/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:56:34,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:56:34,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:56:34,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 23:56:34,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 23:56:34,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 23:56:34,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 23:56:34,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 23:56:34,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 23:56:34,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 23:56:34,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 23:56:34,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 23:56:34,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 23:56:34,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 23:56:34,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 23:56:34,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 23:56:34,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 23:56:34,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 23:56:34,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 23:56:34,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 23:56:34,297 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 23:56:34,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 23:56:34,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 23:56:34,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 23:56:34,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 23:56:34,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 23:56:34,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 23:56:34,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 23:56:34,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 23:56:34,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 23:56:34,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 23:56:34,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 23:56:34,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 23:56:34,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 23:56:34,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 23:56:34,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 23:56:34,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 23:56:34,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 23:56:34,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 23:56:34,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 23:56:34,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 23:56:34,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 23:56:34,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:56:34,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:56:34,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:56:34,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:56:34,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:56:34,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:56:34,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:56:34,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:56:34,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:56:34,335 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:56:34,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:56:34,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:56:34,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:56:34,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:56:34,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:56:34,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:56:34,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:56:34,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:56:34,337 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:56:34,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:56:34,337 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:56:34,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:56:34,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:56:34,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:56:34,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:56:34,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:56:34,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:56:34,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:56:34,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:56:34,522 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:56:34,522 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:56:34,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2022-03-19 23:56:34,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537f8d321/4b741511cecc4fc080d8a2b3dc5d85a3/FLAG7708b4e07 [2022-03-19 23:56:34,914 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:56:34,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2022-03-19 23:56:34,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537f8d321/4b741511cecc4fc080d8a2b3dc5d85a3/FLAG7708b4e07 [2022-03-19 23:56:34,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537f8d321/4b741511cecc4fc080d8a2b3dc5d85a3 [2022-03-19 23:56:34,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:56:34,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:56:34,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:56:34,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:56:34,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:56:34,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:56:34" (1/1) ... [2022-03-19 23:56:34,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77398499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:34, skipping insertion in model container [2022-03-19 23:56:34,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:56:34" (1/1) ... [2022-03-19 23:56:34,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:56:34,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:56:35,076 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c[525,538] [2022-03-19 23:56:35,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:56:35,115 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:56:35,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c[525,538] [2022-03-19 23:56:35,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:56:35,141 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:56:35,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35 WrapperNode [2022-03-19 23:56:35,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:56:35,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:56:35,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:56:35,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:56:35,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (1/1) ... [2022-03-19 23:56:35,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (1/1) ... [2022-03-19 23:56:35,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (1/1) ... [2022-03-19 23:56:35,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (1/1) ... [2022-03-19 23:56:35,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (1/1) ... [2022-03-19 23:56:35,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (1/1) ... [2022-03-19 23:56:35,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (1/1) ... [2022-03-19 23:56:35,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:56:35,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:56:35,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:56:35,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:56:35,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (1/1) ... [2022-03-19 23:56:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:56:35,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:35,187 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) [2022-03-19 23:56:35,204 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 [2022-03-19 23:56:35,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:56:35,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:56:35,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:56:35,225 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 23:56:35,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:56:35,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:56:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:56:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:56:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:56:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:56:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 23:56:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 23:56:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:56:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:56:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:56:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:56:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:56:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:56:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:56:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:56:35,268 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:56:35,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:56:35,419 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:56:35,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:56:35,423 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 23:56:35,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:56:35 BoogieIcfgContainer [2022-03-19 23:56:35,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:56:35,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:56:35,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:56:35,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:56:35,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:56:34" (1/3) ... [2022-03-19 23:56:35,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0bee6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:56:35, skipping insertion in model container [2022-03-19 23:56:35,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:35" (2/3) ... [2022-03-19 23:56:35,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0bee6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:56:35, skipping insertion in model container [2022-03-19 23:56:35,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:56:35" (3/3) ... [2022-03-19 23:56:35,447 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.c [2022-03-19 23:56:35,450 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:56:35,450 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:56:35,498 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:56:35,507 INFO L340 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 [2022-03-19 23:56:35,507 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:56:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 23:56:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:56:35,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:35,530 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:35,530 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2022-03-19 23:56:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:35,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117334086] [2022-03-19 23:56:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:35,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:35,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:35,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 23:56:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:56:35,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:35,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117334086] [2022-03-19 23:56:35,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117334086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:35,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:35,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:56:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280085915] [2022-03-19 23:56:35,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:35,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:56:35,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:56:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:56:35,738 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:56:37,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:38,565 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-03-19 23:56:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:56:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 23:56:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:38,571 INFO L225 Difference]: With dead ends: 69 [2022-03-19 23:56:38,571 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 23:56:38,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:56:38,575 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:38,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 23:56:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 23:56:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 23:56:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 23:56:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-03-19 23:56:38,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-03-19 23:56:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:38,602 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-03-19 23:56:38,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:56:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-03-19 23:56:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 23:56:38,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:38,604 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:38,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:56:38,604 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2022-03-19 23:56:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:38,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493451078] [2022-03-19 23:56:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:38,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:38,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:38,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:38,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 23:56:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:56:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:38,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493451078] [2022-03-19 23:56:38,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493451078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:38,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:38,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 23:56:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981559517] [2022-03-19 23:56:38,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:38,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:56:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:56:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:56:38,768 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:56:44,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:47,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:47,191 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-03-19 23:56:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 23:56:47,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-19 23:56:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:47,193 INFO L225 Difference]: With dead ends: 68 [2022-03-19 23:56:47,193 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 23:56:47,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:56:47,194 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 52 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:47,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 197 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-03-19 23:56:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 23:56:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 23:56:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 23:56:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-03-19 23:56:47,206 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-03-19 23:56:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:47,207 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-03-19 23:56:47,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:56:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-03-19 23:56:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 23:56:47,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:47,208 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:47,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:56:47,208 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2022-03-19 23:56:47,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:47,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630752197] [2022-03-19 23:56:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:47,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:47,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:47,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 23:56:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:56:47,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:47,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630752197] [2022-03-19 23:56:47,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630752197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:47,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:47,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 23:56:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408010077] [2022-03-19 23:56:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:47,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:56:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:56:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:56:47,422 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:56:53,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:55,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:55,358 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2022-03-19 23:56:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 23:56:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-19 23:56:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:55,361 INFO L225 Difference]: With dead ends: 76 [2022-03-19 23:56:55,361 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 23:56:55,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:56:55,362 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:55,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 50 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 218 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-03-19 23:56:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 23:56:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-03-19 23:56:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 32 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 23:56:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 100 transitions. [2022-03-19 23:56:55,376 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 100 transitions. Word has length 26 [2022-03-19 23:56:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:55,376 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 100 transitions. [2022-03-19 23:56:55,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:56:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 100 transitions. [2022-03-19 23:56:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 23:56:55,377 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:55,377 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:55,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:56:55,377 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2000886032, now seen corresponding path program 1 times [2022-03-19 23:56:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:55,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432983642] [2022-03-19 23:56:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:55,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:55,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:55,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688571411] [2022-03-19 23:56:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:55,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:55,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:55,389 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) [2022-03-19 23:56:55,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:56:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:56:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:56:55,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:56:55,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432983642] [2022-03-19 23:56:55,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:56:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688571411] [2022-03-19 23:56:55,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688571411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:55,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:55,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:56:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517498826] [2022-03-19 23:56:55,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:55,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:56:55,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:56:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:56:55,599 INFO L87 Difference]: Start difference. First operand 69 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:56:56,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:56:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:57,477 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2022-03-19 23:56:57,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:56:57,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 23:56:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:57,479 INFO L225 Difference]: With dead ends: 80 [2022-03-19 23:56:57,479 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 23:56:57,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:56:57,480 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:57,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 23:56:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 23:56:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-19 23:56:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 26 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 23:56:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2022-03-19 23:56:57,490 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 34 [2022-03-19 23:56:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:57,503 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2022-03-19 23:56:57,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:56:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2022-03-19 23:56:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 23:56:57,504 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:57,504 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:57,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 23:56:57,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:57,705 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:57,706 INFO L85 PathProgramCache]: Analyzing trace with hash -965267381, now seen corresponding path program 1 times [2022-03-19 23:56:57,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:57,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457427910] [2022-03-19 23:56:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:57,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:57,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134145973] [2022-03-19 23:56:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:57,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:57,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:57,716 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) [2022-03-19 23:56:57,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:56:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:56:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 23:56:57,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:56:57,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457427910] [2022-03-19 23:56:57,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:56:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134145973] [2022-03-19 23:56:57,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134145973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:57,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:57,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:56:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614033348] [2022-03-19 23:56:57,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:57,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:56:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:56:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:56:57,864 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:56:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:58,475 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-03-19 23:56:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:56:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-19 23:56:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:58,477 INFO L225 Difference]: With dead ends: 67 [2022-03-19 23:56:58,477 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 23:56:58,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:56:58,478 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:58,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:56:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 23:56:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-19 23:56:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 23:56:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-03-19 23:56:58,486 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 36 [2022-03-19 23:56:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:58,486 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-03-19 23:56:58,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:56:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-03-19 23:56:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:56:58,487 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:58,488 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:58,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 23:56:58,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:58,688 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1670386034, now seen corresponding path program 1 times [2022-03-19 23:56:58,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:58,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461564183] [2022-03-19 23:56:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:58,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:58,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:58,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821165641] [2022-03-19 23:56:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:58,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:58,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:58,705 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) [2022-03-19 23:56:58,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process