/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/ps6-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 13:34:26,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 13:34:26,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 13:34:26,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 13:34:26,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 13:34:26,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 13:34:26,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 13:34:26,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 13:34:26,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 13:34:26,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 13:34:26,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 13:34:26,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 13:34:26,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 13:34:26,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 13:34:26,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 13:34:26,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 13:34:26,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 13:34:26,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 13:34:26,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 13:34:26,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 13:34:26,224 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 13:34:26,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 13:34:26,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 13:34:26,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 13:34:26,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 13:34:26,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 13:34:26,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 13:34:26,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 13:34:26,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 13:34:26,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 13:34:26,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 13:34:26,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 13:34:26,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 13:34:26,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 13:34:26,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 13:34:26,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 13:34:26,272 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 13:34:26,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 13:34:26,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 13:34:26,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 13:34:26,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 13:34:26,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 13:34:26,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 13:34:26,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 13:34:26,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:34:26,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 13:34:26,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 13:34:26,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 13:34:26,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 13:34:26,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 13:34:26,274 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 13:34:26,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 13:34:26,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 13:34:26,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 13:34:26,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 13:34:26,521 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 13:34:26,521 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 13:34:26,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2022-04-06 13:34:26,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36cec3805/30a292154ff24a6a8718ddce0b97de37/FLAGa2778d0c1 [2022-04-06 13:34:26,962 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 13:34:26,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2022-04-06 13:34:26,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36cec3805/30a292154ff24a6a8718ddce0b97de37/FLAGa2778d0c1 [2022-04-06 13:34:26,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36cec3805/30a292154ff24a6a8718ddce0b97de37 [2022-04-06 13:34:26,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 13:34:26,979 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 13:34:26,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 13:34:26,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 13:34:26,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 13:34:26,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:34:26" (1/1) ... [2022-04-06 13:34:26,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aa4b027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:26, skipping insertion in model container [2022-04-06 13:34:26,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:34:26" (1/1) ... [2022-04-06 13:34:26,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 13:34:27,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 13:34:27,153 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2022-04-06 13:34:27,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:34:27,182 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 13:34:27,193 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/ps6-ll_valuebound5.c[458,471] [2022-04-06 13:34:27,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:34:27,221 INFO L208 MainTranslator]: Completed translation [2022-04-06 13:34:27,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27 WrapperNode [2022-04-06 13:34:27,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 13:34:27,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 13:34:27,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 13:34:27,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 13:34:27,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 13:34:27,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 13:34:27,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 13:34:27,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 13:34:27,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:34:27,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:34:27,281 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) [2022-04-06 13:34:27,291 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 [2022-04-06 13:34:27,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 13:34:27,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 13:34:27,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 13:34:27,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 13:34:27,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 13:34:27,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 13:34:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 13:34:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 13:34:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 13:34:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 13:34:27,374 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 13:34:27,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 13:34:27,495 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 13:34:27,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 13:34:27,511 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 13:34:27,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:34:27 BoogieIcfgContainer [2022-04-06 13:34:27,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 13:34:27,513 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 13:34:27,513 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 13:34:27,523 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 13:34:27,525 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:34:27" (1/1) ... [2022-04-06 13:34:27,529 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 13:34:27,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:34:27 BasicIcfg [2022-04-06 13:34:27,566 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 13:34:27,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 13:34:27,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 13:34:27,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 13:34:27,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:34:26" (1/4) ... [2022-04-06 13:34:27,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237ffe5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:34:27, skipping insertion in model container [2022-04-06 13:34:27,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:34:27" (2/4) ... [2022-04-06 13:34:27,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237ffe5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:34:27, skipping insertion in model container [2022-04-06 13:34:27,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:34:27" (3/4) ... [2022-04-06 13:34:27,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237ffe5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:34:27, skipping insertion in model container [2022-04-06 13:34:27,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:34:27" (4/4) ... [2022-04-06 13:34:27,580 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.cqvasr [2022-04-06 13:34:27,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 13:34:27,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 13:34:27,625 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 13:34:27,631 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 [2022-04-06 13:34:27,632 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 13:34:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 13:34:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 13:34:27,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:34:27,650 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:34:27,651 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:34:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:34:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-04-06 13:34:27,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:34:27,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682437916] [2022-04-06 13:34:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:34:27,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:34:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:34:27,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:34:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:34:27,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 13:34:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:34:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 13:34:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:34:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 13:34:27,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:34:27,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682437916] [2022-04-06 13:34:27,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682437916] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:34:27,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:34:27,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 13:34:27,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129329430] [2022-04-06 13:34:27,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:34:27,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 13:34:27,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:34:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 13:34:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:34:27,876 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 13:34:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:34:27,944 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-04-06 13:34:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 13:34:27,947 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 13:34:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:34:27,952 INFO L225 Difference]: With dead ends: 51 [2022-04-06 13:34:27,952 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 13:34:27,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:34:27,959 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:34:27,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:34:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 13:34:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 13:34:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 13:34:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-06 13:34:27,987 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-04-06 13:34:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:34:27,987 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-06 13:34:27,987 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 13:34:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-06 13:34:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 13:34:27,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:34:27,988 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:34:27,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 13:34:27,990 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:34:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:34:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-04-06 13:34:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:34:27,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996127429] [2022-04-06 13:34:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:34:27,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:34:28,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:34:28,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659178303] [2022-04-06 13:34:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:34:28,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:34:28,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:34:28,033 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) [2022-04-06 13:34:28,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 13:34:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:34:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 13:34:28,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:34:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 13:34:28,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:34:28,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:34:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996127429] [2022-04-06 13:34:28,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:34:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659178303] [2022-04-06 13:34:28,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659178303] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:34:28,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:34:28,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 13:34:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044775116] [2022-04-06 13:34:28,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:34:28,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:34:28,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:34:28,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:34:28,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:34:28,208 INFO L87 Difference]: Start difference. First operand 24 states and 27 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 13:34:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:34:28,385 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-04-06 13:34:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:34:28,385 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-04-06 13:34:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:34:28,386 INFO L225 Difference]: With dead ends: 35 [2022-04-06 13:34:28,386 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 13:34:28,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 13:34:28,387 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 13:34:28,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 13:34:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 13:34:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 13:34:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 13:34:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-04-06 13:34:28,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-04-06 13:34:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:34:28,394 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-04-06 13:34:28,394 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 13:34:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-04-06 13:34:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 13:34:28,395 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:34:28,395 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:34:28,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 13:34:28,595 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 [2022-04-06 13:34:28,596 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:34:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:34:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-04-06 13:34:28,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:34:28,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080166337] [2022-04-06 13:34:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:34:28,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:34:28,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:34:28,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897017464] [2022-04-06 13:34:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:34:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:34:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:34:28,607 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) [2022-04-06 13:34:28,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 13:34:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:34:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 13:34:28,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:34:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 13:34:28,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:34:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 13:34:29,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:34:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080166337] [2022-04-06 13:34:29,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:34:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897017464] [2022-04-06 13:34:29,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897017464] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 13:34:29,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:34:29,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 13:34:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972219756] [2022-04-06 13:34:29,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:34:29,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:34:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:34:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:34:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 13:34:29,038 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 13:34:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:34:29,072 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-04-06 13:34:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:34:29,072 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-06 13:34:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:34:29,073 INFO L225 Difference]: With dead ends: 37 [2022-04-06 13:34:29,073 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 13:34:29,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 13:34:29,074 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:34:29,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:34:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 13:34:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 13:34:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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) [2022-04-06 13:34:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-06 13:34:29,081 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-04-06 13:34:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:34:29,082 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-06 13:34:29,082 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 13:34:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-06 13:34:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 13:34:29,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:34:29,083 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:34:29,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 13:34:29,287 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 [2022-04-06 13:34:29,288 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:34:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:34:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-04-06 13:34:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:34:29,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459374119] [2022-04-06 13:34:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:34:29,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:34:29,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:34:29,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929588665] [2022-04-06 13:34:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:34:29,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:34:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:34:29,310 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) [2022-04-06 13:34:29,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 13:34:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:34:29,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 13:34:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:34:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 13:34:29,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:34:29,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:34:29,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459374119] [2022-04-06 13:34:29,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:34:29,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929588665] [2022-04-06 13:34:29,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929588665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:34:29,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:34:29,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 13:34:29,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509866215] [2022-04-06 13:34:29,697 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:34:29,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 13:34:29,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:34:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 13:34:29,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 13:34:29,698 INFO L87 Difference]: Start difference. First operand 33 states and 35 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 13:34:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:34:29,757 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-06 13:34:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 13:34:29,757 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-04-06 13:34:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:34:29,758 INFO L225 Difference]: With dead ends: 42 [2022-04-06 13:34:29,758 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 13:34:29,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:34:29,759 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:34:29,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:34:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 13:34:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 13:34:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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) [2022-04-06 13:34:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-04-06 13:34:29,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-04-06 13:34:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:34:29,765 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-04-06 13:34:29,765 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 13:34:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-06 13:34:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 13:34:29,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:34:29,766 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:34:29,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 13:34:29,985 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 [2022-04-06 13:34:29,985 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:34:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:34:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-04-06 13:34:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:34:29,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095430127] [2022-04-06 13:34:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:34:29,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:34:29,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:34:29,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500730730] [2022-04-06 13:34:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 13:34:29,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:34:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:34:29,996 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) [2022-04-06 13:34:30,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 13:34:30,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 13:34:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:34:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 13:34:30,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:34:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 13:34:30,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:35:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:35:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095430127] [2022-04-06 13:35:08,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:35:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500730730] [2022-04-06 13:35:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500730730] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:35:08,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:35:08,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 13:35:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197006236] [2022-04-06 13:35:08,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:35:08,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 13:35:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:35:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 13:35:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-04-06 13:35:08,713 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 13:35:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:35:08,881 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-04-06 13:35:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 13:35:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-04-06 13:35:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:35:08,882 INFO L225 Difference]: With dead ends: 45 [2022-04-06 13:35:08,882 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 13:35:08,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-04-06 13:35:08,883 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:35:08,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 159 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:35:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 13:35:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 13:35:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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) [2022-04-06 13:35:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-04-06 13:35:08,889 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-04-06 13:35:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:35:08,889 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-04-06 13:35:08,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 13:35:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-04-06 13:35:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 13:35:08,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:35:08,891 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:35:08,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 13:35:09,091 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 [2022-04-06 13:35:09,091 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:35:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:35:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-04-06 13:35:09,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:35:09,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868501598] [2022-04-06 13:35:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:35:09,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:35:09,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:35:09,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484934167] [2022-04-06 13:35:09,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 13:35:09,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:35:09,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:35:09,109 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) [2022-04-06 13:35:09,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 13:35:09,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 13:35:09,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:35:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 13:35:09,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:35:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 13:35:09,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:35:09,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:35:09,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868501598] [2022-04-06 13:35:09,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:35:09,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484934167] [2022-04-06 13:35:09,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484934167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:35:09,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:35:09,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 13:35:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005824355] [2022-04-06 13:35:09,481 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:35:09,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 13:35:09,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:35:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 13:35:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:35:09,482 INFO L87 Difference]: Start difference. First operand 39 states and 43 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 13:35:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:35:09,606 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-04-06 13:35:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 13:35:09,606 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-04-06 13:35:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:35:09,607 INFO L225 Difference]: With dead ends: 48 [2022-04-06 13:35:09,607 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 13:35:09,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-06 13:35:09,609 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:35:09,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:35:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 13:35:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 13:35:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2022-04-06 13:35:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-06 13:35:09,625 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-04-06 13:35:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:35:09,626 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-06 13:35:09,627 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 13:35:09,627 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-06 13:35:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 13:35:09,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:35:09,637 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:35:09,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 13:35:09,842 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 [2022-04-06 13:35:09,842 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:35:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:35:09,842 INFO L85 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2022-04-06 13:35:09,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:35:09,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581279093] [2022-04-06 13:35:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:35:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:35:09,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:35:09,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70703936] [2022-04-06 13:35:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 13:35:09,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:35:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:35:09,855 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) [2022-04-06 13:35:09,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 13:35:09,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 13:35:09,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:35:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 13:35:09,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:35:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 13:35:10,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:35:10,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:35:10,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581279093] [2022-04-06 13:35:10,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:35:10,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70703936] [2022-04-06 13:35:10,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70703936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:35:10,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:35:10,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 13:35:10,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311100433] [2022-04-06 13:35:10,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:35:10,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 13:35:10,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:35:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 13:35:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 13:35:10,249 INFO L87 Difference]: Start difference. First operand 42 states and 47 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-06 13:35:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:35:10,371 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-04-06 13:35:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 13:35:10,371 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-04-06 13:35:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:35:10,372 INFO L225 Difference]: With dead ends: 51 [2022-04-06 13:35:10,372 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 13:35:10,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 13:35:10,373 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:35:10,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 234 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:35:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 13:35:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 13:35:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2022-04-06 13:35:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-06 13:35:10,379 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-04-06 13:35:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:35:10,379 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-06 13:35:10,379 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-06 13:35:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-06 13:35:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 13:35:10,380 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:35:10,380 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:35:10,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 13:35:10,591 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 [2022-04-06 13:35:10,592 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:35:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:35:10,592 INFO L85 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2022-04-06 13:35:10,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:35:10,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760540017] [2022-04-06 13:35:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:35:10,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:35:10,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:35:10,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809460660] [2022-04-06 13:35:10,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 13:35:10,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:35:10,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:35:10,604 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) [2022-04-06 13:35:10,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 13:35:11,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-06 13:35:11,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:35:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 13:35:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:35:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 13:35:11,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:35:11,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:35:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760540017] [2022-04-06 13:35:11,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:35:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809460660] [2022-04-06 13:35:11,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809460660] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:35:11,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:35:11,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 13:35:11,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433831812] [2022-04-06 13:35:11,472 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:35:11,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 13:35:11,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:35:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 13:35:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 13:35:11,473 INFO L87 Difference]: Start difference. First operand 45 states and 51 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-06 13:35:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:35:11,608 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-04-06 13:35:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 13:35:11,608 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-04-06 13:35:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:35:11,609 INFO L225 Difference]: With dead ends: 54 [2022-04-06 13:35:11,609 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 13:35:11,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 13:35:11,609 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:35:11,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 271 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:35:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 13:35:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 13:35:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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) [2022-04-06 13:35:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-04-06 13:35:11,615 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-04-06 13:35:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:35:11,616 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-04-06 13:35:11,616 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-06 13:35:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-04-06 13:35:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 13:35:11,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:35:11,616 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:35:11,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 13:35:11,822 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 [2022-04-06 13:35:11,822 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:35:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:35:11,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2022-04-06 13:35:11,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:35:11,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624318729] [2022-04-06 13:35:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:35:11,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:35:11,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:35:11,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349986688] [2022-04-06 13:35:11,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 13:35:11,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:35:11,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:35:11,831 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) [2022-04-06 13:35:11,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 13:35:12,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 13:35:12,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:35:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 13:35:12,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:35:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 123 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 13:35:12,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:35:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 13:35:12,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:35:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624318729] [2022-04-06 13:35:12,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:35:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349986688] [2022-04-06 13:35:12,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349986688] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:35:12,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:35:12,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-04-06 13:35:12,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737888744] [2022-04-06 13:35:12,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:35:12,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 13:35:12,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:35:12,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 13:35:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-04-06 13:35:12,584 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-04-06 13:35:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:35:12,668 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-04-06 13:35:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 13:35:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) Word has length 75 [2022-04-06 13:35:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:35:12,669 INFO L225 Difference]: With dead ends: 54 [2022-04-06 13:35:12,669 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 13:35:12,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-04-06 13:35:12,670 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:35:12,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 224 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:35:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 13:35:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 13:35:12,671 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) [2022-04-06 13:35:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 13:35:12,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2022-04-06 13:35:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:35:12,671 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 13:35:12,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-04-06 13:35:12,671 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 13:35:12,671 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 13:35:12,673 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 13:35:12,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 13:35:12,879 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 [2022-04-06 13:35:12,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 13:35:13,313 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|)) [2022-04-06 13:35:13,313 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 13:35:13,313 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 13:35:13,313 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 13:35:13,313 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 13:35:13,313 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 13:35:13,313 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 13:35:13,313 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-04-06 13:35:13,314 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-04-06 13:35:13,314 INFO L882 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2022-04-06 13:35:13,314 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-04-06 13:35:13,314 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 17 42) the Hoare annotation is: true [2022-04-06 13:35:13,314 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-04-06 13:35:13,314 INFO L878 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= main_~k~0 5) (<= 0 main_~k~0)) [2022-04-06 13:35:13,314 INFO L882 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2022-04-06 13:35:13,314 INFO L878 garLoopResultBuilder]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (= (+ (* 2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 5 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (+ (* main_~x~0 12) (* main_~y~0 main_~y~0))))) (or (and .cse0 (<= 0 main_~k~0) .cse1 (= main_~c~0 0) (= main_~y~0 0)) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1) (and .cse0 (= main_~y~0 1) .cse1 (< 0 main_~k~0) (= main_~c~0 1)) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< 2 main_~k~0) (= main_~c~0 3)) (and (<= main_~c~0 5) .cse0 .cse1 (= 5 main_~y~0) (<= 5 main_~c~0) (< 4 main_~k~0)))) [2022-04-06 13:35:13,314 INFO L878 garLoopResultBuilder]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse0 (= (+ (* 2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 5 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (+ (* main_~x~0 12) (* main_~y~0 main_~y~0))))) (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (<= main_~c~0 5) (<= main_~k~0 5) .cse0 (= 5 main_~y~0) (< 4 main_~k~0)) (and (<= main_~k~0 1) (= main_~y~0 1) .cse0 (< 0 main_~k~0) (<= main_~c~0 1)) (and (= main_~y~0 4) (< 3 main_~k~0) (<= main_~k~0 4) .cse0 (<= main_~c~0 4)) (and (<= main_~c~0 3) (= main_~y~0 3) (<= main_~k~0 3) .cse0 (< 2 main_~k~0)))) [2022-04-06 13:35:13,314 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (= (+ (* 2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 5 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (+ (* main_~x~0 12) (* main_~y~0 main_~y~0))))) (or (and .cse0 (<= 0 main_~k~0) .cse1 (= main_~c~0 0) (= main_~y~0 0)) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1) (and .cse0 (= main_~y~0 1) .cse1 (< 0 main_~k~0) (= main_~c~0 1)) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< 2 main_~k~0) (= main_~c~0 3)) (and (<= main_~c~0 5) .cse0 .cse1 (= 5 main_~y~0) (<= 5 main_~c~0) (< 4 main_~k~0)))) [2022-04-06 13:35:13,314 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (= (+ (* 2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* 5 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (+ (* main_~x~0 12) (* main_~y~0 main_~y~0))))) (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (<= main_~c~0 5) (<= main_~k~0 5) .cse0 (= 5 main_~y~0) (< 4 main_~k~0)) (and (<= main_~k~0 1) (= main_~y~0 1) .cse0 (< 0 main_~k~0) (<= main_~c~0 1)) (and (= main_~y~0 4) (< 3 main_~k~0) (<= main_~k~0 4) .cse0 (<= main_~c~0 4)) (and (<= main_~c~0 3) (= main_~y~0 3) (<= main_~k~0 3) .cse0 (< 2 main_~k~0)))) [2022-04-06 13:35:13,314 INFO L882 garLoopResultBuilder]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2022-04-06 13:35:13,315 INFO L882 garLoopResultBuilder]: For program point L40(line 40) no Hoare annotation was computed. [2022-04-06 13:35:13,315 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 17 42) no Hoare annotation was computed. [2022-04-06 13:35:13,315 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 17 42) no Hoare annotation was computed. [2022-04-06 13:35:13,315 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-04-06 13:35:13,315 INFO L882 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-04-06 13:35:13,315 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-04-06 13:35:13,315 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-04-06 13:35:13,315 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-04-06 13:35:13,315 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-04-06 13:35:13,317 INFO L719 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2022-04-06 13:35:13,318 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 13:35:13,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:35:13 BasicIcfg [2022-04-06 13:35:13,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 13:35:13,329 INFO L158 Benchmark]: Toolchain (without parser) took 46350.05ms. Allocated memory was 176.2MB in the beginning and 228.6MB in the end (delta: 52.4MB). Free memory was 121.8MB in the beginning and 144.1MB in the end (delta: -22.3MB). Peak memory consumption was 30.3MB. Max. memory is 8.0GB. [2022-04-06 13:35:13,329 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 137.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 13:35:13,330 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.99ms. Allocated memory is still 176.2MB. Free memory was 121.6MB in the beginning and 151.2MB in the end (delta: -29.6MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-04-06 13:35:13,330 INFO L158 Benchmark]: Boogie Preprocessor took 31.01ms. Allocated memory is still 176.2MB. Free memory was 151.2MB in the beginning and 149.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 13:35:13,330 INFO L158 Benchmark]: RCFGBuilder took 255.98ms. Allocated memory is still 176.2MB. Free memory was 149.7MB in the beginning and 139.5MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 13:35:13,330 INFO L158 Benchmark]: IcfgTransformer took 52.78ms. Allocated memory is still 176.2MB. Free memory was 139.5MB in the beginning and 138.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 13:35:13,331 INFO L158 Benchmark]: TraceAbstraction took 45762.05ms. Allocated memory was 176.2MB in the beginning and 228.6MB in the end (delta: 52.4MB). Free memory was 137.6MB in the beginning and 144.1MB in the end (delta: -6.5MB). Peak memory consumption was 46.8MB. Max. memory is 8.0GB. [2022-04-06 13:35:13,332 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 137.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 241.99ms. Allocated memory is still 176.2MB. Free memory was 121.6MB in the beginning and 151.2MB in the end (delta: -29.6MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.01ms. Allocated memory is still 176.2MB. Free memory was 151.2MB in the beginning and 149.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 255.98ms. Allocated memory is still 176.2MB. Free memory was 149.7MB in the beginning and 139.5MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 52.78ms. Allocated memory is still 176.2MB. Free memory was 139.5MB in the beginning and 138.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 45762.05ms. Allocated memory was 176.2MB in the beginning and 228.6MB in the end (delta: 52.4MB). Free memory was 137.6MB in the beginning and 144.1MB in the end (delta: -6.5MB). Peak memory consumption was 46.8MB. 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, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 45.7s, OverallIterations: 9, TraceHistogramMax: 9, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 1412 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1135 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 877 IncrementalHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 277 mSDtfsCounter, 877 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 613 GetRequests, 510 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 28.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=8, InterpolantAutomatonStates: 72, 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 37 PreInvPairs, 62 NumberOfFragments, 1056 HoareAnnotationTreeSize, 37 FomulaSimplifications, 162 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 170 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 40.9s InterpolantComputationTime, 418 NumberOfCodeBlocks, 409 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 511 ConstructedInterpolants, 0 QuantifiedInterpolants, 1804 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1049 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 695/809 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: 28]: Loop Invariant Derived loop invariant: ((((((((k <= 5 && 0 <= k) && 2 * (y * y * y * y * y * y) + 6 * (y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y) && c == 0) && y == 0) || ((((y == 2 && k <= 5) && 1 < k) && c == 2) && 2 * (y * y * y * y * y * y) + 6 * (y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y)) || ((((k <= 5 && y == 1) && 2 * (y * y * y * y * y * y) + 6 * (y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y) && 0 < k) && c == 1)) || ((((k <= 5 && y == 4) && c == 4) && 3 < k) && 2 * (y * y * y * y * y * y) + 6 * (y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y)) || ((((k <= 5 && y == 3) && 2 * (y * y * y * y * y * y) + 6 * (y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y) && 2 < k) && c == 3)) || (((((c <= 5 && k <= 5) && 2 * (y * y * y * y * y * y) + 6 * (y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y) && 5 == y) && 5 <= c) && 4 < k) RESULT: Ultimate proved your program to be correct! [2022-04-06 13:35:13,383 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...