51,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231334794] [2022-07-21 16:31:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:51,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:51,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:31:51,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175519563] [2022-07-21 16:31:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:51,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:51,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:51,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:31:51,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:31:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:51,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:31:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:31:51,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:31:51,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:31:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:31:51,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:31:51,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:51,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231334794] [2022-07-21 16:31:51,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:31:51,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175519563] [2022-07-21 16:31:51,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175519563] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:51,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:31:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874443348] [2022-07-21 16:31:51,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:51,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:31:51,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:31:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:31:51,530 INFO L87 Difference]: Start difference. First operand 312 states and 397 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:31:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:52,183 INFO L93 Difference]: Finished difference Result 427 states and 554 transitions. [2022-07-21 16:31:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:31:52,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 81 [2022-07-21 16:31:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:52,191 INFO L225 Difference]: With dead ends: 427 [2022-07-21 16:31:52,191 INFO L226 Difference]: Without dead ends: 406 [2022-07-21 16:31:52,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:31:52,192 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 102 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:52,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 674 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:31:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-07-21 16:31:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 314. [2022-07-21 16:31:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 302 states have (on average 1.2682119205298013) internal successors, (383), 308 states have internal predecessors, (383), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 399 transitions. [2022-07-21 16:31:52,201 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 399 transitions. Word has length 81 [2022-07-21 16:31:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:52,201 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 399 transitions. [2022-07-21 16:31:52,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:31:52,201 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 399 transitions. [2022-07-21 16:31:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 16:31:52,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:52,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 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] [2022-07-21 16:31:52,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 16:31:52,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:52,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash 247470663, now seen corresponding path program 1 times [2022-07-21 16:31:52,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:52,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055194273] [2022-07-21 16:31:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:52,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:52,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:31:52,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039656479] [2022-07-21 16:31:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:52,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:31:52,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:31:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:52,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 16:31:52,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:31:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:31:52,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:31:52,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055194273] [2022-07-21 16:31:52,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:31:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039656479] [2022-07-21 16:31:52,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039656479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:52,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:52,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:31:52,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149389772] [2022-07-21 16:31:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:52,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:31:52,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:31:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:31:52,914 INFO L87 Difference]: Start difference. First operand 314 states and 399 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:31:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:52,970 INFO L93 Difference]: Finished difference Result 521 states and 685 transitions. [2022-07-21 16:31:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:31:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-07-21 16:31:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:52,973 INFO L225 Difference]: With dead ends: 521 [2022-07-21 16:31:52,973 INFO L226 Difference]: Without dead ends: 356 [2022-07-21 16:31:52,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:31:52,975 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 8 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:52,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 459 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:31:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-21 16:31:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 354. [2022-07-21 16:31:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 342 states have (on average 1.236842105263158) internal successors, (423), 348 states have internal predecessors, (423), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 439 transitions. [2022-07-21 16:31:52,990 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 439 transitions. Word has length 111 [2022-07-21 16:31:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:52,990 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 439 transitions. [2022-07-21 16:31:52,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:31:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 439 transitions. [2022-07-21 16:31:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 16:31:52,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:52,993 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 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] [2022-07-21 16:31:53,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:31:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:53,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1258587913, now seen corresponding path program 1 times [2022-07-21 16:31:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022723698] [2022-07-21 16:31:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:53,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:31:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433270919] [2022-07-21 16:31:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:53,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:53,244 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:31:53,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:31:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:53,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 16:31:53,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:31:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:31:53,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:31:53,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:53,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022723698] [2022-07-21 16:31:53,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:31:53,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433270919] [2022-07-21 16:31:53,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433270919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:53,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:53,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:31:53,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087621399] [2022-07-21 16:31:53,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:53,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:31:53,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:31:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:31:53,733 INFO L87 Difference]: Start difference. First operand 354 states and 439 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:31:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:53,783 INFO L93 Difference]: Finished difference Result 536 states and 680 transitions. [2022-07-21 16:31:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:31:53,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-07-21 16:31:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:53,785 INFO L225 Difference]: With dead ends: 536 [2022-07-21 16:31:53,785 INFO L226 Difference]: Without dead ends: 331 [2022-07-21 16:31:53,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:31:53,786 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 110 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:53,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 586 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:31:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-21 16:31:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 326. [2022-07-21 16:31:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 314 states have (on average 1.213375796178344) internal successors, (381), 320 states have internal predecessors, (381), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 397 transitions. [2022-07-21 16:31:53,793 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 397 transitions. Word has length 111 [2022-07-21 16:31:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:53,793 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 397 transitions. [2022-07-21 16:31:53,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:31:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 397 transitions. [2022-07-21 16:31:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 16:31:53,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:53,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 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] [2022-07-21 16:31:53,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:31:54,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:54,011 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash 100979453, now seen corresponding path program 1 times [2022-07-21 16:31:54,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:54,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719644357] [2022-07-21 16:31:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:54,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:54,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:31:54,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796280789] [2022-07-21 16:31:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:54,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:54,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:54,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:31:54,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:31:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:31:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:31:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:31:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 16:31:54,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:31:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:31:54,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719644357] [2022-07-21 16:31:54,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:31:54,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796280789] [2022-07-21 16:31:54,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796280789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:31:54,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:31:54,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:31:54,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103163651] [2022-07-21 16:31:54,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:31:54,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:31:54,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:31:54,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:31:54,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:31:54,633 INFO L87 Difference]: Start difference. First operand 326 states and 397 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:31:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:31:54,834 INFO L93 Difference]: Finished difference Result 720 states and 898 transitions. [2022-07-21 16:31:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:31:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-07-21 16:31:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:31:54,836 INFO L225 Difference]: With dead ends: 720 [2022-07-21 16:31:54,836 INFO L226 Difference]: Without dead ends: 442 [2022-07-21 16:31:54,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:31:54,837 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 446 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:31:54,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 508 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:31:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-07-21 16:31:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 410. [2022-07-21 16:31:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 398 states have (on average 1.2185929648241205) internal successors, (485), 404 states have internal predecessors, (485), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 16:31:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 501 transitions. [2022-07-21 16:31:54,847 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 501 transitions. Word has length 111 [2022-07-21 16:31:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:31:54,847 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 501 transitions. [2022-07-21 16:31:54,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:31:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 501 transitions. [2022-07-21 16:31:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 16:31:54,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:31:54,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 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] [2022-07-21 16:31:54,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:31:55,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:55,063 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:31:55,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:31:55,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1499063757, now seen corresponding path program 1 times [2022-07-21 16:31:55,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:31:55,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348737785] [2022-07-21 16:31:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:55,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:31:55,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:31:55,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550746683] [2022-07-21 16:31:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:31:55,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:31:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:31:55,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:31:55,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:32:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:32:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:32:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:32:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:32:02,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:32:02,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:32:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348737785] [2022-07-21 16:32:02,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:32:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550746683] [2022-07-21 16:32:02,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550746683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:32:02,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:32:02,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:32:02,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255147371] [2022-07-21 16:32:02,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:32:02,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:32:02,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:32:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:32:02,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:32:02,193 INFO L87 Difference]: Start difference. First operand 410 states and 501 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:32:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:32:02,221 INFO L93 Difference]: Finished difference Result 772 states and 951 transitions. [2022-07-21 16:32:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:32:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-07-21 16:32:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:32:02,223 INFO L225 Difference]: With dead ends: 772 [2022-07-21 16:32:02,223 INFO L226 Difference]: Without dead ends: 413 [2022-07-21 16:32:02,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:32:02,225 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 2 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:32:02,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 734 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:32:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-21 16:32:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2022-07-21 16:32:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 400 states have (on average 1.22) internal successors, (488), 407 states have internal predecessors, (488), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 16:32:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 505 transitions. [2022-07-21 16:32:02,233 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 505 transitions. Word has length 118 [2022-07-21 16:32:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:32:02,233 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 505 transitions. [2022-07-21 16:32:02,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:32:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 505 transitions. [2022-07-21 16:32:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 16:32:02,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:32:02,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:32:02,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 16:32:02,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 16:32:02,455 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:32:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:32:02,455 INFO L85 PathProgramCache]: Analyzing trace with hash -586883627, now seen corresponding path program 1 times [2022-07-21 16:32:02,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:32:02,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278781635] [2022-07-21 16:32:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:32:02,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:32:02,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:32:02,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094851908] [2022-07-21 16:32:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:32:02,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:32:02,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:32:02,490 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:32:02,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:32:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:32:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 16:32:49,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:32:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:32:49,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:32:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:32:49,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:32:49,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278781635] [2022-07-21 16:32:49,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:32:49,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094851908] [2022-07-21 16:32:49,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094851908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:32:49,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:32:49,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 16:32:49,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262389296] [2022-07-21 16:32:49,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:32:49,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:32:49,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:32:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:32:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:32:49,466 INFO L87 Difference]: Start difference. First operand 413 states and 505 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:32:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:32:49,583 INFO L93 Difference]: Finished difference Result 786 states and 972 transitions. [2022-07-21 16:32:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:32:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2022-07-21 16:32:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:32:49,585 INFO L225 Difference]: With dead ends: 786 [2022-07-21 16:32:49,586 INFO L226 Difference]: Without dead ends: 422 [2022-07-21 16:32:49,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:32:49,587 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 17 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:32:49,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 734 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:32:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-07-21 16:32:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2022-07-21 16:32:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 408 states have (on average 1.2254901960784315) internal successors, (500), 415 states have internal predecessors, (500), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 16:32:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 517 transitions. [2022-07-21 16:32:49,597 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 517 transitions. Word has length 120 [2022-07-21 16:32:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:32:49,597 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 517 transitions. [2022-07-21 16:32:49,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:32:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 517 transitions. [2022-07-21 16:32:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 16:32:49,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:32:49,599 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 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, 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, 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] [2022-07-21 16:32:49,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:32:49,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:32:49,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:32:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:32:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1736163635, now seen corresponding path program 2 times [2022-07-21 16:32:49,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:32:49,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714974865] [2022-07-21 16:32:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:32:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:32:49,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:32:49,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649989888] [2022-07-21 16:32:49,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:32:49,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:32:49,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:32:49,864 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:32:49,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:32:54,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:32:54,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:32:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 16:32:54,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:32:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:32:54,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:32:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 16:32:54,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:32:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714974865] [2022-07-21 16:32:54,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 16:32:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649989888] [2022-07-21 16:32:54,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649989888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:32:54,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:32:54,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-07-21 16:32:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769870801] [2022-07-21 16:32:54,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:32:54,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 16:32:54,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:32:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 16:32:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-07-21 16:32:54,901 INFO L87 Difference]: Start difference. First operand 422 states and 517 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:32:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:32:55,359 INFO L93 Difference]: Finished difference Result 804 states and 997 transitions. [2022-07-21 16:32:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 16:32:55,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-07-21 16:32:55,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:32:55,362 INFO L225 Difference]: With dead ends: 804 [2022-07-21 16:32:55,362 INFO L226 Difference]: Without dead ends: 437 [2022-07-21 16:32:55,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2022-07-21 16:32:55,364 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 37 mSDsluCounter, 1941 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:32:55,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2189 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:32:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-07-21 16:32:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 431. [2022-07-21 16:32:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 417 states have (on average 1.2278177458033572) internal successors, (512), 424 states have internal predecessors, (512), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 16:32:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 529 transitions. [2022-07-21 16:32:55,376 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 529 transitions. Word has length 124 [2022-07-21 16:32:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:32:55,376 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 529 transitions. [2022-07-21 16:32:55,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:32:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 529 transitions. [2022-07-21 16:32:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-21 16:32:55,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:32:55,377 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 2, 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, 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, 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] [2022-07-21 16:32:55,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:32:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 16:32:55,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 16:32:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:32:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash -399861817, now seen corresponding path program 3 times [2022-07-21 16:32:55,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:32:55,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279924906] [2022-07-21 16:32:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:32:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:32:55,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 16:32:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653602311] [2022-07-21 16:32:55,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:32:55,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:32:55,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:32:55,641 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:32:55,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process