/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/hard-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 09:02:26,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 09:02:26,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 09:02:26,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 09:02:26,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 09:02:26,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 09:02:26,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 09:02:26,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 09:02:26,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 09:02:26,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 09:02:26,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 09:02:26,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 09:02:26,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 09:02:26,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 09:02:26,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 09:02:26,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 09:02:26,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 09:02:26,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 09:02:26,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 09:02:26,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 09:02:26,320 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 09:02:26,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 09:02:26,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 09:02:26,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 09:02:26,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 09:02:26,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 09:02:26,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 09:02:26,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 09:02:26,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 09:02:26,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 09:02:26,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 09:02:26,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 09:02:26,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 09:02:26,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 09:02:26,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 09:02:26,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 09:02:26,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 09:02:26,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 09:02:26,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 09:02:26,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 09:02:26,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 09:02:26,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 09:02:26,334 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 09:02:26,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 09:02:26,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 09:02:26,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 09:02:26,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 09:02:26,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 09:02:26,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 09:02:26,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 09:02:26,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 09:02:26,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 09:02:26,351 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 09:02:26,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 09:02:26,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 09:02:26,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 09:02:26,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 09:02:26,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 09:02:26,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:02:26,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 09:02:26,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 09:02:26,352 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 09:02:26,352 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 09:02:26,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 09:02:26,353 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 09:02:26,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 09:02:26,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 09:02:26,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 09:02:26,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 09:02:26,608 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 09:02:26,609 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 09:02:26,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-u.c [2022-03-19 09:02:26,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96730d05/12b51ac064b6458b9da7edb4107272e8/FLAGf1c3c71ad [2022-03-19 09:02:27,021 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 09:02:27,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-u.c [2022-03-19 09:02:27,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96730d05/12b51ac064b6458b9da7edb4107272e8/FLAGf1c3c71ad [2022-03-19 09:02:27,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96730d05/12b51ac064b6458b9da7edb4107272e8 [2022-03-19 09:02:27,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 09:02:27,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 09:02:27,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 09:02:27,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 09:02:27,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 09:02:27,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33fb7c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27, skipping insertion in model container [2022-03-19 09:02:27,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 09:02:27,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 09:02:27,202 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/hard-u.c[537,550] [2022-03-19 09:02:27,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:02:27,226 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 09:02:27,234 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/hard-u.c[537,550] [2022-03-19 09:02:27,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:02:27,247 INFO L208 MainTranslator]: Completed translation [2022-03-19 09:02:27,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27 WrapperNode [2022-03-19 09:02:27,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 09:02:27,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 09:02:27,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 09:02:27,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 09:02:27,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 09:02:27,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 09:02:27,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 09:02:27,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 09:02:27,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (1/1) ... [2022-03-19 09:02:27,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:02:27,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:02:27,317 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 09:02:27,332 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 09:02:27,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 09:02:27,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 09:02:27,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 09:02:27,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 09:02:27,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 09:02:27,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 09:02:27,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 09:02:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 09:02:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 09:02:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 09:02:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 09:02:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 09:02:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 09:02:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 09:02:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 09:02:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 09:02:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 09:02:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 09:02:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 09:02:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 09:02:27,402 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 09:02:27,403 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 09:02:27,495 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 09:02:27,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 09:02:27,500 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 09:02:27,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:02:27 BoogieIcfgContainer [2022-03-19 09:02:27,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 09:02:27,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 09:02:27,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 09:02:27,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 09:02:27,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:02:27" (1/3) ... [2022-03-19 09:02:27,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb9eecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:02:27, skipping insertion in model container [2022-03-19 09:02:27,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:02:27" (2/3) ... [2022-03-19 09:02:27,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb9eecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:02:27, skipping insertion in model container [2022-03-19 09:02:27,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:02:27" (3/3) ... [2022-03-19 09:02:27,508 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.c [2022-03-19 09:02:27,511 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 09:02:27,512 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 09:02:27,543 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 09:02:27,548 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 09:02:27,548 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 09:02:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 09:02:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 09:02:27,566 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:02:27,566 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:02:27,566 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:02:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:02:27,571 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-03-19 09:02:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:27,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994929460] [2022-03-19 09:02:27,585 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:02:27,585 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-03-19 09:02:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:02:27,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619348808] [2022-03-19 09:02:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:02:27,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:02:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:27,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 09:02:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:27,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 09:02:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:02:27,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:02:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619348808] [2022-03-19 09:02:27,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619348808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:27,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:27,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:02:27,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:02:27,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994929460] [2022-03-19 09:02:27,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994929460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:27,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:27,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:02:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291889035] [2022-03-19 09:02:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:02:27,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 09:02:27,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 09:02:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 09:02:27,823 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 09:02:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:02:27,892 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-03-19 09:02:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 09:02:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 09:02:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:02:27,903 INFO L225 Difference]: With dead ends: 61 [2022-03-19 09:02:27,904 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 09:02:27,906 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 09:02:27,909 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:02:27,910 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:02:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 09:02:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 09:02:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 09:02:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-19 09:02:27,949 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-19 09:02:27,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:02:27,950 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-19 09:02:27,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 09:02:27,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-19 09:02:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 09:02:27,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:02:27,951 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:02:27,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 09:02:27,952 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:02:27,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:02:27,953 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-03-19 09:02:27,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:27,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [625157481] [2022-03-19 09:02:27,959 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:02:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-03-19 09:02:27,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:02:27,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064160676] [2022-03-19 09:02:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:02:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:02:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:28,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 09:02:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:28,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 09:02:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:02:28,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:02:28,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064160676] [2022-03-19 09:02:28,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064160676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:28,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:28,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:02:28,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:02:28,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [625157481] [2022-03-19 09:02:28,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [625157481] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:28,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:28,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:02:28,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148284815] [2022-03-19 09:02:28,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:02:28,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 09:02:28,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 09:02:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:02:28,052 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 09:02:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:02:28,235 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-19 09:02:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 09:02:28,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 09:02:28,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:02:28,242 INFO L225 Difference]: With dead ends: 43 [2022-03-19 09:02:28,242 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 09:02:28,243 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 09:02:28,245 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:02:28,245 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:02:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 09:02:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-19 09:02:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 09:02:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-19 09:02:28,264 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-19 09:02:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:02:28,264 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-19 09:02:28,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 09:02:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-19 09:02:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 09:02:28,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:02:28,265 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:02:28,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 09:02:28,266 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:02:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:02:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-03-19 09:02:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:28,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382732599] [2022-03-19 09:02:28,273 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:02:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-03-19 09:02:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:02:28,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506943175] [2022-03-19 09:02:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:02:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:02:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 09:02:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:28,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 09:02:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:28,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 09:02:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:02:28,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:02:28,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506943175] [2022-03-19 09:02:28,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506943175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:28,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:28,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:02:28,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:02:28,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382732599] [2022-03-19 09:02:28,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382732599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:28,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:28,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:02:28,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997020937] [2022-03-19 09:02:28,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:02:28,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 09:02:28,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 09:02:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:02:28,375 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 09:02:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:02:28,526 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-19 09:02:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 09:02:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 09:02:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:02:28,529 INFO L225 Difference]: With dead ends: 47 [2022-03-19 09:02:28,530 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 09:02:28,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 09:02:28,535 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:02:28,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:02:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 09:02:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-19 09:02:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 09:02:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-19 09:02:28,557 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-19 09:02:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:02:28,557 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-19 09:02:28,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 09:02:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-19 09:02:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 09:02:28,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:02:28,558 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:02:28,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 09:02:28,559 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:02:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:02:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-03-19 09:02:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:28,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1608421673] [2022-03-19 09:02:28,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:02:28,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-03-19 09:02:28,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:02:28,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601348531] [2022-03-19 09:02:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:02:28,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:02:28,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:02:28,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020966887] [2022-03-19 09:02:28,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:02:28,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:02:28,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:02:28,587 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 09:02:28,593 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 09:02:28,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:02:28,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:02:28,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 09:02:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:02:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 09:02:28,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:02:28,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:02:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601348531] [2022-03-19 09:02:28,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:02:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020966887] [2022-03-19 09:02:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020966887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:28,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:28,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:02:28,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:02:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1608421673] [2022-03-19 09:02:28,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1608421673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:28,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:28,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:02:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600724841] [2022-03-19 09:02:28,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:02:28,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 09:02:28,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 09:02:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 09:02:28,819 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 09:02:30,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 09:02:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:02:31,088 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-03-19 09:02:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 09:02:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-19 09:02:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:02:31,090 INFO L225 Difference]: With dead ends: 55 [2022-03-19 09:02:31,090 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 09:02:31,091 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 09:02:31,092 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:02:31,092 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 09:02:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 09:02:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 09:02:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:02:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-03-19 09:02:31,120 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 27 [2022-03-19 09:02:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:02:31,120 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-03-19 09:02:31,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 09:02:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-03-19 09:02:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 09:02:31,122 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:02:31,122 INFO L500 BasicCegarLoop]: trace histogram [4, 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] [2022-03-19 09:02:31,163 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 09:02:31,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:02:31,344 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:02:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:02:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-03-19 09:02:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:31,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946166284] [2022-03-19 09:02:31,345 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:02:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-03-19 09:02:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:02:31,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380064116] [2022-03-19 09:02:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:02:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:02:31,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:02:31,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21673355] [2022-03-19 09:02:31,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:02:31,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:02:31,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:02:31,359 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 09:02:31,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 09:02:31,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:02:31,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:02:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 09:02:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:02:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 09:02:31,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:02:31,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:02:31,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380064116] [2022-03-19 09:02:31,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:02:31,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21673355] [2022-03-19 09:02:31,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21673355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:31,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:31,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:02:31,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:02:31,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946166284] [2022-03-19 09:02:31,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946166284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:31,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:31,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:02:31,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436568860] [2022-03-19 09:02:31,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:02:31,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 09:02:31,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 09:02:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:02:31,654 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 09:02:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:02:31,922 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-03-19 09:02:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 09:02:31,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 09:02:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:02:31,924 INFO L225 Difference]: With dead ends: 73 [2022-03-19 09:02:31,924 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 09:02:31,924 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 09:02:31,925 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:02:31,925 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 09:02:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 09:02:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-19 09:02:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 09:02:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-03-19 09:02:31,946 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 34 [2022-03-19 09:02:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:02:31,947 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-03-19 09:02:31,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 09:02:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-03-19 09:02:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 09:02:31,949 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:02:31,949 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:02:31,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 09:02:32,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:02:32,168 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:02:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:02:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-03-19 09:02:32,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:32,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89123549] [2022-03-19 09:02:32,381 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 09:02:32,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1588810485, now seen corresponding path program 1 times [2022-03-19 09:02:32,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:02:32,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318842291] [2022-03-19 09:02:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:02:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:02:32,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:02:32,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800758954] [2022-03-19 09:02:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:02:32,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:02:32,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:02:32,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:02:32,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 09:02:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:02:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 09:02:32,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:02:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 09:02:32,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:02:32,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:02:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318842291] [2022-03-19 09:02:32,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:02:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800758954] [2022-03-19 09:02:32,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800758954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:32,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:32,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:02:35,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:02:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89123549] [2022-03-19 09:02:35,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89123549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:02:35,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:02:35,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 09:02:35,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531218318] [2022-03-19 09:02:35,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:02:35,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 09:02:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:02:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 09:02:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=269, Unknown=1, NotChecked=0, Total=342 [2022-03-19 09:02:35,063 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 09:02:42,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:02:44,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:02:46,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:02:48,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:02:50,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 09:02:52,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 09:02:54,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 09:02:56,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 09:02:58,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 09:03:00,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:03:02,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 09:03:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:03:03,039 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2022-03-19 09:03:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 09:03:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.5625) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-03-19 09:03:03,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:03:03,041 INFO L225 Difference]: With dead ends: 87 [2022-03-19 09:03:03,042 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 09:03:03,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=119, Invalid=530, Unknown=1, NotChecked=0, Total=650 [2022-03-19 09:03:03,043 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 23 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:03:03,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 289 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 149 Invalid, 11 Unknown, 0 Unchecked, 23.0s Time] [2022-03-19 09:03:03,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 09:03:03,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-19 09:03:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:03:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-03-19 09:03:03,055 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 44 [2022-03-19 09:03:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:03:03,056 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-03-19 09:03:03,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.5625) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 09:03:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-03-19 09:03:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 09:03:03,057 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:03:03,057 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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 09:03:03,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 09:03:03,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:03:03,278 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:03:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:03:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1352613400, now seen corresponding path program 1 times [2022-03-19 09:03:03,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:03:03,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2140340211] [2022-03-19 09:03:03,279 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:03:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1352613400, now seen corresponding path program 2 times [2022-03-19 09:03:03,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:03:03,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452407080] [2022-03-19 09:03:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:03:03,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:03:03,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:03:03,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563233109] [2022-03-19 09:03:03,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:03:03,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:03:03,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:03:03,304 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) [2022-03-19 09:03:03,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process