./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/array-fpi/eqn1.c -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 14bc2dbf7c29b1d0f6a0a1f7aa323adbc9855e56ce7f667c86a31ecee97dcbe0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:26:35,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:26:35,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:26:35,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:26:35,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:26:35,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:26:35,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:26:35,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:26:35,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:26:35,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:26:35,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:26:35,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:26:35,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:26:35,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:26:35,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:26:35,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:26:35,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:26:35,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:26:35,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:26:35,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:26:35,177 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:26:35,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:26:35,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:26:35,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:26:35,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:26:35,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:26:35,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:26:35,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:26:35,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:26:35,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:26:35,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:26:35,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:26:35,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:26:35,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:26:35,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:26:35,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:26:35,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:26:35,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:26:35,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:26:35,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:26:35,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:26:35,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:26:35,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:26:35,224 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:26:35,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:26:35,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:26:35,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:26:35,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:26:35,226 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:26:35,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:26:35,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:26:35,227 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:26:35,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:26:35,228 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:26:35,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:26:35,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:26:35,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:26:35,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:26:35,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:26:35,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:26:35,229 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:26:35,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:26:35,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:26:35,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:26:35,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:26:35,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:26:35,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:26:35,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:26:35,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:26:35,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:26:35,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:26:35,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:26:35,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:26:35,232 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:26:35,233 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:26:35,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:26:35,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14bc2dbf7c29b1d0f6a0a1f7aa323adbc9855e56ce7f667c86a31ecee97dcbe0 [2022-07-19 10:26:35,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:26:35,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:26:35,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:26:35,501 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:26:35,502 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:26:35,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn1.c [2022-07-19 10:26:35,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eae881f1/5c9e63f3c10a46eab998af87c6a50a69/FLAGe9b303631 [2022-07-19 10:26:35,931 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:26:35,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c [2022-07-19 10:26:35,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eae881f1/5c9e63f3c10a46eab998af87c6a50a69/FLAGe9b303631 [2022-07-19 10:26:35,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eae881f1/5c9e63f3c10a46eab998af87c6a50a69 [2022-07-19 10:26:35,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:26:35,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:26:35,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:26:35,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:26:35,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:26:35,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:26:35" (1/1) ... [2022-07-19 10:26:35,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb1116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:35, skipping insertion in model container [2022-07-19 10:26:35,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:26:35" (1/1) ... [2022-07-19 10:26:35,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:26:35,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:26:36,091 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/array-fpi/eqn1.c[587,600] [2022-07-19 10:26:36,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:26:36,112 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:26:36,122 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/array-fpi/eqn1.c[587,600] [2022-07-19 10:26:36,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:26:36,138 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:26:36,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36 WrapperNode [2022-07-19 10:26:36,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:26:36,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:26:36,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:26:36,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:26:36,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,175 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-07-19 10:26:36,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:26:36,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:26:36,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:26:36,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:26:36,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:26:36,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:26:36,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:26:36,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:26:36,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (1/1) ... [2022-07-19 10:26:36,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:26:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:36,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:26:36,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 10:26:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:26:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:26:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:26:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:26:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:26:36,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:26:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:26:36,368 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:26:36,369 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:26:36,480 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:26:36,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:26:36,488 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 10:26:36,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:26:36 BoogieIcfgContainer [2022-07-19 10:26:36,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:26:36,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:26:36,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:26:36,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:26:36,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:26:35" (1/3) ... [2022-07-19 10:26:36,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adc624d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:26:36, skipping insertion in model container [2022-07-19 10:26:36,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:26:36" (2/3) ... [2022-07-19 10:26:36,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adc624d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:26:36, skipping insertion in model container [2022-07-19 10:26:36,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:26:36" (3/3) ... [2022-07-19 10:26:36,495 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn1.c [2022-07-19 10:26:36,507 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:26:36,507 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:26:36,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:26:36,553 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e821983, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a67ecb7 [2022-07-19 10:26:36,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:26:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 10:26:36,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:36,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:36,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-07-19 10:26:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886848546] [2022-07-19 10:26:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:26:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:36,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:36,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886848546] [2022-07-19 10:26:36,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886848546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:26:36,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:26:36,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:26:36,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383921391] [2022-07-19 10:26:36,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:26:36,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:26:36,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:36,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:26:36,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:26:36,735 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:36,746 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-19 10:26:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:26:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 10:26:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:36,754 INFO L225 Difference]: With dead ends: 38 [2022-07-19 10:26:36,754 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 10:26:36,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:26:36,760 INFO L413 NwaCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:36,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:26:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 10:26:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-19 10:26:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-19 10:26:36,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-07-19 10:26:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:36,782 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-19 10:26:36,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-19 10:26:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 10:26:36,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:36,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:36,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:26:36,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-07-19 10:26:36,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:36,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535156092] [2022-07-19 10:26:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:36,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:36,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642028986] [2022-07-19 10:26:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:36,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:36,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:36,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:36,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:26:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:26:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 10:26:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:37,032 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-19 10:26:37,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-07-19 10:26:37,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:37,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:37,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-19 10:26:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:37,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:26:37,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:37,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535156092] [2022-07-19 10:26:37,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:37,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642028986] [2022-07-19 10:26:37,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642028986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:26:37,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:26:37,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:26:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403144835] [2022-07-19 10:26:37,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:26:37,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:26:37,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:37,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:26:37,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:26:37,248 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:37,327 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-19 10:26:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:26:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 10:26:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:37,333 INFO L225 Difference]: With dead ends: 34 [2022-07-19 10:26:37,333 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 10:26:37,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:26:37,337 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:37,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:26:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 10:26:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-19 10:26:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-19 10:26:37,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-19 10:26:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:37,344 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-19 10:26:37,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-19 10:26:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:26:37,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:37,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:37,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 10:26:37,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:37,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2022-07-19 10:26:37,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:37,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275536802] [2022-07-19 10:26:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:37,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:37,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:37,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504650976] [2022-07-19 10:26:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:37,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:37,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:37,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:37,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:26:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:26:37,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:26:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:37,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:26:37,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:37,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275536802] [2022-07-19 10:26:37,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:37,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504650976] [2022-07-19 10:26:37,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504650976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:26:37,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:26:37,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:26:37,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873423508] [2022-07-19 10:26:37,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:26:37,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:26:37,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:37,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:26:37,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:26:37,668 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:37,720 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-19 10:26:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:26:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:26:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:37,722 INFO L225 Difference]: With dead ends: 49 [2022-07-19 10:26:37,722 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 10:26:37,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:26:37,723 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:37,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:26:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 10:26:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-07-19 10:26:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-19 10:26:37,728 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-07-19 10:26:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:37,728 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-19 10:26:37,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-19 10:26:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:26:37,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:37,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:37,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:37,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 10:26:37,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-07-19 10:26:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:37,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824098529] [2022-07-19 10:26:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:37,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:37,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846002374] [2022-07-19 10:26:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:37,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:37,992 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:38,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:26:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:26:38,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:26:38,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:38,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:38,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:38,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824098529] [2022-07-19 10:26:38,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:38,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846002374] [2022-07-19 10:26:38,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846002374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:38,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:38,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-19 10:26:38,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219142115] [2022-07-19 10:26:38,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:38,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:26:38,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:38,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:26:38,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:26:38,121 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:38,204 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-19 10:26:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:26:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:26:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:38,206 INFO L225 Difference]: With dead ends: 44 [2022-07-19 10:26:38,206 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:26:38,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:26:38,209 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:38,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:26:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:26:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-07-19 10:26:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-19 10:26:38,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-07-19 10:26:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:38,226 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-19 10:26:38,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-19 10:26:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:26:38,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:38,227 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:38,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:38,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:38,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2022-07-19 10:26:38,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:38,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761653144] [2022-07-19 10:26:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:38,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:38,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:38,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769971002] [2022-07-19 10:26:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:38,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:38,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:38,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:38,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:26:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:26:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 10:26:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:38,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:26:38,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761653144] [2022-07-19 10:26:38,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769971002] [2022-07-19 10:26:38,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769971002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:26:38,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:26:38,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:26:38,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751401667] [2022-07-19 10:26:38,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:26:38,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:26:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:26:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:26:38,575 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:38,636 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-07-19 10:26:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:26:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 10:26:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:38,638 INFO L225 Difference]: With dead ends: 41 [2022-07-19 10:26:38,638 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 10:26:38,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:26:38,639 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:38,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:26:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 10:26:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-19 10:26:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-19 10:26:38,642 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2022-07-19 10:26:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:38,642 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-19 10:26:38,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-19 10:26:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:26:38,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:38,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:38,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:38,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:38,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:38,860 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-07-19 10:26:38,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:38,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958720647] [2022-07-19 10:26:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:38,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:38,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:38,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821633207] [2022-07-19 10:26:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:38,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:38,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:38,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:38,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:26:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:26:38,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 10:26:38,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:39,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-19 10:26:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:39,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-07-19 10:26:39,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:39,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:26:39,055 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-19 10:26:39,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 10:26:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:39,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:39,222 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_147) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-07-19 10:26:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-19 10:26:39,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958720647] [2022-07-19 10:26:39,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821633207] [2022-07-19 10:26:39,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821633207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:39,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:39,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-19 10:26:39,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280832776] [2022-07-19 10:26:39,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:39,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:26:39,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:26:39,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2022-07-19 10:26:39,234 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:39,339 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-07-19 10:26:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:26:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 10:26:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:39,356 INFO L225 Difference]: With dead ends: 35 [2022-07-19 10:26:39,356 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 10:26:39,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=110, Unknown=1, NotChecked=22, Total=182 [2022-07-19 10:26:39,357 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:39,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 65 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-07-19 10:26:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 10:26:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2022-07-19 10:26:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-19 10:26:39,360 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2022-07-19 10:26:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:39,360 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-19 10:26:39,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-19 10:26:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:26:39,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:39,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:39,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:39,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:39,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:39,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2022-07-19 10:26:39,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:39,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247075163] [2022-07-19 10:26:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:39,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:39,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:39,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196016464] [2022-07-19 10:26:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:26:39,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:39,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:39,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:39,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:26:39,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:26:39,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:26:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:26:39,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:39,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:39,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:39,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247075163] [2022-07-19 10:26:39,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:39,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196016464] [2022-07-19 10:26:39,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196016464] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:39,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:39,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:26:39,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909280977] [2022-07-19 10:26:39,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:39,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:26:39,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:26:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:26:39,785 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:39,906 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-07-19 10:26:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:26:39,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-19 10:26:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:39,907 INFO L225 Difference]: With dead ends: 60 [2022-07-19 10:26:39,908 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 10:26:39,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:26:39,909 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:39,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 37 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:26:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 10:26:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-07-19 10:26:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-19 10:26:39,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-07-19 10:26:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:39,913 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-19 10:26:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:39,914 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-19 10:26:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:26:39,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:39,914 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:39,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:40,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:40,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-07-19 10:26:40,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:40,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193684808] [2022-07-19 10:26:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:40,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:40,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467645152] [2022-07-19 10:26:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:40,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:40,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:40,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:40,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:26:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:26:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 10:26:40,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:40,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-19 10:26:40,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:40,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-07-19 10:26:40,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-07-19 10:26:40,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:40,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:40,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:40,326 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:26:40,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-07-19 10:26:40,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:40,373 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:26:40,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-07-19 10:26:40,519 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:26:40,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 32 [2022-07-19 10:26:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:40,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:40,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193684808] [2022-07-19 10:26:40,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467645152] [2022-07-19 10:26:40,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467645152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:40,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:40,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-07-19 10:26:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841853313] [2022-07-19 10:26:40,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:40,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:26:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:40,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:26:40,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:26:40,934 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:41,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:41,106 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-07-19 10:26:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:26:41,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:26:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:41,107 INFO L225 Difference]: With dead ends: 39 [2022-07-19 10:26:41,107 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:26:41,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:26:41,108 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:41,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-07-19 10:26:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:26:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-19 10:26:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-19 10:26:41,112 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2022-07-19 10:26:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:41,113 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-19 10:26:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-19 10:26:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:26:41,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:41,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:41,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:41,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:41,333 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2022-07-19 10:26:41,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:41,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769924416] [2022-07-19 10:26:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:41,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:41,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383322488] [2022-07-19 10:26:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:26:41,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:41,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:41,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:41,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:26:41,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:26:41,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:26:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 10:26:41,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:41,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-19 10:26:41,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:41,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-07-19 10:26:41,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:41,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:26:41,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:26:41,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:41,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:26:41,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:41,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 10:26:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:41,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:41,931 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_270) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-07-19 10:26:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-07-19 10:26:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:41,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769924416] [2022-07-19 10:26:41,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:41,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383322488] [2022-07-19 10:26:41,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383322488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:41,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:41,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-19 10:26:41,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011926403] [2022-07-19 10:26:41,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:41,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 10:26:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 10:26:41,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=129, Unknown=1, NotChecked=24, Total=210 [2022-07-19 10:26:41,945 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:42,175 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-07-19 10:26:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 10:26:42,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:26:42,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:42,177 INFO L225 Difference]: With dead ends: 70 [2022-07-19 10:26:42,177 INFO L226 Difference]: Without dead ends: 68 [2022-07-19 10:26:42,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=375, Unknown=1, NotChecked=42, Total=552 [2022-07-19 10:26:42,178 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:42,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 74 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 73 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-07-19 10:26:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-19 10:26:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2022-07-19 10:26:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-07-19 10:26:42,184 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 20 [2022-07-19 10:26:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:42,184 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-07-19 10:26:42,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-07-19 10:26:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:26:42,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:42,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:42,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:42,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 10:26:42,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash 986773582, now seen corresponding path program 2 times [2022-07-19 10:26:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:42,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880283446] [2022-07-19 10:26:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:42,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:42,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670206574] [2022-07-19 10:26:42,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:26:42,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:42,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:42,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:42,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:26:42,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:26:42,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:26:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:26:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:26:42,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:26:42,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880283446] [2022-07-19 10:26:42,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:42,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670206574] [2022-07-19 10:26:42,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670206574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:42,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:42,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:26:42,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245000187] [2022-07-19 10:26:42,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:42,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:26:42,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:42,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:26:42,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:26:42,570 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:42,781 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-07-19 10:26:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:26:42,782 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 10:26:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:42,782 INFO L225 Difference]: With dead ends: 68 [2022-07-19 10:26:42,782 INFO L226 Difference]: Without dead ends: 59 [2022-07-19 10:26:42,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:26:42,783 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:42,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 71 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:26:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-19 10:26:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2022-07-19 10:26:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-07-19 10:26:42,788 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2022-07-19 10:26:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:42,788 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-07-19 10:26:42,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-07-19 10:26:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:26:42,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:42,789 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:42,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:42,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 10:26:42,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 3 times [2022-07-19 10:26:43,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:43,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750318148] [2022-07-19 10:26:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:43,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:43,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:43,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968400010] [2022-07-19 10:26:43,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:26:43,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:43,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:43,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:26:43,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:26:43,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:26:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 10:26:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:26:43,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:26:43,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:43,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750318148] [2022-07-19 10:26:43,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:43,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968400010] [2022-07-19 10:26:43,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968400010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:43,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:43,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-19 10:26:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034186109] [2022-07-19 10:26:43,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:43,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:26:43,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:26:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:26:43,219 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:43,339 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-07-19 10:26:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:26:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:26:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:43,340 INFO L225 Difference]: With dead ends: 63 [2022-07-19 10:26:43,340 INFO L226 Difference]: Without dead ends: 43 [2022-07-19 10:26:43,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:26:43,341 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:43,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 60 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:26:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-19 10:26:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-07-19 10:26:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-19 10:26:43,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 24 [2022-07-19 10:26:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:43,345 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-19 10:26:43,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-19 10:26:43,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:26:43,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:43,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:43,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:43,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 10:26:43,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 4 times [2022-07-19 10:26:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060384681] [2022-07-19 10:26:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:43,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:43,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:43,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573795601] [2022-07-19 10:26:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:26:43,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:43,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:43,579 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:26:43,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:26:43,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:26:43,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:26:43,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 10:26:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:43,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-19 10:26:43,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-07-19 10:26:43,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:43,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 10:26:43,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,839 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:26:43,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-07-19 10:26:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,873 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:26:43,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-07-19 10:26:43,924 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:26:43,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-19 10:26:43,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:26:43,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2022-07-19 10:26:43,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:43,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 115 [2022-07-19 10:26:44,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:44,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:44,047 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:26:44,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2022-07-19 10:26:44,161 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:26:44,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 32 [2022-07-19 10:26:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:44,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:45,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060384681] [2022-07-19 10:26:45,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573795601] [2022-07-19 10:26:45,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573795601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:45,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:45,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2022-07-19 10:26:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698432557] [2022-07-19 10:26:45,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:45,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:26:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:26:45,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:26:45,991 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:46,290 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-07-19 10:26:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 10:26:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:26:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:46,291 INFO L225 Difference]: With dead ends: 63 [2022-07-19 10:26:46,291 INFO L226 Difference]: Without dead ends: 61 [2022-07-19 10:26:46,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:26:46,292 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:46,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 69 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-07-19 10:26:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-19 10:26:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-07-19 10:26:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-19 10:26:46,299 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 24 [2022-07-19 10:26:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:46,299 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-19 10:26:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-19 10:26:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:26:46,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:46,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:46,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:46,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 10:26:46,522 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:46,523 INFO L85 PathProgramCache]: Analyzing trace with hash -900609774, now seen corresponding path program 4 times [2022-07-19 10:26:46,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:46,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994880184] [2022-07-19 10:26:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:46,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:46,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:46,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995823027] [2022-07-19 10:26:46,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:26:46,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:46,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:46,560 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) [2022-07-19 10:26:46,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:26:46,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:26:46,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:26:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 10:26:46,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:46,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:46,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:26:46,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994880184] [2022-07-19 10:26:46,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:26:46,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995823027] [2022-07-19 10:26:46,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995823027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:46,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:26:46,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-19 10:26:46,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689036887] [2022-07-19 10:26:46,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 10:26:46,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 10:26:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:26:46,783 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:26:47,063 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2022-07-19 10:26:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:26:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:26:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:26:47,064 INFO L225 Difference]: With dead ends: 133 [2022-07-19 10:26:47,064 INFO L226 Difference]: Without dead ends: 112 [2022-07-19 10:26:47,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2022-07-19 10:26:47,066 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:26:47,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 94 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:26:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-19 10:26:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2022-07-19 10:26:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-07-19 10:26:47,073 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 24 [2022-07-19 10:26:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:26:47,074 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-07-19 10:26:47,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:26:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-07-19 10:26:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:26:47,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:26:47,078 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:26:47,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 10:26:47,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 10:26:47,292 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:26:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:26:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 5 times [2022-07-19 10:26:47,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:26:47,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19266098] [2022-07-19 10:26:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:26:47,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:26:47,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:26:47,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055312203] [2022-07-19 10:26:47,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:26:47,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:26:47,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:26:47,308 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) [2022-07-19 10:26:47,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 10:26:53,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 10:26:53,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:26:53,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 10:26:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:26:53,743 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-19 10:26:53,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-07-19 10:26:53,763 INFO L356 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-07-19 10:26:53,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2022-07-19 10:26:53,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:53,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:26:53,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2022-07-19 10:26:53,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-19 10:26:53,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2022-07-19 10:26:53,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:26:53,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 19 treesize of output 3 [2022-07-19 10:26:53,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:26:53,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2022-07-19 10:26:53,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-19 10:26:53,944 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:26:53,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2022-07-19 10:26:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:53,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:26:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:53,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-19 10:26:53,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 10:26:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,051 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:26:54,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2022-07-19 10:26:54,149 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:26:54,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 137 [2022-07-19 10:26:54,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:26:54,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-07-19 10:26:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 101 [2022-07-19 10:26:54,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:26:54,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:26:54,282 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 10:26:54,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 56 [2022-07-19 10:26:54,555 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-19 10:26:54,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 50 [2022-07-19 10:26:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:26:54,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:03,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:27:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19266098] [2022-07-19 10:27:03,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:27:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055312203] [2022-07-19 10:27:03,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055312203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:27:03,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:27:03,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-07-19 10:27:03,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068477498] [2022-07-19 10:27:03,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:27:03,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 10:27:03,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:27:03,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 10:27:03,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=493, Unknown=1, NotChecked=0, Total=600 [2022-07-19 10:27:03,899 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:27:04,770 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-07-19 10:27:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 10:27:04,770 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 10:27:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:27:04,771 INFO L225 Difference]: With dead ends: 82 [2022-07-19 10:27:04,771 INFO L226 Difference]: Without dead ends: 53 [2022-07-19 10:27:04,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=167, Invalid=762, Unknown=1, NotChecked=0, Total=930 [2022-07-19 10:27:04,772 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:27:04,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-07-19 10:27:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-19 10:27:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-19 10:27:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-07-19 10:27:04,779 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 28 [2022-07-19 10:27:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:27:04,779 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-07-19 10:27:04,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-07-19 10:27:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:27:04,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:27:04,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:27:04,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 10:27:04,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 10:27:04,991 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:27:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:27:04,991 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 6 times [2022-07-19 10:27:04,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:27:04,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169524015] [2022-07-19 10:27:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:27:04,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:27:05,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:27:05,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338510797] [2022-07-19 10:27:05,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:27:05,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:27:05,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:27:05,027 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) [2022-07-19 10:27:05,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 10:27:05,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 10:27:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:27:05,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-19 10:27:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:27:05,679 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-19 10:27:05,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-07-19 10:27:05,702 INFO L356 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-07-19 10:27:05,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2022-07-19 10:27:05,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:27:05,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-19 10:27:05,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-19 10:27:05,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2022-07-19 10:27:05,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:05,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 19 treesize of output 3 [2022-07-19 10:27:05,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 32 [2022-07-19 10:27:05,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 10:27:05,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:05,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2022-07-19 10:27:05,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-19 10:27:05,894 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:27:05,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2022-07-19 10:27:05,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:05,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:05,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:05,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:05,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:05,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:05,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:05,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-19 10:27:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,050 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:27:06,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2022-07-19 10:27:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,143 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:27:06,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2022-07-19 10:27:06,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:27:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,341 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-07-19 10:27:06,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 44 [2022-07-19 10:27:06,446 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:27:06,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 80 [2022-07-19 10:27:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,476 INFO L356 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2022-07-19 10:27:06,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 107 [2022-07-19 10:27:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,521 INFO L356 Elim1Store]: treesize reduction 66, result has 33.3 percent of original size [2022-07-19 10:27:06,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 43 [2022-07-19 10:27:06,763 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 10:27:06,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 96 [2022-07-19 10:27:06,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,787 INFO L356 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2022-07-19 10:27:06,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 125 [2022-07-19 10:27:06,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:27:06,859 INFO L356 Elim1Store]: treesize reduction 66, result has 33.3 percent of original size [2022-07-19 10:27:06,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 59 [2022-07-19 10:27:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:27:07,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:27:22,275 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:28:47,971 WARN L233 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 128 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:29:00,032 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:29:09,309 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:29:20,249 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:29:35,939 WARN L233 SmtUtils]: Spent 13.17s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:29:46,750 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:30:30,588 WARN L233 SmtUtils]: Spent 16.11s on a formula simplification. DAG size of input: 206 DAG size of output: 158 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:30:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:30:30,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:30:30,621 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 10:30:30,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 1 [2022-07-19 10:30:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:30:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:30:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169524015] [2022-07-19 10:30:30,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:30:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338510797] [2022-07-19 10:30:30,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338510797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:30:30,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:30:30,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-07-19 10:30:30,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22661267] [2022-07-19 10:30:30,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:30:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 10:30:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:30:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 10:30:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1137, Unknown=27, NotChecked=0, Total=1406 [2022-07-19 10:30:30,627 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:31:05,842 WARN L233 SmtUtils]: Spent 22.83s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)