/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 01:14:02,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 01:14:02,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 01:14:02,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 01:14:02,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 01:14:02,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 01:14:02,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 01:14:02,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 01:14:02,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 01:14:02,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 01:14:02,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 01:14:02,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 01:14:02,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 01:14:02,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 01:14:02,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 01:14:02,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 01:14:02,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 01:14:02,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 01:14:02,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 01:14:02,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 01:14:02,294 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 01:14:02,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 01:14:02,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 01:14:02,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 01:14:02,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 01:14:02,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 01:14:02,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 01:14:02,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 01:14:02,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 01:14:02,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 01:14:02,328 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 01:14:02,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 01:14:02,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 01:14:02,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 01:14:02,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 01:14:02,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 01:14:02,330 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 01:14:02,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 01:14:02,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 01:14:02,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 01:14:02,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 01:14:02,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 01:14:02,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 01:14:02,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 01:14:02,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 01:14:02,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 01:14:02,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 01:14:02,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 01:14:02,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 01:14:02,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:14:02,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 01:14:02,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 01:14:02,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 01:14:02,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 01:14:02,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 01:14:02,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 01:14:02,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 01:14:02,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 01:14:02,335 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 01:14:02,335 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 01:14:02,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 01:14:02,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 01:14:02,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 01:14:02,557 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 01:14:02,558 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 01:14:02,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c [2022-03-19 01:14:02,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ff5d1713/9a0cc82dff0c4e6c9656987787a15f19/FLAG5d0609a7d [2022-03-19 01:14:03,028 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 01:14:03,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c [2022-03-19 01:14:03,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ff5d1713/9a0cc82dff0c4e6c9656987787a15f19/FLAG5d0609a7d [2022-03-19 01:14:03,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ff5d1713/9a0cc82dff0c4e6c9656987787a15f19 [2022-03-19 01:14:03,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 01:14:03,052 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 01:14:03,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 01:14:03,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 01:14:03,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 01:14:03,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0384d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03, skipping insertion in model container [2022-03-19 01:14:03,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 01:14:03,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 01:14:03,245 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/ps4-ll_valuebound10.c[458,471] [2022-03-19 01:14:03,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:14:03,264 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 01:14:03,274 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/ps4-ll_valuebound10.c[458,471] [2022-03-19 01:14:03,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:14:03,287 INFO L208 MainTranslator]: Completed translation [2022-03-19 01:14:03,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03 WrapperNode [2022-03-19 01:14:03,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 01:14:03,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 01:14:03,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 01:14:03,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 01:14:03,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 01:14:03,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 01:14:03,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 01:14:03,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 01:14:03,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:14:03,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:03,340 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 01:14:03,366 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 01:14:03,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 01:14:03,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 01:14:03,380 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 01:14:03,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 01:14:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 01:14:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 01:14:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 01:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 01:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 01:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 01:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 01:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 01:14:03,438 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 01:14:03,440 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 01:14:03,546 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 01:14:03,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 01:14:03,551 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 01:14:03,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:14:03 BoogieIcfgContainer [2022-03-19 01:14:03,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 01:14:03,553 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 01:14:03,553 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 01:14:03,554 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 01:14:03,556 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:14:03" (1/1) ... [2022-03-19 01:14:03,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:14:03 BasicIcfg [2022-03-19 01:14:03,575 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 01:14:03,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 01:14:03,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 01:14:03,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 01:14:03,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:14:03" (1/4) ... [2022-03-19 01:14:03,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee5ea25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:14:03, skipping insertion in model container [2022-03-19 01:14:03,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:03" (2/4) ... [2022-03-19 01:14:03,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee5ea25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:14:03, skipping insertion in model container [2022-03-19 01:14:03,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:14:03" (3/4) ... [2022-03-19 01:14:03,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee5ea25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:14:03, skipping insertion in model container [2022-03-19 01:14:03,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:14:03" (4/4) ... [2022-03-19 01:14:03,586 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.cqvasr [2022-03-19 01:14:03,590 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 01:14:03,590 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 01:14:03,649 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 01:14:03,656 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 01:14:03,657 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 01:14:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 01:14:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 01:14:03,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:03,681 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 01:14:03,682 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:03,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-03-19 01:14:03,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:03,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523865328] [2022-03-19 01:14:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:03,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:14:03,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:14:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:14:03,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 01:14:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:14:03,887 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 01:14:03,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523865328] [2022-03-19 01:14:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523865328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:14:03,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:14:03,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 01:14:03,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866387628] [2022-03-19 01:14:03,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:14:03,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 01:14:03,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:03,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 01:14:03,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 01:14:03,915 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 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 01:14:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:03,958 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-03-19 01:14:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 01:14:03,961 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 01:14:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:03,966 INFO L225 Difference]: With dead ends: 47 [2022-03-19 01:14:03,967 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 01:14:03,969 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 01:14:03,972 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:03,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:14:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 01:14:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 01:14:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 01:14:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-19 01:14:04,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-19 01:14:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:04,031 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-19 01:14:04,031 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 01:14:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-19 01:14:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 01:14:04,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:04,033 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 01:14:04,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 01:14:04,033 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-03-19 01:14:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:04,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749460349] [2022-03-19 01:14:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:04,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:04,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:04,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484265769] [2022-03-19 01:14:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:04,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:04,086 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 01:14:04,087 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 01:14:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:14:04,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 01:14:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:04,284 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 01:14:04,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 01:14:04,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749460349] [2022-03-19 01:14:04,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484265769] [2022-03-19 01:14:04,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484265769] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:14:04,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:14:04,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 01:14:04,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378517292] [2022-03-19 01:14:04,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:14:04,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 01:14:04,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 01:14:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:14:04,291 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 01:14:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:04,350 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-19 01:14:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 01:14:04,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 01:14:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:04,352 INFO L225 Difference]: With dead ends: 34 [2022-03-19 01:14:04,352 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 01:14:04,353 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 01:14:04,354 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:04,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:14:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 01:14:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 01:14:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:14:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-19 01:14:04,362 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-19 01:14:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:04,362 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-19 01:14:04,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 01:14:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-19 01:14:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 01:14:04,363 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:04,363 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:04,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:04,579 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 01:14:04,580 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-03-19 01:14:04,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:04,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463404288] [2022-03-19 01:14:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:04,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:04,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:04,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340577186] [2022-03-19 01:14:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:04,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:04,594 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 01:14:04,611 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 01:14:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:14:04,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 01:14:04,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 01:14:04,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 01:14:04,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463404288] [2022-03-19 01:14:04,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340577186] [2022-03-19 01:14:04,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340577186] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:04,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:04,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 01:14:04,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612388971] [2022-03-19 01:14:04,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:14:04,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 01:14:04,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:04,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 01:14:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 01:14:04,982 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 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 01:14:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:05,041 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-03-19 01:14:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 01:14:05,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 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 24 [2022-03-19 01:14:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:05,043 INFO L225 Difference]: With dead ends: 36 [2022-03-19 01:14:05,043 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 01:14:05,043 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 01:14:05,044 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:05,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:14:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 01:14:05,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 01:14:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 01:14:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-19 01:14:05,051 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-19 01:14:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:05,051 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-19 01:14:05,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 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 01:14:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-19 01:14:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 01:14:05,052 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:05,052 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:05,078 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 01:14:05,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 01:14:05,276 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-03-19 01:14:05,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:05,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593042740] [2022-03-19 01:14:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:05,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:05,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:05,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998221638] [2022-03-19 01:14:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:05,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:05,292 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 01:14:05,301 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 01:14:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:14:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 01:14:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 01:14:05,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:05,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:05,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593042740] [2022-03-19 01:14:05,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:05,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998221638] [2022-03-19 01:14:05,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998221638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:05,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:05,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 01:14:05,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265788551] [2022-03-19 01:14:05,735 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:05,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 01:14:05,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:05,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 01:14:05,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 01:14:05,736 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 01:14:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:05,801 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-19 01:14:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 01:14:05,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-03-19 01:14:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:05,803 INFO L225 Difference]: With dead ends: 39 [2022-03-19 01:14:05,803 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 01:14:05,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 01:14:05,804 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:05,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:14:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 01:14:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 01:14:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:14:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-19 01:14:05,811 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-19 01:14:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:05,812 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-19 01:14:05,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 01:14:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-19 01:14:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 01:14:05,813 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:05,813 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:05,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-19 01:14:06,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:06,034 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-03-19 01:14:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:06,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714430809] [2022-03-19 01:14:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:06,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:06,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728417866] [2022-03-19 01:14:06,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 01:14:06,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:06,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:06,045 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 01:14:06,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 01:14:06,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 01:14:06,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:06,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 01:14:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 01:14:06,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:06,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714430809] [2022-03-19 01:14:06,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:06,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728417866] [2022-03-19 01:14:06,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728417866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:06,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:06,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-19 01:14:06,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108660451] [2022-03-19 01:14:06,395 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:06,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 01:14:06,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:06,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 01:14:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 01:14:06,397 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 01:14:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:06,466 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-03-19 01:14:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 01:14:06,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-19 01:14:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:06,468 INFO L225 Difference]: With dead ends: 42 [2022-03-19 01:14:06,468 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 01:14:06,468 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 01:14:06,469 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:06,470 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:14:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 01:14:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 01:14:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 01:14:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-19 01:14:06,477 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-19 01:14:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:06,477 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-19 01:14:06,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 01:14:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-19 01:14:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 01:14:06,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:06,478 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:06,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:06,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:06,702 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:06,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-03-19 01:14:06,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:06,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055938461] [2022-03-19 01:14:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:06,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:06,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:06,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528835506] [2022-03-19 01:14:06,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 01:14:06,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:06,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:06,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:06,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 01:14:06,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 01:14:06,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:06,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 01:14:06,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 01:14:07,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:07,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:07,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055938461] [2022-03-19 01:14:07,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:07,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528835506] [2022-03-19 01:14:07,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528835506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:07,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:07,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 01:14:07,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519784102] [2022-03-19 01:14:07,169 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:07,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 01:14:07,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:07,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 01:14:07,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 01:14:07,170 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 01:14:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:07,252 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-03-19 01:14:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 01:14:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-19 01:14:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:07,253 INFO L225 Difference]: With dead ends: 45 [2022-03-19 01:14:07,254 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 01:14:07,254 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 01:14:07,255 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:07,255 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:14:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 01:14:07,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-19 01:14:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 01:14:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-19 01:14:07,263 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-19 01:14:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:07,264 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-19 01:14:07,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 01:14:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-19 01:14:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 01:14:07,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:07,265 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:07,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:07,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:07,471 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-03-19 01:14:07,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295207679] [2022-03-19 01:14:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:07,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:07,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:07,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818463611] [2022-03-19 01:14:07,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 01:14:07,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:07,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:07,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:07,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 01:14:07,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 01:14:07,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 01:14:07,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 01:14:07,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:08,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:08,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295207679] [2022-03-19 01:14:08,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:08,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818463611] [2022-03-19 01:14:08,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818463611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:08,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:08,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 01:14:08,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407832201] [2022-03-19 01:14:08,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:08,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 01:14:08,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:08,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 01:14:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-19 01:14:08,082 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 01:14:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:08,198 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-19 01:14:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 01:14:08,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-19 01:14:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:08,200 INFO L225 Difference]: With dead ends: 48 [2022-03-19 01:14:08,200 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 01:14:08,200 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-19 01:14:08,201 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:08,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:14:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 01:14:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-19 01:14:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 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 01:14:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-19 01:14:08,212 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-19 01:14:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:08,213 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-19 01:14:08,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 01:14:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-19 01:14:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 01:14:08,217 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:08,217 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:08,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:08,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:08,431 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:08,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-03-19 01:14:08,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:08,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303841995] [2022-03-19 01:14:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:08,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:08,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:08,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256022751] [2022-03-19 01:14:08,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 01:14:08,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:08,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:08,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:08,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 01:14:08,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-19 01:14:08,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:08,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 01:14:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 01:14:08,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:08,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:08,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303841995] [2022-03-19 01:14:08,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:08,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256022751] [2022-03-19 01:14:08,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256022751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:08,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:08,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 01:14:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009433139] [2022-03-19 01:14:08,938 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:08,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 01:14:08,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 01:14:08,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 01:14:08,939 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 01:14:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:09,065 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-03-19 01:14:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 01:14:09,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-19 01:14:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:09,066 INFO L225 Difference]: With dead ends: 51 [2022-03-19 01:14:09,066 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 01:14:09,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 01:14:09,067 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:09,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:14:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 01:14:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 01:14:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 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 01:14:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-19 01:14:09,075 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-19 01:14:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:09,075 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-19 01:14:09,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 01:14:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-19 01:14:09,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 01:14:09,076 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:09,076 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:09,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:09,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:09,282 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-03-19 01:14:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:09,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472134295] [2022-03-19 01:14:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:09,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:09,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108535443] [2022-03-19 01:14:09,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 01:14:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:09,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:09,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:09,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 01:14:09,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 01:14:09,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 01:14:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 01:14:09,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:09,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472134295] [2022-03-19 01:14:09,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:09,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108535443] [2022-03-19 01:14:09,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108535443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:09,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:09,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 01:14:09,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420819073] [2022-03-19 01:14:09,898 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:09,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 01:14:09,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 01:14:09,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-19 01:14:09,900 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 01:14:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:10,051 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-19 01:14:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 01:14:10,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-03-19 01:14:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:10,052 INFO L225 Difference]: With dead ends: 54 [2022-03-19 01:14:10,052 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 01:14:10,052 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-19 01:14:10,053 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:10,053 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:14:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 01:14:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-19 01:14:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 01:14:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-19 01:14:10,061 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-19 01:14:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:10,061 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-19 01:14:10,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 01:14:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-19 01:14:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 01:14:10,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:10,062 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:10,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:10,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 01:14:10,272 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:10,273 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-03-19 01:14:10,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:10,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670497117] [2022-03-19 01:14:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:10,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:10,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:10,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462117168] [2022-03-19 01:14:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 01:14:10,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:10,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:10,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:10,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 01:14:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:14:10,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 01:14:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 01:14:10,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:11,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670497117] [2022-03-19 01:14:11,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:11,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462117168] [2022-03-19 01:14:11,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462117168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:11,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:11,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 01:14:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773319425] [2022-03-19 01:14:11,089 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:11,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 01:14:11,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:11,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 01:14:11,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 01:14:11,091 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 01:14:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:11,258 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-03-19 01:14:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 01:14:11,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-03-19 01:14:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:11,260 INFO L225 Difference]: With dead ends: 57 [2022-03-19 01:14:11,260 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 01:14:11,260 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-19 01:14:11,261 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:11,261 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:14:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 01:14:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 01:14:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:14:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-19 01:14:11,269 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-19 01:14:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:11,269 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-19 01:14:11,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 01:14:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-19 01:14:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 01:14:11,270 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:11,271 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:11,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:11,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 01:14:11,477 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-03-19 01:14:11,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:11,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306554885] [2022-03-19 01:14:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:11,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:11,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:11,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787461260] [2022-03-19 01:14:11,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 01:14:11,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:11,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:11,488 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:11,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 01:14:12,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 01:14:12,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:12,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 01:14:12,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 01:14:12,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:12,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:12,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306554885] [2022-03-19 01:14:12,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:12,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787461260] [2022-03-19 01:14:12,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787461260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:12,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:12,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 01:14:12,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623798413] [2022-03-19 01:14:12,565 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:12,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 01:14:12,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 01:14:12,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 01:14:12,569 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 01:14:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:12,759 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-19 01:14:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 01:14:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-03-19 01:14:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:12,761 INFO L225 Difference]: With dead ends: 60 [2022-03-19 01:14:12,761 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 01:14:12,761 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-19 01:14:12,762 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:12,762 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 01:14:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 01:14:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 01:14:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 01:14:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-19 01:14:12,770 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-19 01:14:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:12,770 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-19 01:14:12,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 01:14:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-19 01:14:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 01:14:12,771 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:12,771 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:12,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:12,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 01:14:12,972 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:12,973 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-03-19 01:14:12,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:12,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4739185] [2022-03-19 01:14:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:12,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:12,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:12,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779936518] [2022-03-19 01:14:12,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 01:14:12,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:12,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:12,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:12,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 01:14:13,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-19 01:14:13,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:13,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 01:14:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 01:14:13,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:13,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:13,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4739185] [2022-03-19 01:14:13,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:13,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779936518] [2022-03-19 01:14:13,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779936518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:13,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:13,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 01:14:13,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705114226] [2022-03-19 01:14:13,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:13,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 01:14:13,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 01:14:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-19 01:14:13,944 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 01:14:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:14,151 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-03-19 01:14:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 01:14:14,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-03-19 01:14:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:14,154 INFO L225 Difference]: With dead ends: 63 [2022-03-19 01:14:14,154 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 01:14:14,156 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-19 01:14:14,157 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:14,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 01:14:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 01:14:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-19 01:14:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 01:14:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-19 01:14:14,177 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-19 01:14:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:14,177 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-19 01:14:14,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 01:14:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-19 01:14:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 01:14:14,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:14,182 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:14,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:14,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 01:14:14,389 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-03-19 01:14:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:14,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193102685] [2022-03-19 01:14:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:14,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:14,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043256355] [2022-03-19 01:14:14,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 01:14:14,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:14,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:14,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:14,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 01:14:14,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 01:14:14,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 01:14:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 01:14:15,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:14:15,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193102685] [2022-03-19 01:14:15,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043256355] [2022-03-19 01:14:15,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043256355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:14:15,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:14:15,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 01:14:15,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865440831] [2022-03-19 01:14:15,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:14:15,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 01:14:15,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:15,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 01:14:15,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-19 01:14:15,236 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 01:14:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:15,446 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-19 01:14:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 01:14:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-03-19 01:14:15,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:15,447 INFO L225 Difference]: With dead ends: 66 [2022-03-19 01:14:15,447 INFO L226 Difference]: Without dead ends: 61 [2022-03-19 01:14:15,447 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 01:14:15,448 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:15,448 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 01:14:15,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-19 01:14:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-19 01:14:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 01:14:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-19 01:14:15,455 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-19 01:14:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:15,456 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-19 01:14:15,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 01:14:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-19 01:14:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 01:14:15,457 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:14:15,457 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:14:15,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:15,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 01:14:15,663 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:14:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:14:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-03-19 01:14:15,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:14:15,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342614921] [2022-03-19 01:14:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:14:15,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:14:15,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:14:15,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104189133] [2022-03-19 01:14:15,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 01:14:15,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:14:15,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:14:15,674 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 01:14:15,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 01:14:15,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-19 01:14:15,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:14:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 01:14:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:14:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-19 01:14:16,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 01:14:16,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:14:16,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342614921] [2022-03-19 01:14:16,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:14:16,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104189133] [2022-03-19 01:14:16,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104189133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:14:16,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:14:16,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 01:14:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784040325] [2022-03-19 01:14:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:14:16,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 01:14:16,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:14:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 01:14:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-03-19 01:14:16,188 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 01:14:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:14:16,274 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-03-19 01:14:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 01:14:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-03-19 01:14:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:14:16,275 INFO L225 Difference]: With dead ends: 65 [2022-03-19 01:14:16,275 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 01:14:16,275 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-03-19 01:14:16,276 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:14:16,276 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 204 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 01:14:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 01:14:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 01:14:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 01:14:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 01:14:16,277 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2022-03-19 01:14:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:14:16,277 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 01:14:16,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 01:14:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 01:14:16,277 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 01:14:16,279 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 01:14:16,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 01:14:16,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 01:14:16,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 01:14:17,037 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 01:14:17,037 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-19 01:14:17,037 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-19 01:14:17,037 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 01:14:17,037 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 01:14:17,037 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-19 01:14:17,038 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-19 01:14:17,038 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-03-19 01:14:17,038 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-19 01:14:17,038 INFO L882 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2022-03-19 01:14:17,038 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-03-19 01:14:17,038 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2022-03-19 01:14:17,038 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-03-19 01:14:17,038 INFO L882 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2022-03-19 01:14:17,038 INFO L878 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 10)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (<= 10 main_~c~0) .cse0 (= main_~y~0 10) (<= main_~c~0 10) (< 9 main_~k~0) .cse1) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1) (and (= 7 main_~y~0) .cse0 (= 7 main_~c~0) .cse1 (< 6 main_~k~0)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 1) .cse1 (< main_~c~0 (+ main_~k~0 1)) (= main_~c~0 1)) (and (< 7 main_~k~0) .cse0 (= main_~y~0 8) (= main_~c~0 8) .cse1) (and .cse0 (= main_~y~0 9) (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) (< 2 main_~k~0) .cse1 (= main_~c~0 3)))) [2022-03-19 01:14:17,038 INFO L878 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse1 (+ (- 1) main_~y~0)) (.cse2 (+ (- 2) main_~y~0)) (.cse0 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (<= main_~c~0 3) (<= main_~k~0 3) (= (+ main_~y~0 (- 3)) 0) (< 2 main_~k~0) .cse0) (and (= main_~y~0 9) (<= main_~k~0 9) (< 8 main_~k~0) (<= main_~c~0 9) .cse0) (and (< 1 main_~k~0) (= .cse1 1) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (<= main_~k~0 6) (< 5 main_~k~0) (= .cse2 4) .cse0 (<= main_~c~0 6)) (and (= .cse1 0) (<= main_~k~0 1) (< 0 main_~k~0) .cse0 (<= main_~c~0 1)) (and (<= main_~c~0 5) (<= main_~k~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0)) (and (= main_~y~0 4) (< 3 main_~k~0) (<= main_~k~0 4) .cse0 (<= main_~c~0 4)) (and (<= main_~k~0 7) (<= main_~c~0 7) (= 2 (+ main_~y~0 (- 5))) .cse0 (< 6 main_~k~0)) (and (<= main_~k~0 10) (= main_~y~0 10) (<= main_~c~0 10) (< 9 main_~k~0) .cse0) (and (< 7 main_~k~0) (<= main_~c~0 8) (= .cse2 6) (<= main_~k~0 8) .cse0))) [2022-03-19 01:14:17,038 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 10)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (<= 10 main_~c~0) .cse0 (= main_~y~0 10) (<= main_~c~0 10) (< 9 main_~k~0) .cse1) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1) (and (= 7 main_~y~0) .cse0 (= 7 main_~c~0) .cse1 (< 6 main_~k~0)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 1) .cse1 (< main_~c~0 (+ main_~k~0 1)) (= main_~c~0 1)) (and (< 7 main_~k~0) .cse0 (= main_~y~0 8) (= main_~c~0 8) .cse1) (and .cse0 (= main_~y~0 9) (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) (< 2 main_~k~0) .cse1 (= main_~c~0 3)))) [2022-03-19 01:14:17,038 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)) [2022-03-19 01:14:17,038 INFO L882 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2022-03-19 01:14:17,039 INFO L882 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2022-03-19 01:14:17,039 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 17 40) no Hoare annotation was computed. [2022-03-19 01:14:17,039 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 17 40) no Hoare annotation was computed. [2022-03-19 01:14:17,039 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-03-19 01:14:17,039 INFO L882 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-03-19 01:14:17,039 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-03-19 01:14:17,039 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-03-19 01:14:17,039 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-03-19 01:14:17,039 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-03-19 01:14:17,041 INFO L718 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2022-03-19 01:14:17,042 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 01:14:17,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:14:17 BasicIcfg [2022-03-19 01:14:17,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 01:14:17,057 INFO L158 Benchmark]: Toolchain (without parser) took 14004.37ms. Allocated memory was 182.5MB in the beginning and 220.2MB in the end (delta: 37.7MB). Free memory was 133.8MB in the beginning and 123.5MB in the end (delta: 10.2MB). Peak memory consumption was 48.9MB. Max. memory is 8.0GB. [2022-03-19 01:14:17,057 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory was 150.5MB in the beginning and 150.4MB in the end (delta: 91.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 01:14:17,057 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.49ms. Allocated memory is still 182.5MB. Free memory was 133.5MB in the beginning and 161.4MB in the end (delta: -27.9MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-03-19 01:14:17,057 INFO L158 Benchmark]: Boogie Preprocessor took 21.10ms. Allocated memory is still 182.5MB. Free memory was 161.4MB in the beginning and 160.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 01:14:17,057 INFO L158 Benchmark]: RCFGBuilder took 241.64ms. Allocated memory is still 182.5MB. Free memory was 160.3MB in the beginning and 149.9MB in the end (delta: 10.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-19 01:14:17,058 INFO L158 Benchmark]: IcfgTransformer took 22.17ms. Allocated memory is still 182.5MB. Free memory was 149.9MB in the beginning and 148.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 01:14:17,058 INFO L158 Benchmark]: TraceAbstraction took 13479.98ms. Allocated memory was 182.5MB in the beginning and 220.2MB in the end (delta: 37.7MB). Free memory was 148.3MB in the beginning and 123.5MB in the end (delta: 24.7MB). Peak memory consumption was 63.5MB. Max. memory is 8.0GB. [2022-03-19 01:14:17,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory was 150.5MB in the beginning and 150.4MB in the end (delta: 91.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 233.49ms. Allocated memory is still 182.5MB. Free memory was 133.5MB in the beginning and 161.4MB in the end (delta: -27.9MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.10ms. Allocated memory is still 182.5MB. Free memory was 161.4MB in the beginning and 160.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 241.64ms. Allocated memory is still 182.5MB. Free memory was 160.3MB in the beginning and 149.9MB in the end (delta: 10.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 22.17ms. Allocated memory is still 182.5MB. Free memory was 149.9MB in the beginning and 148.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 13479.98ms. Allocated memory was 182.5MB in the beginning and 220.2MB in the end (delta: 37.7MB). Free memory was 148.3MB in the beginning and 123.5MB in the end (delta: 24.7MB). Peak memory consumption was 63.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.4s, OverallIterations: 14, TraceHistogramMax: 13, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 58 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51 mSDsluCounter, 3782 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3282 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1803 IncrementalHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 500 mSDtfsCounter, 1803 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 962 GetRequests, 774 SyntacticMatches, 12 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=13, InterpolantAutomatonStates: 144, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 39 PreInvPairs, 74 NumberOfFragments, 1088 HoareAnnotationTreeSize, 39 FomulaSimplifications, 474 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 773 NumberOfCodeBlocks, 769 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 3026 SizeOfPredicates, 23 NumberOfNonLiveVariables, 2079 ConjunctsInSsa, 337 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 1502/2164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((((((((((k <= 10 && 0 <= k) && c == 0) && y == 0) && y * y * y * y + y * y + y * y * y * 2 == x * 4) || ((((y == 6 && k <= 10) && c == 6) && 5 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 10 && y == 4) && c == 4) && 3 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || (((((10 <= c && k <= 10) && y == 10) && c <= 10) && 9 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((y == 2 && k <= 10) && 1 < k) && c == 2) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((7 == y && k <= 10) && 7 == c) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 6 < k)) || ((((k <= 10 && 5 == c) && 5 == y) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 4 < k)) || ((((k <= 10 && y == 1) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c < k + 1) && c == 1)) || ((((7 < k && k <= 10) && y == 8) && c == 8) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 10 && y == 9) && c == 9) && 8 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 10 && y == 3) && 2 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c == 3) RESULT: Ultimate proved your program to be correct! [2022-03-19 01:14:17,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...