/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 11:51:35,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 11:51:35,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 11:51:35,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 11:51:35,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 11:51:35,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 11:51:35,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 11:51:35,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 11:51:35,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 11:51:35,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 11:51:35,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 11:51:35,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 11:51:35,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 11:51:35,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 11:51:35,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 11:51:35,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 11:51:35,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 11:51:35,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 11:51:35,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 11:51:35,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 11:51:35,249 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 11:51:35,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 11:51:35,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 11:51:35,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 11:51:35,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 11:51:35,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 11:51:35,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 11:51:35,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 11:51:35,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 11:51:35,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 11:51:35,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 11:51:35,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 11:51:35,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 11:51:35,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 11:51:35,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 11:51:35,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 11:51:35,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 11:51:35,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 11:51:35,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 11:51:35,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 11:51:35,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 11:51:35,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 11:51:35,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 11:51:35,286 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 11:51:35,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 11:51:35,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 11:51:35,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 11:51:35,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 11:51:35,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 11:51:35,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 11:51:35,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 11:51:35,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 11:51:35,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 11:51:35,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 11:51:35,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 11:51:35,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 11:51:35,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 11:51:35,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 11:51:35,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:51:35,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 11:51:35,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 11:51:35,290 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 11:51:35,290 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 11:51:35,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 11:51:35,290 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 11:51:35,290 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 11:51:35,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 11:51:35,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 11:51:35,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 11:51:35,531 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 11:51:35,532 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 11:51:35,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound10.c [2022-03-19 11:51:35,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6bbab87/d96e3e6bc8e440019845d527205e890a/FLAG2e930d791 [2022-03-19 11:51:35,944 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 11:51:35,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound10.c [2022-03-19 11:51:35,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6bbab87/d96e3e6bc8e440019845d527205e890a/FLAG2e930d791 [2022-03-19 11:51:35,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd6bbab87/d96e3e6bc8e440019845d527205e890a [2022-03-19 11:51:35,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 11:51:35,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 11:51:35,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 11:51:35,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 11:51:35,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 11:51:35,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:51:35" (1/1) ... [2022-03-19 11:51:35,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724c4a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:35, skipping insertion in model container [2022-03-19 11:51:35,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:51:35" (1/1) ... [2022-03-19 11:51:35,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 11:51:35,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 11:51:36,122 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound10.c[537,550] [2022-03-19 11:51:36,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:51:36,143 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 11:51:36,153 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound10.c[537,550] [2022-03-19 11:51:36,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:51:36,167 INFO L208 MainTranslator]: Completed translation [2022-03-19 11:51:36,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36 WrapperNode [2022-03-19 11:51:36,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 11:51:36,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 11:51:36,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 11:51:36,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 11:51:36,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (1/1) ... [2022-03-19 11:51:36,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (1/1) ... [2022-03-19 11:51:36,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (1/1) ... [2022-03-19 11:51:36,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (1/1) ... [2022-03-19 11:51:36,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (1/1) ... [2022-03-19 11:51:36,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (1/1) ... [2022-03-19 11:51:36,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (1/1) ... [2022-03-19 11:51:36,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 11:51:36,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 11:51:36,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 11:51:36,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 11:51:36,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (1/1) ... [2022-03-19 11:51:36,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:51:36,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:51:36,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 11:51:36,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 11:51:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 11:51:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 11:51:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 11:51:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 11:51:36,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 11:51:36,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 11:51:36,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 11:51:36,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 11:51:36,283 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 11:51:36,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 11:51:36,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 11:51:36,284 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 11:51:36,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 11:51:36,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 11:51:36,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 11:51:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 11:51:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 11:51:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 11:51:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 11:51:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 11:51:36,334 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 11:51:36,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 11:51:36,456 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 11:51:36,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 11:51:36,461 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 11:51:36,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:51:36 BoogieIcfgContainer [2022-03-19 11:51:36,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 11:51:36,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 11:51:36,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 11:51:36,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 11:51:36,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:51:35" (1/3) ... [2022-03-19 11:51:36,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efe45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:51:36, skipping insertion in model container [2022-03-19 11:51:36,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:51:36" (2/3) ... [2022-03-19 11:51:36,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efe45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:51:36, skipping insertion in model container [2022-03-19 11:51:36,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:51:36" (3/3) ... [2022-03-19 11:51:36,491 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound10.c [2022-03-19 11:51:36,495 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 11:51:36,495 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 11:51:36,530 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 11:51:36,536 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 11:51:36,536 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 11:51:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:51:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 11:51:36,555 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:51:36,555 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:51:36,556 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:51:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:51:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 1 times [2022-03-19 11:51:36,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:51:36,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1711576479] [2022-03-19 11:51:36,583 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:51:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 2 times [2022-03-19 11:51:36,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:51:36,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853708669] [2022-03-19 11:51:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:51:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:51:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:51:36,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:51:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:51:36,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:51:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:51:36,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:51:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:51:36,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:51:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:51:36,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 11:51:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:51:36,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 11:51:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:51:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 11:51:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:51:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 11:51:36,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:51:36,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853708669] [2022-03-19 11:51:36,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853708669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:51:36,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:51:36,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:51:36,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:51:36,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1711576479] [2022-03-19 11:51:36,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1711576479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:51:36,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:51:36,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:51:36,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386839469] [2022-03-19 11:51:36,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:51:36,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 11:51:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:51:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 11:51:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:51:36,874 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:51:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:51:36,959 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2022-03-19 11:51:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 11:51:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-19 11:51:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:51:36,967 INFO L225 Difference]: With dead ends: 61 [2022-03-19 11:51:36,967 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 11:51:36,970 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:51:36,972 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:51:36,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:51:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 11:51:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 11:51:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 11:51:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-19 11:51:37,006 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43 [2022-03-19 11:51:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:51:37,007 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-19 11:51:37,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:51:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-19 11:51:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 11:51:37,009 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:51:37,009 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:51:37,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 11:51:37,010 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:51:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:51:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 1 times [2022-03-19 11:51:37,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:51:37,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068211402] [2022-03-19 11:51:37,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:51:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 2 times [2022-03-19 11:51:37,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:51:37,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371894074] [2022-03-19 11:51:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:51:37,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:51:37,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:51:37,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686816574] [2022-03-19 11:51:37,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:51:37,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:51:37,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:51:37,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:51:37,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 11:51:37,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 11:51:37,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:51:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 11:51:37,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:51:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 11:51:37,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:51:37,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:51:37,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371894074] [2022-03-19 11:51:37,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:51:37,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686816574] [2022-03-19 11:51:37,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686816574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:51:37,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:51:37,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:51:37,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:51:37,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068211402] [2022-03-19 11:51:37,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068211402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:51:37,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:51:37,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:51:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589238282] [2022-03-19 11:51:37,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:51:37,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:51:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:51:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:51:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:51:37,439 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 11:51:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:51:37,501 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-03-19 11:51:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:51:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-03-19 11:51:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:51:37,504 INFO L225 Difference]: With dead ends: 40 [2022-03-19 11:51:37,504 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 11:51:37,505 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:51:37,506 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:51:37,506 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:51:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 11:51:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-19 11:51:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 11:51:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-19 11:51:37,517 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 43 [2022-03-19 11:51:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:51:37,518 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-19 11:51:37,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 11:51:37,518 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-19 11:51:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 11:51:37,520 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:51:37,520 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:51:37,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 11:51:37,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:51:37,727 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:51:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:51:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1555618915, now seen corresponding path program 1 times [2022-03-19 11:51:37,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:51:37,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543060614] [2022-03-19 11:51:37,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:51:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1555618915, now seen corresponding path program 2 times [2022-03-19 11:51:37,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:51:37,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696139782] [2022-03-19 11:51:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:51:37,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:51:37,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:51:37,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998764509] [2022-03-19 11:51:37,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:51:37,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:51:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:51:37,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:51:37,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process