/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/reducercommutativity/rangesum40.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:11:21,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:11:21,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:11:21,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-30 22:11:21,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-30 22:11:21,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-30 22:11:21,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-30 22:11:21,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-30 22:11:21,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-30 22:11:21,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-30 22:11:21,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-30 22:11:21,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-30 22:11:21,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 22:11:21,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 22:11:21,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 22:11:21,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 22:11:21,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 22:11:21,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 22:11:21,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 22:11:21,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 22:11:21,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 22:11:21,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 22:11:21,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 22:11:21,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 22:11:21,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-30 22:11:21,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-30 22:11:21,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-30 22:11:21,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-30 22:11:21,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-30 22:11:21,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-30 22:11:21,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-30 22:11:21,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-30 22:11:21,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-30 22:11:21,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-30 22:11:21,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-30 22:11:21,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-30 22:11:21,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-30 22:11:21,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-30 22:11:21,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 22:11:21,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 22:11:21,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 22:11:21,249 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 [2022-01-30 22:11:21,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:11:21,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:11:21,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:11:21,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:11:21,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:11:21,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:11:21,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:11:21,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:11:21,280 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:11:21,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:11:21,281 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:11:21,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:11:21,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:11:21,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:11:21,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:11:21,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:11:21,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:11:21,282 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:11:21,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:11:21,282 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:11:21,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:11:21,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:11:21,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:11:21,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:11:21,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:11:21,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:11:21,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:11:21,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:11:21,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:11:21,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:11:21,287 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:11:21,288 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:11:21,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:11:21,288 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:11:21,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:11:21,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:11:21,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:11:21,540 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:11:21,545 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:11:21,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum40.i [2022-01-30 22:11:21,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c34755f/5641f78d9b8743b09e0a2a9a4af6ecea/FLAGb05e64f7c [2022-01-30 22:11:22,024 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:11:22,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i [2022-01-30 22:11:22,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c34755f/5641f78d9b8743b09e0a2a9a4af6ecea/FLAGb05e64f7c [2022-01-30 22:11:22,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c34755f/5641f78d9b8743b09e0a2a9a4af6ecea [2022-01-30 22:11:22,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:11:22,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:11:22,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:11:22,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:11:22,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:11:22,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c24d353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22, skipping insertion in model container [2022-01-30 22:11:22,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:11:22,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:11:22,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i[1465,1478] [2022-01-30 22:11:22,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:11:22,223 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:11:22,240 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i[1465,1478] [2022-01-30 22:11:22,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:11:22,252 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:11:22,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22 WrapperNode [2022-01-30 22:11:22,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:11:22,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:11:22,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:11:22,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:11:22,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:11:22,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:11:22,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:11:22,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:11:22,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (1/1) ... [2022-01-30 22:11:22,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:11:22,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:22,322 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) [2022-01-30 22:11:22,328 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 [2022-01-30 22:11:22,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:11:22,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:11:22,354 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:11:22,355 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2022-01-30 22:11:22,355 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2022-01-30 22:11:22,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:11:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:11:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:11:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 22:11:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 22:11:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:11:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:11:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:11:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2022-01-30 22:11:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:11:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2022-01-30 22:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 22:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:11:22,413 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:11:22,415 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:11:22,558 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:11:22,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:11:22,564 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 22:11:22,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:11:22 BoogieIcfgContainer [2022-01-30 22:11:22,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:11:22,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:11:22,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:11:22,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:11:22,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:11:22" (1/3) ... [2022-01-30 22:11:22,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631d4e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:11:22, skipping insertion in model container [2022-01-30 22:11:22,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:22" (2/3) ... [2022-01-30 22:11:22,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631d4e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:11:22, skipping insertion in model container [2022-01-30 22:11:22,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:11:22" (3/3) ... [2022-01-30 22:11:22,580 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2022-01-30 22:11:22,584 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:11:22,585 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:11:22,650 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:11:22,661 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:11:22,662 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:11:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 22:11:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-30 22:11:22,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:22,701 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:22,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash -310144342, now seen corresponding path program 1 times [2022-01-30 22:11:22,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:22,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017994649] [2022-01-30 22:11:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:22,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:22,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:11:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:22,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-30 22:11:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:22,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-30 22:11:22,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017994649] [2022-01-30 22:11:22,894 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-01-30 22:11:22,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106109514] [2022-01-30 22:11:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:22,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:22,897 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) [2022-01-30 22:11:22,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:11:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:23,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-30 22:11:23,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:11:23,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:23,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106109514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:23,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:23,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-30 22:11:23,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375938465] [2022-01-30 22:11:23,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:23,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-30 22:11:23,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-30 22:11:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:11:23,184 INFO L87 Difference]: Start difference. First operand has 37 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:23,206 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2022-01-30 22:11:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-30 22:11:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-01-30 22:11:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:23,214 INFO L225 Difference]: With dead ends: 64 [2022-01-30 22:11:23,214 INFO L226 Difference]: Without dead ends: 32 [2022-01-30 22:11:23,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:11:23,222 INFO L933 BasicCegarLoop]: 43 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, 43 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 [2022-01-30 22:11:23,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-30 22:11:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-30 22:11:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-30 22:11:23,259 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2022-01-30 22:11:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:23,259 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-30 22:11:23,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-30 22:11:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-30 22:11:23,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:23,263 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:23,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:23,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-30 22:11:23,488 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash -173787228, now seen corresponding path program 1 times [2022-01-30 22:11:23,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:23,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597719443] [2022-01-30 22:11:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:23,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:23,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:11:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:23,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-30 22:11:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-30 22:11:23,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:23,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597719443] [2022-01-30 22:11:23,580 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-01-30 22:11:23,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900862100] [2022-01-30 22:11:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:23,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:23,582 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) [2022-01-30 22:11:23,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:11:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:23,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:11:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:11:23,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:23,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900862100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:23,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:23,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:11:23,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492997008] [2022-01-30 22:11:23,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:23,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:11:23,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:11:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 22:11:23,771 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:23,791 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-01-30 22:11:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:11:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-01-30 22:11:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:23,794 INFO L225 Difference]: With dead ends: 56 [2022-01-30 22:11:23,794 INFO L226 Difference]: Without dead ends: 34 [2022-01-30 22:11:23,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 22:11:23,797 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:23,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-30 22:11:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-30 22:11:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-30 22:11:23,813 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2022-01-30 22:11:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:23,814 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-30 22:11:23,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-30 22:11:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-30 22:11:23,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:23,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:23,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-30 22:11:24,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-30 22:11:24,024 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash -886074366, now seen corresponding path program 1 times [2022-01-30 22:11:24,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:24,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218323896] [2022-01-30 22:11:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:24,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:24,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:24,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142266331] [2022-01-30 22:11:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:24,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:24,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:24,073 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) [2022-01-30 22:11:24,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:11:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:11:24,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-30 22:11:24,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:24,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:24,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218323896] [2022-01-30 22:11:24,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142266331] [2022-01-30 22:11:24,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142266331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:24,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:24,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:11:24,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714180711] [2022-01-30 22:11:24,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:24,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:11:24,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:24,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:11:24,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:24,240 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:24,259 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-01-30 22:11:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:11:24,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-01-30 22:11:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:24,262 INFO L225 Difference]: With dead ends: 54 [2022-01-30 22:11:24,262 INFO L226 Difference]: Without dead ends: 36 [2022-01-30 22:11:24,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:24,265 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:24,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-30 22:11:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-30 22:11:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-30 22:11:24,281 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2022-01-30 22:11:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:24,281 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-30 22:11:24,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-30 22:11:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 22:11:24,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:24,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:24,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:24,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:24,492 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash 527335525, now seen corresponding path program 1 times [2022-01-30 22:11:24,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:24,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150829429] [2022-01-30 22:11:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:24,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:24,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:24,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516800895] [2022-01-30 22:11:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:24,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:24,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:24,510 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) [2022-01-30 22:11:24,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:11:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:11:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-30 22:11:24,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:24,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:24,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150829429] [2022-01-30 22:11:24,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:24,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516800895] [2022-01-30 22:11:24,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516800895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:24,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:24,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:11:24,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024110711] [2022-01-30 22:11:24,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:24,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:11:24,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:11:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:24,649 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:24,658 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-01-30 22:11:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:11:24,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2022-01-30 22:11:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:24,659 INFO L225 Difference]: With dead ends: 52 [2022-01-30 22:11:24,659 INFO L226 Difference]: Without dead ends: 37 [2022-01-30 22:11:24,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:24,660 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:24,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-30 22:11:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-30 22:11:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-01-30 22:11:24,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2022-01-30 22:11:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:24,666 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-01-30 22:11:24,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-01-30 22:11:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-30 22:11:24,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:24,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:24,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:24,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:24,887 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1044403897, now seen corresponding path program 1 times [2022-01-30 22:11:24,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:24,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054842671] [2022-01-30 22:11:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:24,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:24,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:24,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887892174] [2022-01-30 22:11:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:24,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:24,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:24,904 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) [2022-01-30 22:11:24,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:11:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:11:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-30 22:11:25,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:25,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054842671] [2022-01-30 22:11:25,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887892174] [2022-01-30 22:11:25,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887892174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:25,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:25,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:11:25,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166982110] [2022-01-30 22:11:25,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:25,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:11:25,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:25,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:11:25,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:25,049 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:25,059 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2022-01-30 22:11:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:11:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-01-30 22:11:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:25,061 INFO L225 Difference]: With dead ends: 63 [2022-01-30 22:11:25,061 INFO L226 Difference]: Without dead ends: 42 [2022-01-30 22:11:25,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:25,062 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:25,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-30 22:11:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-01-30 22:11:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-01-30 22:11:25,068 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 50 [2022-01-30 22:11:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:25,069 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-01-30 22:11:25,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-01-30 22:11:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-30 22:11:25,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:25,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:25,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:25,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:25,292 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1413282844, now seen corresponding path program 1 times [2022-01-30 22:11:25,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:25,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417020138] [2022-01-30 22:11:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:25,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:25,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:11:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:25,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-30 22:11:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:25,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 22:11:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:25,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-30 22:11:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:25,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 22:11:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:11:25,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:25,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417020138] [2022-01-30 22:11:25,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417020138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:11:25,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565486102] [2022-01-30 22:11:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:25,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:25,445 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) [2022-01-30 22:11:25,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:11:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:11:25,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:11:25,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:11:25,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565486102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:25,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:11:25,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-01-30 22:11:25,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943046190] [2022-01-30 22:11:25,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:25,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-30 22:11:25,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:25,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-30 22:11:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-30 22:11:25,790 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:26,012 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-01-30 22:11:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-30 22:11:26,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-01-30 22:11:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:26,014 INFO L225 Difference]: With dead ends: 79 [2022-01-30 22:11:26,014 INFO L226 Difference]: Without dead ends: 50 [2022-01-30 22:11:26,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-30 22:11:26,015 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:26,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-30 22:11:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-30 22:11:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-30 22:11:26,021 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 50 [2022-01-30 22:11:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:26,021 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-30 22:11:26,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-30 22:11:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-30 22:11:26,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:26,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:26,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:26,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:26,244 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1142374631, now seen corresponding path program 2 times [2022-01-30 22:11:26,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:26,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757696449] [2022-01-30 22:11:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:26,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:26,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:11:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:26,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-30 22:11:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:26,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-30 22:11:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:26,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:11:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:26,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-30 22:11:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-30 22:11:26,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757696449] [2022-01-30 22:11:26,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757696449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:11:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578694030] [2022-01-30 22:11:26,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:11:26,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:26,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:26,351 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) [2022-01-30 22:11:26,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:11:26,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:11:26,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:26,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 22:11:26,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-30 22:11:26,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-30 22:11:26,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578694030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:26,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:11:26,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-01-30 22:11:26,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81972772] [2022-01-30 22:11:26,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:26,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:11:26,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:11:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:11:26,734 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-30 22:11:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:27,036 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2022-01-30 22:11:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-30 22:11:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2022-01-30 22:11:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:27,038 INFO L225 Difference]: With dead ends: 96 [2022-01-30 22:11:27,038 INFO L226 Difference]: Without dead ends: 64 [2022-01-30 22:11:27,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2022-01-30 22:11:27,039 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:27,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 37 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:11:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-30 22:11:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-01-30 22:11:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-01-30 22:11:27,046 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 65 [2022-01-30 22:11:27,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:27,046 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-01-30 22:11:27,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-30 22:11:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-01-30 22:11:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-30 22:11:27,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:27,048 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:27,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:27,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:27,265 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:27,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1692207533, now seen corresponding path program 1 times [2022-01-30 22:11:27,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:27,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934053241] [2022-01-30 22:11:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:27,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:27,285 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:27,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227503422] [2022-01-30 22:11:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:27,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:27,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:27,287 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) [2022-01-30 22:11:27,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:11:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:11:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-30 22:11:27,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-30 22:11:27,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:27,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934053241] [2022-01-30 22:11:27,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:27,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227503422] [2022-01-30 22:11:27,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227503422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:27,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:27,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-30 22:11:27,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295359486] [2022-01-30 22:11:27,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:27,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:11:27,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:27,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:11:27,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:11:27,890 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:27,948 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2022-01-30 22:11:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:11:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2022-01-30 22:11:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:27,949 INFO L225 Difference]: With dead ends: 113 [2022-01-30 22:11:27,949 INFO L226 Difference]: Without dead ends: 83 [2022-01-30 22:11:27,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:11:27,951 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:27,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 104 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-30 22:11:27,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-30 22:11:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-01-30 22:11:27,958 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 86 [2022-01-30 22:11:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:27,958 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-01-30 22:11:27,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-01-30 22:11:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-30 22:11:27,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:27,960 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:27,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:28,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-30 22:11:28,184 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1742298603, now seen corresponding path program 2 times [2022-01-30 22:11:28,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:28,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464027862] [2022-01-30 22:11:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:28,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:28,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:28,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608928698] [2022-01-30 22:11:28,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:11:28,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:28,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:28,216 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) [2022-01-30 22:11:28,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:11:28,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:11:28,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 22:11:28,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-30 22:11:28,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-30 22:11:29,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:29,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464027862] [2022-01-30 22:11:29,341 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:29,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608928698] [2022-01-30 22:11:29,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608928698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:29,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:29,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2022-01-30 22:11:29,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869344577] [2022-01-30 22:11:29,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:29,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-30 22:11:29,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:29,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-30 22:11:29,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-01-30 22:11:29,346 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:29,450 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2022-01-30 22:11:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-30 22:11:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2022-01-30 22:11:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:29,452 INFO L225 Difference]: With dead ends: 149 [2022-01-30 22:11:29,452 INFO L226 Difference]: Without dead ends: 119 [2022-01-30 22:11:29,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-01-30 22:11:29,454 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:29,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 172 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-30 22:11:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-01-30 22:11:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2022-01-30 22:11:29,463 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 110 [2022-01-30 22:11:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:29,463 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2022-01-30 22:11:29,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2022-01-30 22:11:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-30 22:11:29,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:29,465 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:29,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:29,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:29,691 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1310904911, now seen corresponding path program 3 times [2022-01-30 22:11:29,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804408362] [2022-01-30 22:11:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:29,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:29,755 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:29,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36388774] [2022-01-30 22:11:29,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:11:29,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:29,760 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) [2022-01-30 22:11:29,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:11:29,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 22:11:29,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:29,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:11:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 1674 trivial. 0 not checked. [2022-01-30 22:11:30,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-01-30 22:11:30,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804408362] [2022-01-30 22:11:30,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36388774] [2022-01-30 22:11:30,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36388774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:30,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:30,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-30 22:11:30,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202958399] [2022-01-30 22:11:30,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:30,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 22:11:30,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 22:11:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:11:30,209 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:30,231 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2022-01-30 22:11:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 22:11:30,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 146 [2022-01-30 22:11:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:30,234 INFO L225 Difference]: With dead ends: 145 [2022-01-30 22:11:30,234 INFO L226 Difference]: Without dead ends: 125 [2022-01-30 22:11:30,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:11:30,235 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:30,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 104 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-30 22:11:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-01-30 22:11:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2022-01-30 22:11:30,255 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 146 [2022-01-30 22:11:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:30,255 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2022-01-30 22:11:30,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2022-01-30 22:11:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-30 22:11:30,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:30,257 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:30,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:30,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 22:11:30,458 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1789820405, now seen corresponding path program 4 times [2022-01-30 22:11:30,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:30,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567004292] [2022-01-30 22:11:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:30,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:30,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:30,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484553450] [2022-01-30 22:11:30,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:11:30,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:30,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:30,495 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) [2022-01-30 22:11:30,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 22:11:30,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:11:30,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:11:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2022-01-30 22:11:30,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2022-01-30 22:11:30,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567004292] [2022-01-30 22:11:30,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484553450] [2022-01-30 22:11:30,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484553450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:30,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:30,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 22:11:30,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149451542] [2022-01-30 22:11:30,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:30,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:11:30,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:30,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:11:30,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:11:30,974 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-30 22:11:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:31,008 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-01-30 22:11:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-30 22:11:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 152 [2022-01-30 22:11:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:31,009 INFO L225 Difference]: With dead ends: 169 [2022-01-30 22:11:31,009 INFO L226 Difference]: Without dead ends: 137 [2022-01-30 22:11:31,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:11:31,011 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:31,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-30 22:11:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-01-30 22:11:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2022-01-30 22:11:31,022 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 152 [2022-01-30 22:11:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:31,022 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2022-01-30 22:11:31,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-30 22:11:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2022-01-30 22:11:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-30 22:11:31,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:31,024 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 21, 21, 18, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:31,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:31,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-30 22:11:31,241 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:31,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2076065589, now seen corresponding path program 5 times [2022-01-30 22:11:31,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:31,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925640584] [2022-01-30 22:11:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:31,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:31,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:31,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661173750] [2022-01-30 22:11:31,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:11:31,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:31,291 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) [2022-01-30 22:11:31,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 22:11:32,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-01-30 22:11:32,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-30 22:11:32,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 363 proven. 7 refuted. 0 times theorem prover too weak. 1954 trivial. 0 not checked. [2022-01-30 22:11:32,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 37 proven. 131 refuted. 0 times theorem prover too weak. 2156 trivial. 0 not checked. [2022-01-30 22:11:32,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:32,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925640584] [2022-01-30 22:11:32,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:32,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661173750] [2022-01-30 22:11:32,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661173750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:32,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:32,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-30 22:11:32,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455330964] [2022-01-30 22:11:32,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:32,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-30 22:11:32,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-30 22:11:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-01-30 22:11:32,589 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:32,637 INFO L93 Difference]: Finished difference Result 199 states and 224 transitions. [2022-01-30 22:11:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-30 22:11:32,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 188 [2022-01-30 22:11:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:32,640 INFO L225 Difference]: With dead ends: 199 [2022-01-30 22:11:32,640 INFO L226 Difference]: Without dead ends: 155 [2022-01-30 22:11:32,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-01-30 22:11:32,641 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:32,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-30 22:11:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-01-30 22:11:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 145 states have (on average 1.0758620689655172) internal successors, (156), 145 states have internal predecessors, (156), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:32,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2022-01-30 22:11:32,649 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 188 [2022-01-30 22:11:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:32,650 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2022-01-30 22:11:32,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2022-01-30 22:11:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-30 22:11:32,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:32,653 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 21, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:32,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:32,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 22:11:32,867 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1580762155, now seen corresponding path program 6 times [2022-01-30 22:11:32,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:32,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919687017] [2022-01-30 22:11:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:32,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:32,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:32,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767413567] [2022-01-30 22:11:32,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:11:32,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:32,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:32,925 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) [2022-01-30 22:11:32,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 22:11:33,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-30 22:11:33,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:33,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 22:11:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 1076 proven. 16 refuted. 0 times theorem prover too weak. 2879 trivial. 0 not checked. [2022-01-30 22:11:33,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3955 trivial. 0 not checked. [2022-01-30 22:11:33,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919687017] [2022-01-30 22:11:33,780 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767413567] [2022-01-30 22:11:33,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767413567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:33,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:33,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-30 22:11:33,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654047556] [2022-01-30 22:11:33,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:33,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-30 22:11:33,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:33,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-30 22:11:33,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:11:33,782 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:33,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:33,817 INFO L93 Difference]: Finished difference Result 217 states and 243 transitions. [2022-01-30 22:11:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-30 22:11:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 242 [2022-01-30 22:11:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:33,820 INFO L225 Difference]: With dead ends: 217 [2022-01-30 22:11:33,820 INFO L226 Difference]: Without dead ends: 167 [2022-01-30 22:11:33,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:11:33,821 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:33,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 104 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-30 22:11:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-01-30 22:11:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2022-01-30 22:11:33,831 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 242 [2022-01-30 22:11:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:33,831 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2022-01-30 22:11:33,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2022-01-30 22:11:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-30 22:11:33,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:33,834 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 21, 18, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:33,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:34,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 22:11:34,051 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1450964831, now seen corresponding path program 7 times [2022-01-30 22:11:34,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948138102] [2022-01-30 22:11:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:34,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:34,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:34,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443512614] [2022-01-30 22:11:34,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:11:34,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:34,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:34,105 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) [2022-01-30 22:11:34,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-30 22:11:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 22:11:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 669 proven. 57 refuted. 0 times theorem prover too weak. 3329 trivial. 0 not checked. [2022-01-30 22:11:34,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 133 proven. 1131 refuted. 0 times theorem prover too weak. 2791 trivial. 0 not checked. [2022-01-30 22:11:34,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948138102] [2022-01-30 22:11:34,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443512614] [2022-01-30 22:11:34,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443512614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:34,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:34,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-30 22:11:34,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292954294] [2022-01-30 22:11:34,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:34,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:11:34,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:34,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:11:34,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:11:34,959 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:35,012 INFO L93 Difference]: Finished difference Result 265 states and 298 transitions. [2022-01-30 22:11:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-30 22:11:35,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 254 [2022-01-30 22:11:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:35,014 INFO L225 Difference]: With dead ends: 265 [2022-01-30 22:11:35,014 INFO L226 Difference]: Without dead ends: 191 [2022-01-30 22:11:35,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:11:35,015 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:35,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 195 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-30 22:11:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-30 22:11:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 181 states have (on average 1.0607734806629834) internal successors, (192), 181 states have internal predecessors, (192), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 203 transitions. [2022-01-30 22:11:35,023 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 203 transitions. Word has length 254 [2022-01-30 22:11:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:35,023 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 203 transitions. [2022-01-30 22:11:35,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 203 transitions. [2022-01-30 22:11:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-30 22:11:35,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:35,027 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 42, 40, 40, 21, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:35,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:35,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:35,253 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1962403617, now seen corresponding path program 8 times [2022-01-30 22:11:35,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:35,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938651305] [2022-01-30 22:11:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:35,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:35,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203882703] [2022-01-30 22:11:35,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:11:35,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:35,292 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:35,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-30 22:11:35,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:11:35,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 22:11:35,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7763 backedges. 2173 proven. 301 refuted. 0 times theorem prover too weak. 5289 trivial. 0 not checked. [2022-01-30 22:11:36,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7763 backedges. 293 proven. 3039 refuted. 0 times theorem prover too weak. 4431 trivial. 0 not checked. [2022-01-30 22:11:36,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:36,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938651305] [2022-01-30 22:11:36,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:36,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203882703] [2022-01-30 22:11:36,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203882703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:36,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:36,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2022-01-30 22:11:36,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634205124] [2022-01-30 22:11:36,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:36,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-30 22:11:36,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-30 22:11:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-01-30 22:11:36,454 INFO L87 Difference]: Start difference. First operand 191 states and 203 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:36,531 INFO L93 Difference]: Finished difference Result 310 states and 342 transitions. [2022-01-30 22:11:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-30 22:11:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 326 [2022-01-30 22:11:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:36,533 INFO L225 Difference]: With dead ends: 310 [2022-01-30 22:11:36,533 INFO L226 Difference]: Without dead ends: 212 [2022-01-30 22:11:36,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-01-30 22:11:36,536 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:36,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-30 22:11:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-01-30 22:11:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.0544554455445545) internal successors, (213), 202 states have internal predecessors, (213), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 224 transitions. [2022-01-30 22:11:36,546 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 224 transitions. Word has length 326 [2022-01-30 22:11:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:36,546 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 224 transitions. [2022-01-30 22:11:36,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 224 transitions. [2022-01-30 22:11:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-01-30 22:11:36,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:36,548 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 63, 40, 40, 21, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:36,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:36,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-30 22:11:36,755 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash -978050114, now seen corresponding path program 9 times [2022-01-30 22:11:36,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:36,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382947349] [2022-01-30 22:11:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:36,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:36,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:36,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750382106] [2022-01-30 22:11:36,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:11:36,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:36,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:36,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:36,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-30 22:11:37,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-30 22:11:37,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:11:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12425 backedges. 4826 proven. 100 refuted. 0 times theorem prover too weak. 7499 trivial. 0 not checked. [2022-01-30 22:11:38,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12425 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12325 trivial. 0 not checked. [2022-01-30 22:11:38,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382947349] [2022-01-30 22:11:38,493 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750382106] [2022-01-30 22:11:38,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750382106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:38,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:38,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-30 22:11:38,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929791458] [2022-01-30 22:11:38,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:38,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:11:38,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:38,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:11:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:11:38,495 INFO L87 Difference]: Start difference. First operand 212 states and 224 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:38,555 INFO L93 Difference]: Finished difference Result 331 states and 363 transitions. [2022-01-30 22:11:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:11:38,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 389 [2022-01-30 22:11:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:38,557 INFO L225 Difference]: With dead ends: 331 [2022-01-30 22:11:38,557 INFO L226 Difference]: Without dead ends: 236 [2022-01-30 22:11:38,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 755 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:11:38,558 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:38,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 104 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-30 22:11:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-01-30 22:11:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 226 states have (on average 1.0486725663716814) internal successors, (237), 226 states have internal predecessors, (237), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 248 transitions. [2022-01-30 22:11:38,568 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 248 transitions. Word has length 389 [2022-01-30 22:11:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:38,568 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 248 transitions. [2022-01-30 22:11:38,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 248 transitions. [2022-01-30 22:11:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-01-30 22:11:38,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:38,571 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 63, 40, 40, 22, 22, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:38,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:38,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-30 22:11:38,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:38,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1385330982, now seen corresponding path program 10 times [2022-01-30 22:11:38,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:38,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657751620] [2022-01-30 22:11:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:38,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:38,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:38,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918571576] [2022-01-30 22:11:38,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:11:38,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:38,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:38,821 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:38,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-30 22:11:39,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:11:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:39,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 22:11:39,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12809 backedges. 7235 proven. 1162 refuted. 0 times theorem prover too weak. 4412 trivial. 0 not checked. [2022-01-30 22:11:39,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12809 backedges. 2412 proven. 3574 refuted. 0 times theorem prover too weak. 6823 trivial. 0 not checked. [2022-01-30 22:11:40,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657751620] [2022-01-30 22:11:40,660 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918571576] [2022-01-30 22:11:40,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918571576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:40,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:40,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 42 [2022-01-30 22:11:40,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609623380] [2022-01-30 22:11:40,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:40,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-30 22:11:40,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-30 22:11:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-01-30 22:11:40,664 INFO L87 Difference]: Start difference. First operand 236 states and 248 transitions. Second operand has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:40,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:40,819 INFO L93 Difference]: Finished difference Result 415 states and 464 transitions. [2022-01-30 22:11:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-30 22:11:40,820 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 413 [2022-01-30 22:11:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:40,822 INFO L225 Difference]: With dead ends: 415 [2022-01-30 22:11:40,822 INFO L226 Difference]: Without dead ends: 272 [2022-01-30 22:11:40,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-01-30 22:11:40,824 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 140 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:40,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 194 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-30 22:11:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-01-30 22:11:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 262 states have (on average 1.0877862595419847) internal successors, (285), 262 states have internal predecessors, (285), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 296 transitions. [2022-01-30 22:11:40,833 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 296 transitions. Word has length 413 [2022-01-30 22:11:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:40,834 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 296 transitions. [2022-01-30 22:11:40,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 296 transitions. [2022-01-30 22:11:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-01-30 22:11:40,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:40,837 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 63, 57, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:40,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:41,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-30 22:11:41,048 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1532093978, now seen corresponding path program 11 times [2022-01-30 22:11:41,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:41,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350437431] [2022-01-30 22:11:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:41,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:41,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:41,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74189777] [2022-01-30 22:11:41,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:11:41,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:41,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:41,102 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:41,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process