./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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_BER_test9-1.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 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 17:43:53,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 17:43:53,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 17:43:53,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 17:43:53,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 17:43:53,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 17:43:53,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 17:43:53,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 17:43:53,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 17:43:53,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 17:43:53,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 17:43:53,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 17:43:53,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 17:43:53,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 17:43:53,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 17:43:53,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 17:43:53,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 17:43:53,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 17:43:53,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 17:43:53,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 17:43:53,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 17:43:53,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 17:43:53,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 17:43:53,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 17:43:53,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 17:43:53,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 17:43:53,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 17:43:53,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 17:43:53,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 17:43:53,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 17:43:53,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 17:43:53,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 17:43:53,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 17:43:53,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 17:43:53,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 17:43:53,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 17:43:53,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 17:43:53,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 17:43:53,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 17:43:53,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 17:43:53,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 17:43:53,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 17:43:53,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 17:43:53,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 17:43:53,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 17:43:53,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 17:43:53,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 17:43:53,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 17:43:53,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 17:43:53,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 17:43:53,287 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 17:43:53,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 17:43:53,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 17:43:53,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 17:43:53,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 17:43:53,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 17:43:53,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 17:43:53,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 17:43:53,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 17:43:53,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 17:43:53,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 17:43:53,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 17:43:53,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 17:43:53,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 17:43:53,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 17:43:53,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 17:43:53,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 17:43:53,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 17:43:53,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 17:43:53,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 17:43:53,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 17:43:53,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 17:43:53,291 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 17:43:53,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 17:43:53,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 17:43:53,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 17:43:53,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 [2021-12-21 17:43:53,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 17:43:53,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 17:43:53,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 17:43:53,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 17:43:53,448 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 17:43:53,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2021-12-21 17:43:53,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2e0869b2/30cab23eea2b43edbadf17a86941d6fa/FLAGe27f7e1c4 [2021-12-21 17:43:53,949 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 17:43:53,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2021-12-21 17:43:53,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2e0869b2/30cab23eea2b43edbadf17a86941d6fa/FLAGe27f7e1c4 [2021-12-21 17:43:54,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2e0869b2/30cab23eea2b43edbadf17a86941d6fa [2021-12-21 17:43:54,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 17:43:54,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 17:43:54,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 17:43:54,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 17:43:54,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 17:43:54,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:54,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb6547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54, skipping insertion in model container [2021-12-21 17:43:54,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:54,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 17:43:54,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 17:43:54,625 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_BER_test9-1.i[33021,33034] [2021-12-21 17:43:54,776 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_BER_test9-1.i[84583,84596] [2021-12-21 17:43:54,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 17:43:54,787 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 17:43:54,813 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_BER_test9-1.i[33021,33034] [2021-12-21 17:43:54,900 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_BER_test9-1.i[84583,84596] [2021-12-21 17:43:54,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 17:43:54,925 INFO L208 MainTranslator]: Completed translation [2021-12-21 17:43:54,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54 WrapperNode [2021-12-21 17:43:54,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 17:43:54,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 17:43:54,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 17:43:54,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 17:43:54,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:54,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,106 INFO L137 Inliner]: procedures = 177, calls = 730, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2864 [2021-12-21 17:43:55,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 17:43:55,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 17:43:55,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 17:43:55,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 17:43:55,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 17:43:55,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 17:43:55,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 17:43:55,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 17:43:55,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (1/1) ... [2021-12-21 17:43:55,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 17:43:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:43:55,286 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) [2021-12-21 17:43:55,288 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 [2021-12-21 17:43:55,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 17:43:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 17:43:55,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 17:43:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 17:43:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-21 17:43:55,311 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-21 17:43:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 17:43:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 17:43:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 17:43:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 17:43:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-21 17:43:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 17:43:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 17:43:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 17:43:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 17:43:55,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 17:43:55,474 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 17:43:55,475 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 17:43:56,740 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 17:43:56,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 17:43:56,750 INFO L299 CfgBuilder]: Removed 54 assume(true) statements. [2021-12-21 17:43:56,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:43:56 BoogieIcfgContainer [2021-12-21 17:43:56,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 17:43:56,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 17:43:56,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 17:43:56,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 17:43:56,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 05:43:54" (1/3) ... [2021-12-21 17:43:56,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7084637f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:43:56, skipping insertion in model container [2021-12-21 17:43:56,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:43:54" (2/3) ... [2021-12-21 17:43:56,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7084637f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:43:56, skipping insertion in model container [2021-12-21 17:43:56,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:43:56" (3/3) ... [2021-12-21 17:43:56,757 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test9-1.i [2021-12-21 17:43:56,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 17:43:56,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 17:43:56,791 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 17:43:56,795 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 17:43:56,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 17:43:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 1167 states, 659 states have (on average 1.922610015174507) internal successors, (1267), 1161 states have internal predecessors, (1267), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-21 17:43:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 17:43:56,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:43:56,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:43:56,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:43:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:43:56,859 INFO L85 PathProgramCache]: Analyzing trace with hash -858764483, now seen corresponding path program 1 times [2021-12-21 17:43:56,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:43:56,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432814861] [2021-12-21 17:43:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:43:56,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:43:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:43:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:43:56,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:43:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432814861] [2021-12-21 17:43:56,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432814861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:43:56,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:43:56,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 17:43:56,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777117294] [2021-12-21 17:43:56,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:43:56,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 17:43:56,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:43:57,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 17:43:57,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 17:43:57,024 INFO L87 Difference]: Start difference. First operand has 1167 states, 659 states have (on average 1.922610015174507) internal successors, (1267), 1161 states have internal predecessors, (1267), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) 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) [2021-12-21 17:43:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:43:57,146 INFO L93 Difference]: Finished difference Result 2332 states and 5044 transitions. [2021-12-21 17:43:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 17:43:57,148 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 [2021-12-21 17:43:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:43:57,172 INFO L225 Difference]: With dead ends: 2332 [2021-12-21 17:43:57,172 INFO L226 Difference]: Without dead ends: 1163 [2021-12-21 17:43:57,181 INFO L932 BasicCegarLoop]: 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 [2021-12-21 17:43:57,184 INFO L933 BasicCegarLoop]: 2213 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, 2213 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:43:57,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:43:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-12-21 17:43:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-12-21 17:43:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.833841463414634) internal successors, (1203), 1157 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-21 17:43:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2209 transitions. [2021-12-21 17:43:57,433 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2209 transitions. Word has length 9 [2021-12-21 17:43:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:43:57,433 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 2209 transitions. [2021-12-21 17:43:57,434 INFO L471 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) [2021-12-21 17:43:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2209 transitions. [2021-12-21 17:43:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 17:43:57,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:43:57,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:43:57,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 17:43:57,436 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:43:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:43:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash -293931519, now seen corresponding path program 1 times [2021-12-21 17:43:57,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:43:57,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343388191] [2021-12-21 17:43:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:43:57,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:43:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:43:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:43:57,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:43:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343388191] [2021-12-21 17:43:57,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343388191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:43:57,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:43:57,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 17:43:57,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114680899] [2021-12-21 17:43:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:43:57,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:43:57,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:43:57,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:43:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:43:57,516 INFO L87 Difference]: Start difference. First operand 1163 states and 2209 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-12-21 17:43:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:43:58,329 INFO L93 Difference]: Finished difference Result 3333 states and 6429 transitions. [2021-12-21 17:43:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:43:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2021-12-21 17:43:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:43:58,341 INFO L225 Difference]: With dead ends: 3333 [2021-12-21 17:43:58,341 INFO L226 Difference]: Without dead ends: 2264 [2021-12-21 17:43:58,346 INFO L932 BasicCegarLoop]: 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 [2021-12-21 17:43:58,347 INFO L933 BasicCegarLoop]: 2673 mSDtfsCounter, 1128 mSDsluCounter, 4315 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 6988 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 17:43:58,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 6988 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 17:43:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-12-21 17:43:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1165. [2021-12-21 17:43:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 658 states have (on average 1.831306990881459) internal successors, (1205), 1159 states have internal predecessors, (1205), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-21 17:43:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2211 transitions. [2021-12-21 17:43:58,578 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2211 transitions. Word has length 44 [2021-12-21 17:43:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:43:58,578 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2211 transitions. [2021-12-21 17:43:58,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-12-21 17:43:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2211 transitions. [2021-12-21 17:43:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 17:43:58,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:43:58,581 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:43:58,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 17:43:58,582 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:43:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:43:58,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1509497837, now seen corresponding path program 1 times [2021-12-21 17:43:58,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:43:58,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451067808] [2021-12-21 17:43:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:43:58,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:43:58,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:43:58,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389171571] [2021-12-21 17:43:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:43:58,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:43:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:43:58,677 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) [2021-12-21 17:43:58,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 17:43:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:43:59,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 17:43:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:43:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:43:59,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:43:59,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:43:59,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451067808] [2021-12-21 17:43:59,280 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:43:59,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389171571] [2021-12-21 17:43:59,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389171571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:43:59,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:43:59,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 17:43:59,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015664283] [2021-12-21 17:43:59,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:43:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 17:43:59,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:43:59,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 17:43:59,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:43:59,282 INFO L87 Difference]: Start difference. First operand 1165 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-12-21 17:43:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:43:59,382 INFO L93 Difference]: Finished difference Result 2347 states and 4449 transitions. [2021-12-21 17:43:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 17:43:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-12-21 17:43:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:43:59,388 INFO L225 Difference]: With dead ends: 2347 [2021-12-21 17:43:59,389 INFO L226 Difference]: Without dead ends: 1186 [2021-12-21 17:43:59,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:43:59,394 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 9 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4363 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 [2021-12-21 17:43:59,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4363 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:43:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-12-21 17:43:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1185. [2021-12-21 17:43:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 678 states have (on average 1.8067846607669618) internal successors, (1225), 1179 states have internal predecessors, (1225), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-21 17:43:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2231 transitions. [2021-12-21 17:43:59,515 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2231 transitions. Word has length 96 [2021-12-21 17:43:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:43:59,515 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 2231 transitions. [2021-12-21 17:43:59,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-12-21 17:43:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2231 transitions. [2021-12-21 17:43:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 17:43:59,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:43:59,517 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:43:59,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 17:43:59,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:43:59,731 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:43:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:43:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1482432235, now seen corresponding path program 1 times [2021-12-21 17:43:59,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:43:59,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583774020] [2021-12-21 17:43:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:43:59,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:43:59,830 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:43:59,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437177061] [2021-12-21 17:43:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:43:59,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:43:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:43:59,835 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) [2021-12-21 17:43:59,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 17:44:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:44:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 17:44:00,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:44:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 17:44:00,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:44:00,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:44:00,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583774020] [2021-12-21 17:44:00,431 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:44:00,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437177061] [2021-12-21 17:44:00,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437177061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:44:00,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:44:00,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 17:44:00,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145264212] [2021-12-21 17:44:00,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:44:00,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 17:44:00,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:44:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 17:44:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:44:00,433 INFO L87 Difference]: Start difference. First operand 1185 states and 2231 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-12-21 17:44:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:44:00,508 INFO L93 Difference]: Finished difference Result 2274 states and 4348 transitions. [2021-12-21 17:44:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 17:44:00,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 96 [2021-12-21 17:44:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:44:00,515 INFO L225 Difference]: With dead ends: 2274 [2021-12-21 17:44:00,515 INFO L226 Difference]: Without dead ends: 1206 [2021-12-21 17:44:00,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:44:00,520 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 8 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4365 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 [2021-12-21 17:44:00,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4365 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:44:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-12-21 17:44:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1205. [2021-12-21 17:44:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 698 states have (on average 1.7836676217765044) internal successors, (1245), 1199 states have internal predecessors, (1245), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-21 17:44:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2251 transitions. [2021-12-21 17:44:00,619 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2251 transitions. Word has length 96 [2021-12-21 17:44:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:44:00,620 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 2251 transitions. [2021-12-21 17:44:00,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-12-21 17:44:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2251 transitions. [2021-12-21 17:44:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 17:44:00,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:44:00,621 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:44:00,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 17:44:00,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 17:44:00,840 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:44:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:44:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1801417811, now seen corresponding path program 1 times [2021-12-21 17:44:00,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:44:00,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639754910] [2021-12-21 17:44:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:00,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:44:00,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:44:00,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245093675] [2021-12-21 17:44:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:00,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:44:00,948 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) [2021-12-21 17:44:01,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 17:44:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:44:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 17:44:01,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:44:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:44:01,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:44:01,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:44:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639754910] [2021-12-21 17:44:01,762 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:44:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245093675] [2021-12-21 17:44:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245093675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:44:01,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:44:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 17:44:01,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572317322] [2021-12-21 17:44:01,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:44:01,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:44:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:44:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:44:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:44:01,764 INFO L87 Difference]: Start difference. First operand 1205 states and 2251 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-21 17:44:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:44:01,849 INFO L93 Difference]: Finished difference Result 2398 states and 4490 transitions. [2021-12-21 17:44:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:44:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2021-12-21 17:44:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:44:01,855 INFO L225 Difference]: With dead ends: 2398 [2021-12-21 17:44:01,855 INFO L226 Difference]: Without dead ends: 1197 [2021-12-21 17:44:01,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 17:44:01,859 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 1182 mSDsluCounter, 2697 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 4886 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 [2021-12-21 17:44:01,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1685 Valid, 4886 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:44:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-21 17:44:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1191. [2021-12-21 17:44:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 684 states have (on average 1.7894736842105263) internal successors, (1224), 1185 states have internal predecessors, (1224), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-21 17:44:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2230 transitions. [2021-12-21 17:44:01,987 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2230 transitions. Word has length 96 [2021-12-21 17:44:01,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:44:01,988 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 2230 transitions. [2021-12-21 17:44:01,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-21 17:44:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2230 transitions. [2021-12-21 17:44:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 17:44:01,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:44:01,991 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:44:02,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 17:44:02,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:02,212 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:44:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:44:02,213 INFO L85 PathProgramCache]: Analyzing trace with hash 432450363, now seen corresponding path program 1 times [2021-12-21 17:44:02,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:44:02,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999915890] [2021-12-21 17:44:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:02,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:44:02,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:44:02,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135422717] [2021-12-21 17:44:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:02,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:02,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:44:02,288 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) [2021-12-21 17:44:02,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 17:44:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:44:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 17:44:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:44:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 17:44:03,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:44:03,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:44:03,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999915890] [2021-12-21 17:44:03,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:44:03,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135422717] [2021-12-21 17:44:03,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135422717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:44:03,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:44:03,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 17:44:03,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250876808] [2021-12-21 17:44:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:44:03,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 17:44:03,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:44:03,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 17:44:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 17:44:03,023 INFO L87 Difference]: Start difference. First operand 1191 states and 2230 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2021-12-21 17:44:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:44:03,135 INFO L93 Difference]: Finished difference Result 2271 states and 4328 transitions. [2021-12-21 17:44:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:44:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 96 [2021-12-21 17:44:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:44:03,141 INFO L225 Difference]: With dead ends: 2271 [2021-12-21 17:44:03,141 INFO L226 Difference]: Without dead ends: 1183 [2021-12-21 17:44:03,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 17:44:03,144 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 1076 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:44:03,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 4973 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:44:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-12-21 17:44:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1177. [2021-12-21 17:44:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 670 states have (on average 1.7955223880597015) internal successors, (1203), 1171 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-21 17:44:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2209 transitions. [2021-12-21 17:44:03,268 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2209 transitions. Word has length 96 [2021-12-21 17:44:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:44:03,268 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2209 transitions. [2021-12-21 17:44:03,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2021-12-21 17:44:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2209 transitions. [2021-12-21 17:44:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 17:44:03,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:44:03,269 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:44:03,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 17:44:03,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:03,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:44:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:44:03,477 INFO L85 PathProgramCache]: Analyzing trace with hash -725158097, now seen corresponding path program 1 times [2021-12-21 17:44:03,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:44:03,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571119895] [2021-12-21 17:44:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:03,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:44:03,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:44:03,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469152517] [2021-12-21 17:44:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:03,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:03,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:44:03,538 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) [2021-12-21 17:44:03,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 17:44:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:44:04,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 17:44:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:44:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:44:04,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:44:04,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:44:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571119895] [2021-12-21 17:44:04,382 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:44:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469152517] [2021-12-21 17:44:04,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469152517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:44:04,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:44:04,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 17:44:04,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282204916] [2021-12-21 17:44:04,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:44:04,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 17:44:04,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:44:04,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 17:44:04,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:44:04,384 INFO L87 Difference]: Start difference. First operand 1177 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-12-21 17:44:04,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:44:04,504 INFO L93 Difference]: Finished difference Result 3446 states and 6522 transitions. [2021-12-21 17:44:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 17:44:04,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-12-21 17:44:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:44:04,514 INFO L225 Difference]: With dead ends: 3446 [2021-12-21 17:44:04,514 INFO L226 Difference]: Without dead ends: 2273 [2021-12-21 17:44:04,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:44:04,519 INFO L933 BasicCegarLoop]: 2736 mSDtfsCounter, 1065 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 4911 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:44:04,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 4911 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:44:04,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-12-21 17:44:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2271. [2021-12-21 17:44:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 1264 states have (on average 1.8259493670886076) internal successors, (2308), 2265 states have internal predecessors, (2308), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-12-21 17:44:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 4314 transitions. [2021-12-21 17:44:04,740 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 4314 transitions. Word has length 96 [2021-12-21 17:44:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:44:04,741 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 4314 transitions. [2021-12-21 17:44:04,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-12-21 17:44:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 4314 transitions. [2021-12-21 17:44:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 17:44:04,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:44:04,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:44:04,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 17:44:04,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:04,955 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:44:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:44:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 372571869, now seen corresponding path program 1 times [2021-12-21 17:44:04,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:44:04,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669542620] [2021-12-21 17:44:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:04,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:44:04,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:44:04,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522709709] [2021-12-21 17:44:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:04,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:04,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:44:05,008 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) [2021-12-21 17:44:05,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 17:44:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:44:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 17:44:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:44:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 17:44:05,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:44:05,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:44:05,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669542620] [2021-12-21 17:44:05,668 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:44:05,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522709709] [2021-12-21 17:44:05,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522709709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:44:05,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:44:05,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 17:44:05,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086401130] [2021-12-21 17:44:05,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:44:05,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:44:05,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:44:05,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:44:05,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:44:05,671 INFO L87 Difference]: Start difference. First operand 2271 states and 4314 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) [2021-12-21 17:44:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:44:07,051 INFO L93 Difference]: Finished difference Result 3444 states and 6519 transitions. [2021-12-21 17:44:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:44:07,065 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 [2021-12-21 17:44:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:44:07,073 INFO L225 Difference]: With dead ends: 3444 [2021-12-21 17:44:07,073 INFO L226 Difference]: Without dead ends: 1221 [2021-12-21 17:44:07,078 INFO L932 BasicCegarLoop]: 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 [2021-12-21 17:44:07,079 INFO L933 BasicCegarLoop]: 2201 mSDtfsCounter, 2254 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 17:44:07,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 3272 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 17:44:07,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-12-21 17:44:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2021-12-21 17:44:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 714 states have (on average 1.7507002801120448) internal successors, (1250), 1215 states have internal predecessors, (1250), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-21 17:44:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2256 transitions. [2021-12-21 17:44:07,181 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2256 transitions. Word has length 111 [2021-12-21 17:44:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:44:07,181 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2256 transitions. [2021-12-21 17:44:07,181 INFO L471 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) [2021-12-21 17:44:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2256 transitions. [2021-12-21 17:44:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 17:44:07,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:44:07,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:44:07,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 17:44:07,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:07,399 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:44:07,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:44:07,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2029466899, now seen corresponding path program 1 times [2021-12-21 17:44:07,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:44:07,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434984126] [2021-12-21 17:44:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:07,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:44:07,429 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:44:07,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72801340] [2021-12-21 17:44:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:07,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:07,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:44:07,431 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) [2021-12-21 17:44:07,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 17:44:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:44:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 17:44:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:44:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:44:08,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:44:08,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:44:08,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434984126] [2021-12-21 17:44:08,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:44:08,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72801340] [2021-12-21 17:44:08,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72801340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:44:08,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:44:08,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 17:44:08,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202901867] [2021-12-21 17:44:08,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:44:08,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:44:08,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:44:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:44:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:44:08,310 INFO L87 Difference]: Start difference. First operand 1221 states and 2256 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) [2021-12-21 17:44:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:44:08,370 INFO L93 Difference]: Finished difference Result 2394 states and 4461 transitions. [2021-12-21 17:44:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:44:08,371 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 [2021-12-21 17:44:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:44:08,377 INFO L225 Difference]: With dead ends: 2394 [2021-12-21 17:44:08,377 INFO L226 Difference]: Without dead ends: 1224 [2021-12-21 17:44:08,381 INFO L932 BasicCegarLoop]: 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 [2021-12-21 17:44:08,383 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 2 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6569 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 [2021-12-21 17:44:08,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6569 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:44:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-12-21 17:44:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1224. [2021-12-21 17:44:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 716 states have (on average 1.75) internal successors, (1253), 1218 states have internal predecessors, (1253), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-21 17:44:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2260 transitions. [2021-12-21 17:44:08,498 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2260 transitions. Word has length 118 [2021-12-21 17:44:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:44:08,499 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2260 transitions. [2021-12-21 17:44:08,499 INFO L471 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) [2021-12-21 17:44:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2260 transitions. [2021-12-21 17:44:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-21 17:44:08,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:44:08,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:44:08,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 17:44:08,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:08,715 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:44:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:44:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash -629194827, now seen corresponding path program 1 times [2021-12-21 17:44:08,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:44:08,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447649031] [2021-12-21 17:44:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:08,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:44:08,749 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:44:08,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158468711] [2021-12-21 17:44:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:08,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:08,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:44:08,751 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) [2021-12-21 17:44:08,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 17:44:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:44:09,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 17:44:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:44:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 17:44:09,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:44:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 17:44:10,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:44:10,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447649031] [2021-12-21 17:44:10,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:44:10,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158468711] [2021-12-21 17:44:10,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158468711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:44:10,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 17:44:10,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 17:44:10,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159646921] [2021-12-21 17:44:10,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 17:44:10,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 17:44:10,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:44:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 17:44:10,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 17:44:10,059 INFO L87 Difference]: Start difference. First operand 1224 states and 2260 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) [2021-12-21 17:44:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:44:10,233 INFO L93 Difference]: Finished difference Result 2408 states and 4482 transitions. [2021-12-21 17:44:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 17:44:10,233 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 [2021-12-21 17:44:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:44:10,239 INFO L225 Difference]: With dead ends: 2408 [2021-12-21 17:44:10,239 INFO L226 Difference]: Without dead ends: 1233 [2021-12-21 17:44:10,243 INFO L932 BasicCegarLoop]: 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 [2021-12-21 17:44:10,243 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 13 mSDsluCounter, 8747 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 10938 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:44:10,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 10938 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:44:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-12-21 17:44:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1233. [2021-12-21 17:44:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 724 states have (on average 1.7472375690607735) internal successors, (1265), 1226 states have internal predecessors, (1265), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-21 17:44:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2272 transitions. [2021-12-21 17:44:10,401 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2272 transitions. Word has length 120 [2021-12-21 17:44:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:44:10,401 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 2272 transitions. [2021-12-21 17:44:10,402 INFO L471 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) [2021-12-21 17:44:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2272 transitions. [2021-12-21 17:44:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 17:44:10,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:44:10,403 INFO L514 BasicCegarLoop]: 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] [2021-12-21 17:44:10,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 17:44:10,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 17:44:10,611 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:44:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:44:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2085572205, now seen corresponding path program 2 times [2021-12-21 17:44:10,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:44:10,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408354868] [2021-12-21 17:44:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:10,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:44:10,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:44:10,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076711150] [2021-12-21 17:44:10,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 17:44:10,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:10,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:44:10,646 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) [2021-12-21 17:44:10,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 17:44:11,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 17:44:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:44:11,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 17:44:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:44:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 17:44:11,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:44:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 17:44:11,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:44:11,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408354868] [2021-12-21 17:44:11,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:44:11,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076711150] [2021-12-21 17:44:11,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076711150] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:44:11,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 17:44:11,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-12-21 17:44:11,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123422676] [2021-12-21 17:44:11,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 17:44:11,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 17:44:11,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:44:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 17:44:11,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-21 17:44:11,783 INFO L87 Difference]: Start difference. First operand 1233 states and 2272 transitions. Second operand has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 17:44:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:44:12,094 INFO L93 Difference]: Finished difference Result 2421 states and 4500 transitions. [2021-12-21 17:44:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 17:44:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 124 [2021-12-21 17:44:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:44:12,100 INFO L225 Difference]: With dead ends: 2421 [2021-12-21 17:44:12,100 INFO L226 Difference]: Without dead ends: 1248 [2021-12-21 17:44:12,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-12-21 17:44:12,104 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 50 mSDsluCounter, 10941 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 13132 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:44:12,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 13132 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:44:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-12-21 17:44:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1239. [2021-12-21 17:44:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 730 states have (on average 1.7465753424657535) internal successors, (1275), 1232 states have internal predecessors, (1275), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-21 17:44:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 2282 transitions. [2021-12-21 17:44:12,246 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 2282 transitions. Word has length 124 [2021-12-21 17:44:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:44:12,246 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 2282 transitions. [2021-12-21 17:44:12,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 17:44:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 2282 transitions. [2021-12-21 17:44:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 17:44:12,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:44:12,247 INFO L514 BasicCegarLoop]: trace histogram [12, 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] [2021-12-21 17:44:12,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 17:44:12,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:12,465 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:44:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:44:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1444899181, now seen corresponding path program 3 times [2021-12-21 17:44:12,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:44:12,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51520673] [2021-12-21 17:44:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:44:12,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:44:12,499 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:44:12,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358939262] [2021-12-21 17:44:12,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 17:44:12,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:44:12,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:44:12,500 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) [2021-12-21 17:44:12,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process