./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_FNV_test10-1.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 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:10:26,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:10:26,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:10:26,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:10:26,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:10:26,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:10:26,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:10:26,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:10:26,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:10:26,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:10:26,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:10:26,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:10:26,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:10:26,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:10:26,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:10:26,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:10:26,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:10:26,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:10:26,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:10:26,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:10:26,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:10:26,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:10:26,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:10:26,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:10:26,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:10:26,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:10:26,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:10:26,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:10:26,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:10:26,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:10:26,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:10:26,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:10:26,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:10:26,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:10:26,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:10:26,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:10:26,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:10:26,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:10:26,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:10:26,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:10:26,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:10:26,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 16:10:26,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:10:26,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:10:26,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:10:26,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:10:26,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:10:26,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:10:26,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:10:26,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:10:26,356 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:10:26,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:10:26,357 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:10:26,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:10:26,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:10:26,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:10:26,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 16:10:26,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:10:26,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 16:10:26,358 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:10:26,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 16:10:26,358 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:10:26,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 16:10:26,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:10:26,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:10:26,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:10:26,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:10:26,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:10:26,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:10:26,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 16:10:26,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:10:26,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:10:26,361 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 16:10:26,361 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 16:10:26,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 16:10:26,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:10:26,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 [2021-12-22 16:10:26,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:10:26,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:10:26,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:10:26,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:10:26,625 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:10:26,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2021-12-22 16:10:26,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48c74c656/6d46ff1ea0ed4a54b61f723b58ebdfd4/FLAG49f6ee941 [2021-12-22 16:10:27,171 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:10:27,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2021-12-22 16:10:27,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48c74c656/6d46ff1ea0ed4a54b61f723b58ebdfd4/FLAG49f6ee941 [2021-12-22 16:10:27,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48c74c656/6d46ff1ea0ed4a54b61f723b58ebdfd4 [2021-12-22 16:10:27,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:10:27,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:10:27,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:10:27,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:10:27,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:10:27,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:10:27" (1/1) ... [2021-12-22 16:10:27,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fcd4704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:27, skipping insertion in model container [2021-12-22 16:10:27,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:10:27" (1/1) ... [2021-12-22 16:10:27,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:10:27,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:10:27,906 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_FNV_test10-1.i[33022,33035] [2021-12-22 16:10:28,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:10:28,119 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:10:28,146 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_FNV_test10-1.i[33022,33035] [2021-12-22 16:10:28,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:10:28,290 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:10:28,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28 WrapperNode [2021-12-22 16:10:28,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:10:28,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:10:28,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:10:28,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:10:28,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,426 INFO L137 Inliner]: procedures = 177, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2175 [2021-12-22 16:10:28,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:10:28,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:10:28,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:10:28,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:10:28,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:10:28,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:10:28,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:10:28,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:10:28,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (1/1) ... [2021-12-22 16:10:28,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:10:28,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:28,616 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) [2021-12-22 16:10:28,618 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 [2021-12-22 16:10:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-22 16:10:28,651 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-22 16:10:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:10:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 16:10:28,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 16:10:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:10:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 16:10:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 16:10:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:10:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:10:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:10:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:10:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 16:10:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:10:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:10:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:10:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:10:28,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:10:28,942 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:10:28,951 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:10:30,203 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:10:30,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:10:30,211 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2021-12-22 16:10:30,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:10:30 BoogieIcfgContainer [2021-12-22 16:10:30,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:10:30,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:10:30,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:10:30,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:10:30,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:10:27" (1/3) ... [2021-12-22 16:10:30,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6903c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:10:30, skipping insertion in model container [2021-12-22 16:10:30,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:10:28" (2/3) ... [2021-12-22 16:10:30,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6903c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:10:30, skipping insertion in model container [2021-12-22 16:10:30,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:10:30" (3/3) ... [2021-12-22 16:10:30,221 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test10-1.i [2021-12-22 16:10:30,225 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:10:30,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 16:10:30,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:10:30,272 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 [2021-12-22 16:10:30,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 16:10:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 428 states, 409 states have (on average 1.7114914425427872) internal successors, (700), 414 states have internal predecessors, (700), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-22 16:10:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 16:10:30,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:30,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:10:30,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash -982002177, now seen corresponding path program 1 times [2021-12-22 16:10:30,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:30,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777785696] [2021-12-22 16:10:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:30,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:10:30,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:30,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777785696] [2021-12-22 16:10:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777785696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:30,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:30,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:10:30,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133907010] [2021-12-22 16:10:30,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:30,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 16:10:30,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 16:10:30,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:10:30,449 INFO L87 Difference]: Start difference. First operand has 428 states, 409 states have (on average 1.7114914425427872) internal successors, (700), 414 states have internal predecessors, (700), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:30,498 INFO L93 Difference]: Finished difference Result 854 states and 1462 transitions. [2021-12-22 16:10:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 16:10:30,500 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 16:10:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:30,509 INFO L225 Difference]: With dead ends: 854 [2021-12-22 16:10:30,509 INFO L226 Difference]: Without dead ends: 424 [2021-12-22 16:10:30,513 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 [2021-12-22 16:10:30,515 INFO L933 BasicCegarLoop]: 569 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, 569 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 [2021-12-22 16:10:30,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:30,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-22 16:10:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2021-12-22 16:10:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 411 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-22 16:10:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 565 transitions. [2021-12-22 16:10:30,593 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 565 transitions. Word has length 13 [2021-12-22 16:10:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:30,593 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 565 transitions. [2021-12-22 16:10:30,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 565 transitions. [2021-12-22 16:10:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 16:10:30,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:30,596 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, 1, 1, 1, 1] [2021-12-22 16:10:30,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:10:30,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1194795813, now seen corresponding path program 1 times [2021-12-22 16:10:30,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:30,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365295358] [2021-12-22 16:10:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:30,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:10:30,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365295358] [2021-12-22 16:10:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365295358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:30,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:30,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:10:30,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430061793] [2021-12-22 16:10:30,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:30,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:10:30,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:10:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:10:30,711 INFO L87 Difference]: Start difference. First operand 424 states and 565 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:31,226 INFO L93 Difference]: Finished difference Result 745 states and 997 transitions. [2021-12-22 16:10:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:10:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-22 16:10:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:31,230 INFO L225 Difference]: With dead ends: 745 [2021-12-22 16:10:31,230 INFO L226 Difference]: Without dead ends: 499 [2021-12-22 16:10:31,231 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 [2021-12-22 16:10:31,232 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 96 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:10:31,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1479 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 16:10:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-22 16:10:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 426. [2021-12-22 16:10:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 408 states have (on average 1.3235294117647058) internal successors, (540), 413 states have internal predecessors, (540), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-22 16:10:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 567 transitions. [2021-12-22 16:10:31,249 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 567 transitions. Word has length 48 [2021-12-22 16:10:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:31,249 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 567 transitions. [2021-12-22 16:10:31,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 567 transitions. [2021-12-22 16:10:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:10:31,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:31,253 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, 1, 1, 1, 1, 1] [2021-12-22 16:10:31,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:10:31,253 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:31,254 INFO L85 PathProgramCache]: Analyzing trace with hash 834821079, now seen corresponding path program 1 times [2021-12-22 16:10:31,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:31,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244079518] [2021-12-22 16:10:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:31,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:31,372 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:31,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598203529] [2021-12-22 16:10:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:31,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:31,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:31,387 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) [2021-12-22 16:10:31,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:10:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:10:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:10:32,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:32,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:32,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244079518] [2021-12-22 16:10:32,146 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:32,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598203529] [2021-12-22 16:10:32,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598203529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:32,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:32,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:10:32,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537568805] [2021-12-22 16:10:32,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:32,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:10:32,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:32,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:10:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:32,148 INFO L87 Difference]: Start difference. First operand 426 states and 567 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:32,202 INFO L93 Difference]: Finished difference Result 869 states and 1161 transitions. [2021-12-22 16:10:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:10:32,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-22 16:10:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:32,205 INFO L225 Difference]: With dead ends: 869 [2021-12-22 16:10:32,205 INFO L226 Difference]: Without dead ends: 447 [2021-12-22 16:10:32,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:32,208 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 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 [2021-12-22 16:10:32,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-22 16:10:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2021-12-22 16:10:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 428 states have (on average 1.308411214953271) internal successors, (560), 433 states have internal predecessors, (560), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-22 16:10:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 587 transitions. [2021-12-22 16:10:32,217 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 587 transitions. Word has length 101 [2021-12-22 16:10:32,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:32,217 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 587 transitions. [2021-12-22 16:10:32,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 587 transitions. [2021-12-22 16:10:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:10:32,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:32,220 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, 1, 1, 1, 1, 1] [2021-12-22 16:10:32,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 16:10:32,441 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 [2021-12-22 16:10:32,442 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1892659157, now seen corresponding path program 1 times [2021-12-22 16:10:32,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:32,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845655697] [2021-12-22 16:10:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:32,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:32,518 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:32,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627894719] [2021-12-22 16:10:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:32,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:32,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:32,520 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) [2021-12-22 16:10:32,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:10:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:33,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:10:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:10:33,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:33,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:33,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845655697] [2021-12-22 16:10:33,377 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:33,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627894719] [2021-12-22 16:10:33,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627894719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:33,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:33,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:10:33,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396883522] [2021-12-22 16:10:33,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:33,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:10:33,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:33,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:10:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:33,384 INFO L87 Difference]: Start difference. First operand 446 states and 587 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:33,446 INFO L93 Difference]: Finished difference Result 701 states and 934 transitions. [2021-12-22 16:10:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:10:33,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-22 16:10:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:33,455 INFO L225 Difference]: With dead ends: 701 [2021-12-22 16:10:33,455 INFO L226 Difference]: Without dead ends: 467 [2021-12-22 16:10:33,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:33,457 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 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 [2021-12-22 16:10:33,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-22 16:10:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2021-12-22 16:10:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 448 states have (on average 1.2946428571428572) internal successors, (580), 453 states have internal predecessors, (580), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-22 16:10:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 607 transitions. [2021-12-22 16:10:33,473 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 607 transitions. Word has length 101 [2021-12-22 16:10:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:33,474 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 607 transitions. [2021-12-22 16:10:33,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 607 transitions. [2021-12-22 16:10:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:10:33,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:33,476 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, 1, 1, 1, 1, 1] [2021-12-22 16:10:33,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:33,694 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 [2021-12-22 16:10:33,694 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1673804439, now seen corresponding path program 1 times [2021-12-22 16:10:33,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:33,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134467108] [2021-12-22 16:10:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:33,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:33,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:33,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825524306] [2021-12-22 16:10:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:33,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:33,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:33,803 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) [2021-12-22 16:10:33,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:10:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:34,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:10:34,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:10:34,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:34,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134467108] [2021-12-22 16:10:34,550 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825524306] [2021-12-22 16:10:34,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825524306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:34,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:34,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:10:34,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312767311] [2021-12-22 16:10:34,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:34,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:10:34,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:10:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:10:34,552 INFO L87 Difference]: Start difference. First operand 466 states and 607 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:34,616 INFO L93 Difference]: Finished difference Result 1004 states and 1314 transitions. [2021-12-22 16:10:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:10:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-22 16:10:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:34,619 INFO L225 Difference]: With dead ends: 1004 [2021-12-22 16:10:34,619 INFO L226 Difference]: Without dead ends: 542 [2021-12-22 16:10:34,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:10:34,620 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 506 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1402 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 [2021-12-22 16:10:34,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1402 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-22 16:10:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2021-12-22 16:10:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 434 states have (on average 1.2880184331797235) internal successors, (559), 439 states have internal predecessors, (559), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-22 16:10:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2021-12-22 16:10:34,631 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 101 [2021-12-22 16:10:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:34,631 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2021-12-22 16:10:34,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2021-12-22 16:10:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:10:34,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:34,633 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, 1, 1, 1, 1, 1] [2021-12-22 16:10:34,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:34,871 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 [2021-12-22 16:10:34,871 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1567366363, now seen corresponding path program 1 times [2021-12-22 16:10:34,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:34,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324179212] [2021-12-22 16:10:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:34,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:34,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:34,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315458439] [2021-12-22 16:10:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:34,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:34,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:34,954 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) [2021-12-22 16:10:34,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:10:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:35,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:10:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:10:35,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:35,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:35,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324179212] [2021-12-22 16:10:35,874 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:35,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315458439] [2021-12-22 16:10:35,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315458439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:35,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:35,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:10:35,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743429411] [2021-12-22 16:10:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:35,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:10:35,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:10:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:10:35,877 INFO L87 Difference]: Start difference. First operand 452 states and 586 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:35,934 INFO L93 Difference]: Finished difference Result 675 states and 882 transitions. [2021-12-22 16:10:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:10:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-22 16:10:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:35,936 INFO L225 Difference]: With dead ends: 675 [2021-12-22 16:10:35,936 INFO L226 Difference]: Without dead ends: 439 [2021-12-22 16:10:35,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:10:35,938 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 287 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1308 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 [2021-12-22 16:10:35,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-22 16:10:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 438. [2021-12-22 16:10:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 420 states have (on average 1.2809523809523808) internal successors, (538), 425 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-22 16:10:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 565 transitions. [2021-12-22 16:10:35,947 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 565 transitions. Word has length 101 [2021-12-22 16:10:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:35,947 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 565 transitions. [2021-12-22 16:10:35,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 565 transitions. [2021-12-22 16:10:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:10:35,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:35,949 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, 1, 1, 1, 1, 1] [2021-12-22 16:10:35,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:36,171 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 [2021-12-22 16:10:36,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1090150057, now seen corresponding path program 1 times [2021-12-22 16:10:36,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457303483] [2021-12-22 16:10:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:36,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:36,241 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:36,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575584797] [2021-12-22 16:10:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:36,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:36,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:36,243 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) [2021-12-22 16:10:36,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:10:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:37,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:10:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:10:37,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:37,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:37,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457303483] [2021-12-22 16:10:37,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:37,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575584797] [2021-12-22 16:10:37,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575584797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:37,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:37,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:10:37,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058993376] [2021-12-22 16:10:37,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:37,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:10:37,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:37,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:10:37,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:37,280 INFO L87 Difference]: Start difference. First operand 438 states and 565 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:37,334 INFO L93 Difference]: Finished difference Result 1102 states and 1424 transitions. [2021-12-22 16:10:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:10:37,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-22 16:10:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:37,337 INFO L225 Difference]: With dead ends: 1102 [2021-12-22 16:10:37,337 INFO L226 Difference]: Without dead ends: 668 [2021-12-22 16:10:37,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:37,339 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 249 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:10:37,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-22 16:10:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 664. [2021-12-22 16:10:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2792511700468019) internal successors, (820), 646 states have internal predecessors, (820), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 16:10:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 857 transitions. [2021-12-22 16:10:37,355 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 857 transitions. Word has length 101 [2021-12-22 16:10:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:37,355 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 857 transitions. [2021-12-22 16:10:37,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:10:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 857 transitions. [2021-12-22 16:10:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 16:10:37,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:37,357 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] [2021-12-22 16:10:37,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:37,569 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 [2021-12-22 16:10:37,569 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 915182649, now seen corresponding path program 1 times [2021-12-22 16:10:37,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:37,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483906017] [2021-12-22 16:10:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:37,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:37,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:37,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249419222] [2021-12-22 16:10:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:37,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:37,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:37,606 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) [2021-12-22 16:10:37,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:10:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:38,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:10:38,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:38,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:10:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:10:38,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 16:10:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:10:38,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:38,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:38,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483906017] [2021-12-22 16:10:38,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:38,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249419222] [2021-12-22 16:10:38,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249419222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:38,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:38,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:10:38,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195595711] [2021-12-22 16:10:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:38,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:10:38,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:10:38,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:10:38,492 INFO L87 Difference]: Start difference. First operand 664 states and 857 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:10:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:39,281 INFO L93 Difference]: Finished difference Result 1238 states and 1596 transitions. [2021-12-22 16:10:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:10:39,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2021-12-22 16:10:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:39,284 INFO L225 Difference]: With dead ends: 1238 [2021-12-22 16:10:39,284 INFO L226 Difference]: Without dead ends: 664 [2021-12-22 16:10:39,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:10:39,285 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 96 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 16:10:39,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1857 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 16:10:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-22 16:10:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2021-12-22 16:10:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 646 states have internal predecessors, (819), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 16:10:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 856 transitions. [2021-12-22 16:10:39,302 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 856 transitions. Word has length 116 [2021-12-22 16:10:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:39,302 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 856 transitions. [2021-12-22 16:10:39,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:10:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 856 transitions. [2021-12-22 16:10:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 16:10:39,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:39,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:10:39,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:39,523 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 [2021-12-22 16:10:39,524 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1196561724, now seen corresponding path program 1 times [2021-12-22 16:10:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683579196] [2021-12-22 16:10:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:39,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:39,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:39,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032307956] [2021-12-22 16:10:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:39,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:39,626 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) [2021-12-22 16:10:39,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:10:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:10:40,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:10:40,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:40,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683579196] [2021-12-22 16:10:40,762 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032307956] [2021-12-22 16:10:40,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032307956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:40,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:40,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:10:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641018562] [2021-12-22 16:10:40,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:10:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:10:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:40,764 INFO L87 Difference]: Start difference. First operand 664 states and 856 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:10:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:40,819 INFO L93 Difference]: Finished difference Result 1352 states and 1753 transitions. [2021-12-22 16:10:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:10:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-22 16:10:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:40,822 INFO L225 Difference]: With dead ends: 1352 [2021-12-22 16:10:40,822 INFO L226 Difference]: Without dead ends: 706 [2021-12-22 16:10:40,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:40,823 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 9 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1047 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 [2021-12-22 16:10:40,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1047 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-12-22 16:10:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2021-12-22 16:10:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 681 states have (on average 1.261380323054332) internal successors, (859), 686 states have internal predecessors, (859), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 16:10:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 896 transitions. [2021-12-22 16:10:40,837 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 896 transitions. Word has length 163 [2021-12-22 16:10:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:40,837 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 896 transitions. [2021-12-22 16:10:40,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:10:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 896 transitions. [2021-12-22 16:10:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 16:10:40,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:40,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:10:40,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:41,059 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 [2021-12-22 16:10:41,060 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1167279938, now seen corresponding path program 1 times [2021-12-22 16:10:41,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:41,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051076089] [2021-12-22 16:10:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:41,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:41,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:41,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635258008] [2021-12-22 16:10:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:41,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:41,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:41,156 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) [2021-12-22 16:10:41,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:10:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:10:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:10:42,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:42,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051076089] [2021-12-22 16:10:42,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:42,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635258008] [2021-12-22 16:10:42,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635258008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:42,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:42,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:10:42,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371964055] [2021-12-22 16:10:42,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:42,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:10:42,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:10:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:10:42,285 INFO L87 Difference]: Start difference. First operand 704 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:10:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:42,337 INFO L93 Difference]: Finished difference Result 1346 states and 1718 transitions. [2021-12-22 16:10:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:10:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-22 16:10:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:42,340 INFO L225 Difference]: With dead ends: 1346 [2021-12-22 16:10:42,341 INFO L226 Difference]: Without dead ends: 678 [2021-12-22 16:10:42,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:10:42,342 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 492 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1099 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 [2021-12-22 16:10:42,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1099 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-22 16:10:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2021-12-22 16:10:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 653 states have (on average 1.2511485451761102) internal successors, (817), 658 states have internal predecessors, (817), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 16:10:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 854 transitions. [2021-12-22 16:10:42,357 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 854 transitions. Word has length 163 [2021-12-22 16:10:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:42,358 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 854 transitions. [2021-12-22 16:10:42,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:10:42,359 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 854 transitions. [2021-12-22 16:10:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 16:10:42,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:42,360 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:10:42,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:42,575 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 [2021-12-22 16:10:42,576 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1015565136, now seen corresponding path program 1 times [2021-12-22 16:10:42,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:42,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034401872] [2021-12-22 16:10:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:42,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:42,703 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:42,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121630881] [2021-12-22 16:10:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:42,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:42,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:42,719 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) [2021-12-22 16:10:42,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:10:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:10:43,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:10:44,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:44,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:44,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034401872] [2021-12-22 16:10:44,140 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:44,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121630881] [2021-12-22 16:10:44,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121630881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:44,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:44,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:10:44,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776032769] [2021-12-22 16:10:44,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:44,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:10:44,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:10:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:44,143 INFO L87 Difference]: Start difference. First operand 676 states and 854 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:10:44,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:44,190 INFO L93 Difference]: Finished difference Result 1533 states and 1962 transitions. [2021-12-22 16:10:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:10:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-22 16:10:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:44,193 INFO L225 Difference]: With dead ends: 1533 [2021-12-22 16:10:44,194 INFO L226 Difference]: Without dead ends: 915 [2021-12-22 16:10:44,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:10:44,195 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 220 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:10:44,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1064 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-12-22 16:10:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 813. [2021-12-22 16:10:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 787 states have (on average 1.2617534942820838) internal successors, (993), 792 states have internal predecessors, (993), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-22 16:10:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1036 transitions. [2021-12-22 16:10:44,212 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1036 transitions. Word has length 163 [2021-12-22 16:10:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:44,213 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1036 transitions. [2021-12-22 16:10:44,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:10:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1036 transitions. [2021-12-22 16:10:44,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-22 16:10:44,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:44,214 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:10:44,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:44,433 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 [2021-12-22 16:10:44,433 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:44,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1315037683, now seen corresponding path program 1 times [2021-12-22 16:10:44,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:44,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256787136] [2021-12-22 16:10:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:44,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:44,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495172105] [2021-12-22 16:10:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:44,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:44,506 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) [2021-12-22 16:10:44,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:10:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:10:45,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 16:10:45,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:45,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:45,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256787136] [2021-12-22 16:10:45,762 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:45,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495172105] [2021-12-22 16:10:45,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495172105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:45,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:45,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:10:45,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268754800] [2021-12-22 16:10:45,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:45,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:10:45,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:45,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:10:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:10:45,763 INFO L87 Difference]: Start difference. First operand 813 states and 1036 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:10:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:46,063 INFO L93 Difference]: Finished difference Result 1342 states and 1716 transitions. [2021-12-22 16:10:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:10:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 178 [2021-12-22 16:10:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:46,065 INFO L225 Difference]: With dead ends: 1342 [2021-12-22 16:10:46,066 INFO L226 Difference]: Without dead ends: 665 [2021-12-22 16:10:46,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:10:46,067 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 835 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:10:46,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 644 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:10:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-22 16:10:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2021-12-22 16:10:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 644 states have (on average 1.2468944099378882) internal successors, (803), 649 states have internal predecessors, (803), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 16:10:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 836 transitions. [2021-12-22 16:10:46,080 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 836 transitions. Word has length 178 [2021-12-22 16:10:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:46,081 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 836 transitions. [2021-12-22 16:10:46,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:10:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 836 transitions. [2021-12-22 16:10:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-22 16:10:46,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:46,082 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:10:46,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:46,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 16:10:46,292 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash -122605024, now seen corresponding path program 1 times [2021-12-22 16:10:46,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:46,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869602106] [2021-12-22 16:10:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:46,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:46,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:46,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770649374] [2021-12-22 16:10:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:46,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:46,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:46,344 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:10:46,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:10:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:47,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:10:47,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 16:10:47,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:10:47,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:47,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869602106] [2021-12-22 16:10:47,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:47,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770649374] [2021-12-22 16:10:47,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770649374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:10:47,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:10:47,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:10:47,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594624846] [2021-12-22 16:10:47,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:10:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:10:47,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:10:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:10:47,742 INFO L87 Difference]: Start difference. First operand 665 states and 836 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:10:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:47,808 INFO L93 Difference]: Finished difference Result 1281 states and 1624 transitions. [2021-12-22 16:10:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:10:47,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 185 [2021-12-22 16:10:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:47,811 INFO L225 Difference]: With dead ends: 1281 [2021-12-22 16:10:47,811 INFO L226 Difference]: Without dead ends: 668 [2021-12-22 16:10:47,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:10:47,813 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 2 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:10:47,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1607 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:10:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-22 16:10:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-12-22 16:10:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 646 states have (on average 1.2476780185758514) internal successors, (806), 652 states have internal predecessors, (806), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-22 16:10:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 842 transitions. [2021-12-22 16:10:47,831 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 842 transitions. Word has length 185 [2021-12-22 16:10:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:47,832 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 842 transitions. [2021-12-22 16:10:47,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:10:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 842 transitions. [2021-12-22 16:10:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-22 16:10:47,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:47,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:10:47,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:48,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 16:10:48,048 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1844388388, now seen corresponding path program 1 times [2021-12-22 16:10:48,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:48,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977045537] [2021-12-22 16:10:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:48,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:48,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496905514] [2021-12-22 16:10:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:48,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:48,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:48,110 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:10:48,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 16:10:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:10:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:10:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:10:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 16:10:49,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:10:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 16:10:50,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:10:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977045537] [2021-12-22 16:10:50,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:10:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496905514] [2021-12-22 16:10:50,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496905514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:10:50,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:10:50,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 16:10:50,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604510005] [2021-12-22 16:10:50,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:10:50,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:10:50,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:10:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:10:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:10:50,304 INFO L87 Difference]: Start difference. First operand 668 states and 842 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 16:10:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:10:50,482 INFO L93 Difference]: Finished difference Result 1295 states and 1650 transitions. [2021-12-22 16:10:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 16:10:50,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 189 [2021-12-22 16:10:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:10:50,486 INFO L225 Difference]: With dead ends: 1295 [2021-12-22 16:10:50,486 INFO L226 Difference]: Without dead ends: 677 [2021-12-22 16:10:50,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:10:50,488 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 12 mSDsluCounter, 3170 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3706 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:10:50,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3706 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:10:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-12-22 16:10:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2021-12-22 16:10:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 654 states have (on average 1.2507645259938838) internal successors, (818), 660 states have internal predecessors, (818), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-22 16:10:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 854 transitions. [2021-12-22 16:10:50,506 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 854 transitions. Word has length 189 [2021-12-22 16:10:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:10:50,507 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 854 transitions. [2021-12-22 16:10:50,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 16:10:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 854 transitions. [2021-12-22 16:10:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-22 16:10:50,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:10:50,510 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:10:50,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 16:10:50,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 16:10:50,724 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:10:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:10:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1936364000, now seen corresponding path program 2 times [2021-12-22 16:10:50,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:10:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424922780] [2021-12-22 16:10:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:10:50,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:10:50,782 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:10:50,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920225684] [2021-12-22 16:10:50,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:10:50,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:10:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:10:50,784 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:10:50,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 16:11:11,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:11:11,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:11:11,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:11:11,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:11:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 81 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 16:11:11,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:11:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 16:11:12,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:11:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424922780] [2021-12-22 16:11:12,155 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:11:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920225684] [2021-12-22 16:11:12,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920225684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:11:12,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:11:12,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-12-22 16:11:12,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563622716] [2021-12-22 16:11:12,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:11:12,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:11:12,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:11:12,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:11:12,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:11:12,158 INFO L87 Difference]: Start difference. First operand 677 states and 854 transitions. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 16:11:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:11:12,529 INFO L93 Difference]: Finished difference Result 1316 states and 1687 transitions. [2021-12-22 16:11:12,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 16:11:12,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 197 [2021-12-22 16:11:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:11:12,537 INFO L225 Difference]: With dead ends: 1316 [2021-12-22 16:11:12,538 INFO L226 Difference]: Without dead ends: 692 [2021-12-22 16:11:12,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:11:12,541 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 56 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3712 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:11:12,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 3712 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:11:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-12-22 16:11:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2021-12-22 16:11:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 660 states have (on average 1.2545454545454546) internal successors, (828), 666 states have internal predecessors, (828), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-22 16:11:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 864 transitions. [2021-12-22 16:11:12,561 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 864 transitions. Word has length 197 [2021-12-22 16:11:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:11:12,561 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 864 transitions. [2021-12-22 16:11:12,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 16:11:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 864 transitions. [2021-12-22 16:11:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-22 16:11:12,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:11:12,564 INFO L514 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:11:12,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:11:12,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 16:11:12,765 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:11:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:11:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1895281888, now seen corresponding path program 3 times [2021-12-22 16:11:12,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:11:12,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126500104] [2021-12-22 16:11:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:11:12,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:11:12,830 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:11:12,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936362967] [2021-12-22 16:11:12,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:11:12,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:11:12,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:11:12,831 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:11:12,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process