/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/egcd-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:08:53,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:08:53,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:08:54,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 09:08:54,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:08:54,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:08:54,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:08:54,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:08:54,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:08:54,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:08:54,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:08:54,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:08:54,067 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:08:54,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:08:54,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:08:54,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:08:54,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:08:54,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:08:54,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:08:54,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:08:54,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:08:54,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:08:54,124 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:08:54,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:08:54,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:08:54,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:08:54,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:08:54,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:08:54,128 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:08:54,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:08:54,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:08:54,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:08:54,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:08:54,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:08:54,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:08:54,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:08:54,130 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:08:54,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:08:54,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:08:54,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:08:54,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:08:54,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:08:54,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:08:54,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:08:54,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:08:54,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:08:54,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:08:54,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:08:54,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:08:54,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:08:54,132 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:08:54,132 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:08:54,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:08:54,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:08:54,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:08:54,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:08:54,369 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:08:54,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-03-20 09:08:54,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88d617afa/41a9fdc4ccc0448f8f87361dc920e7c5/FLAG1e3dfa1fe [2022-03-20 09:08:54,870 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:08:54,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-03-20 09:08:54,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88d617afa/41a9fdc4ccc0448f8f87361dc920e7c5/FLAG1e3dfa1fe [2022-03-20 09:08:55,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88d617afa/41a9fdc4ccc0448f8f87361dc920e7c5 [2022-03-20 09:08:55,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:08:55,227 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:08:55,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:08:55,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:08:55,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:08:55,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@284b5961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55, skipping insertion in model container [2022-03-20 09:08:55,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:08:55,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:08:55,393 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/egcd-ll.c[489,502] [2022-03-20 09:08:55,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:08:55,410 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:08:55,417 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/egcd-ll.c[489,502] [2022-03-20 09:08:55,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:08:55,429 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:08:55,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55 WrapperNode [2022-03-20 09:08:55,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:08:55,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:08:55,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:08:55,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:08:55,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:08:55,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:08:55,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:08:55,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:08:55,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:08:55,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:55,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 09:08:55,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 09:08:55,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:08:55,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:08:55,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:08:55,507 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:08:55,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:08:55,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:08:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:08:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:08:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:08:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:08:55,549 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:08:55,550 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:08:55,629 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:08:55,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:08:55,633 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 09:08:55,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:08:55 BoogieIcfgContainer [2022-03-20 09:08:55,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:08:55,635 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:08:55,635 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:08:55,636 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:08:55,638 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:08:55" (1/1) ... [2022-03-20 09:08:55,639 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:08:55,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:08:55 BasicIcfg [2022-03-20 09:08:55,649 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:08:55,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:08:55,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:08:55,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:08:55,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:08:55" (1/4) ... [2022-03-20 09:08:55,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2bf237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:08:55, skipping insertion in model container [2022-03-20 09:08:55,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:55" (2/4) ... [2022-03-20 09:08:55,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2bf237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:08:55, skipping insertion in model container [2022-03-20 09:08:55,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:08:55" (3/4) ... [2022-03-20 09:08:55,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2bf237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:08:55, skipping insertion in model container [2022-03-20 09:08:55,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:08:55" (4/4) ... [2022-03-20 09:08:55,654 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll.cqvasr [2022-03-20 09:08:55,657 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:08:55,657 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:08:55,684 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:08:55,688 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 09:08:55,688 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:08:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 09:08:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 09:08:55,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:55,708 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:55,708 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:55,711 INFO L85 PathProgramCache]: Analyzing trace with hash 589677296, now seen corresponding path program 1 times [2022-03-20 09:08:55,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:55,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586484236] [2022-03-20 09:08:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:55,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:08:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:55,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:08:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:55,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 09:08:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:08:55,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:55,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586484236] [2022-03-20 09:08:55,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586484236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:08:55,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:08:55,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:08:55,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608336404] [2022-03-20 09:08:55,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:08:55,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:08:55,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:08:55,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:08:55,951 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2022-03-20 09:08:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:56,008 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2022-03-20 09:08:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:08:56,010 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 [2022-03-20 09:08:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:56,015 INFO L225 Difference]: With dead ends: 61 [2022-03-20 09:08:56,015 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 09:08:56,028 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 [2022-03-20 09:08:56,031 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:56,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:08:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 09:08:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 09:08:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 09:08:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-03-20 09:08:56,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 22 [2022-03-20 09:08:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:56,055 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-03-20 09:08:56,056 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) [2022-03-20 09:08:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-03-20 09:08:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 09:08:56,058 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:56,059 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:56,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:08:56,060 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1721458959, now seen corresponding path program 1 times [2022-03-20 09:08:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:56,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228910398] [2022-03-20 09:08:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:56,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:56,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:08:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805003350] [2022-03-20 09:08:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:56,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:56,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:56,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:08:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:56,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:08:56,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:08:56,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:08:56,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:56,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228910398] [2022-03-20 09:08:56,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:08:56,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805003350] [2022-03-20 09:08:56,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805003350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:08:56,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:08:56,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:08:56,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73739158] [2022-03-20 09:08:56,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:08:56,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:08:56,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:08:56,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:08:56,226 INFO L87 Difference]: Start difference. First operand 29 states and 37 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) [2022-03-20 09:08:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:56,276 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-03-20 09:08:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:08:56,276 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 [2022-03-20 09:08:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:56,277 INFO L225 Difference]: With dead ends: 45 [2022-03-20 09:08:56,277 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 09:08:56,277 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 [2022-03-20 09:08:56,278 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:56,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:08:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 09:08:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-20 09:08:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 09:08:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2022-03-20 09:08:56,287 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 22 [2022-03-20 09:08:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:56,287 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2022-03-20 09:08:56,287 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) [2022-03-20 09:08:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2022-03-20 09:08:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 09:08:56,288 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:56,288 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:56,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 09:08:56,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:56,496 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash 491128363, now seen corresponding path program 1 times [2022-03-20 09:08:56,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:56,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394904888] [2022-03-20 09:08:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:56,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:56,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:08:56,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965759295] [2022-03-20 09:08:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:56,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:56,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:56,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:56,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:08:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 09:08:56,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 09:08:56,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:08:56,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:56,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394904888] [2022-03-20 09:08:56,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:08:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965759295] [2022-03-20 09:08:56,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965759295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:08:56,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:08:56,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 09:08:56,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998861196] [2022-03-20 09:08:56,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:08:56,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:08:56,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:08:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:08:56,706 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 09:08:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:56,801 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-03-20 09:08:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 09:08:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 09:08:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:56,803 INFO L225 Difference]: With dead ends: 49 [2022-03-20 09:08:56,803 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 09:08:56,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:08:56,804 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:56,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 177 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:08:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 09:08:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 09:08:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 09:08:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-03-20 09:08:56,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 27 [2022-03-20 09:08:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:56,812 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-03-20 09:08:56,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 09:08:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-03-20 09:08:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:08:56,813 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:56,813 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:56,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 09:08:57,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 09:08:57,029 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:57,030 INFO L85 PathProgramCache]: Analyzing trace with hash 70646830, now seen corresponding path program 1 times [2022-03-20 09:08:57,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:57,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711858631] [2022-03-20 09:08:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:57,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:57,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:08:57,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65708016] [2022-03-20 09:08:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:57,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:57,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:57,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:08:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:57,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 09:08:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 09:08:57,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 09:08:57,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:57,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711858631] [2022-03-20 09:08:57,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:08:57,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65708016] [2022-03-20 09:08:57,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65708016] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 09:08:57,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:08:57,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 09:08:57,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555167735] [2022-03-20 09:08:57,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:08:57,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:08:57,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:57,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:08:57,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:08:57,391 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:08:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:57,442 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2022-03-20 09:08:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:08:57,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 09:08:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:57,447 INFO L225 Difference]: With dead ends: 71 [2022-03-20 09:08:57,448 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 09:08:57,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:08:57,451 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:57,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:08:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 09:08:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 09:08:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 09:08:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-03-20 09:08:57,475 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 32 [2022-03-20 09:08:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:57,476 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-03-20 09:08:57,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:08:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-03-20 09:08:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 09:08:57,476 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:57,477 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:57,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:57,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:57,693 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash 399873803, now seen corresponding path program 1 times [2022-03-20 09:08:57,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:57,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804054071] [2022-03-20 09:08:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:57,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:57,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:08:57,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27302620] [2022-03-20 09:08:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:57,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:57,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:57,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:57,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:08:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 09:08:57,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 09:08:57,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:08:57,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804054071] [2022-03-20 09:08:57,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:08:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27302620] [2022-03-20 09:08:57,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27302620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:08:57,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:08:57,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:08:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569167727] [2022-03-20 09:08:57,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:08:57,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:08:57,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:08:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:08:57,823 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 09:08:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:57,863 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-03-20 09:08:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:08:57,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-03-20 09:08:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:57,867 INFO L225 Difference]: With dead ends: 73 [2022-03-20 09:08:57,867 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 09:08:57,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:08:57,868 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:57,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:08:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 09:08:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 09:08:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 28 states have call successors, (28), 8 states have call predecessors, (28), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 09:08:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-03-20 09:08:57,881 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 38 [2022-03-20 09:08:57,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:57,882 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-03-20 09:08:57,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 09:08:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-03-20 09:08:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 09:08:57,883 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:57,883 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:57,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:58,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:58,084 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -927531751, now seen corresponding path program 1 times [2022-03-20 09:08:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398919015] [2022-03-20 09:08:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:58,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:08:58,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981270195] [2022-03-20 09:08:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:58,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:58,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:58,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:58,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:08:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 09:08:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 09:08:58,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:08:58,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398919015] [2022-03-20 09:08:58,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:08:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981270195] [2022-03-20 09:08:58,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981270195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:08:58,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:08:58,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:08:58,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805038173] [2022-03-20 09:08:58,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:08:58,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:08:58,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:08:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:08:58,243 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 09:08:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:58,286 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2022-03-20 09:08:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:08:58,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-03-20 09:08:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:58,289 INFO L225 Difference]: With dead ends: 81 [2022-03-20 09:08:58,289 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 09:08:58,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:08:58,290 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:58,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:08:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 09:08:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-20 09:08:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 09:08:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-03-20 09:08:58,310 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 40 [2022-03-20 09:08:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:58,310 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-03-20 09:08:58,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 09:08:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-03-20 09:08:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 09:08:58,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:58,314 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:58,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:08:58,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:58,521 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2093519850, now seen corresponding path program 1 times [2022-03-20 09:08:58,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:58,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389505115] [2022-03-20 09:08:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:58,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:58,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:08:58,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602738678] [2022-03-20 09:08:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:58,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:58,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:58,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:58,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:08:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:08:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 09:08:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 09:08:58,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 09:08:58,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:58,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389505115] [2022-03-20 09:08:58,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:08:58,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602738678] [2022-03-20 09:08:58,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602738678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:58,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:08:58,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 09:08:58,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014324226] [2022-03-20 09:08:58,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:58,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 09:08:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 09:08:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:08:58,850 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 09:08:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:58,943 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-03-20 09:08:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 09:08:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2022-03-20 09:08:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:58,945 INFO L225 Difference]: With dead ends: 85 [2022-03-20 09:08:58,945 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 09:08:58,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:08:58,948 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:58,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 145 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:08:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 09:08:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-20 09:08:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 09:08:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2022-03-20 09:08:58,969 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 43 [2022-03-20 09:08:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:58,969 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2022-03-20 09:08:58,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 09:08:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2022-03-20 09:08:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 09:08:58,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:58,970 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:58,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 09:08:59,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:59,187 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:08:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:08:59,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1560297731, now seen corresponding path program 2 times [2022-03-20 09:08:59,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:08:59,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105004494] [2022-03-20 09:08:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:08:59,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:59,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:08:59,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741300534] [2022-03-20 09:08:59,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:08:59,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:08:59,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:08:59,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:08:59,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:08:59,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:08:59,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:08:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 09:08:59,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:08:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 09:08:59,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:08:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 09:08:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:08:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105004494] [2022-03-20 09:08:59,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:08:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741300534] [2022-03-20 09:08:59,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741300534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:08:59,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:08:59,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 09:08:59,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744790600] [2022-03-20 09:08:59,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:08:59,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:08:59,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:08:59,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:08:59,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:08:59,501 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 09:08:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:08:59,840 INFO L93 Difference]: Finished difference Result 107 states and 136 transitions. [2022-03-20 09:08:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:08:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 45 [2022-03-20 09:08:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:08:59,842 INFO L225 Difference]: With dead ends: 107 [2022-03-20 09:08:59,842 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 09:08:59,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:08:59,843 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:08:59,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 209 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:08:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 09:08:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2022-03-20 09:08:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 09:08:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-03-20 09:08:59,851 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 45 [2022-03-20 09:08:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:08:59,851 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-03-20 09:08:59,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 09:08:59,852 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-03-20 09:08:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 09:08:59,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:08:59,852 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:08:59,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:00,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:00,072 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1002568160, now seen corresponding path program 1 times [2022-03-20 09:09:00,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:00,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221258266] [2022-03-20 09:09:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:00,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:00,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068651215] [2022-03-20 09:09:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:00,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:00,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:00,096 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:00,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 09:09:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 09:09:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 09:09:00,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 09:09:00,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:00,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221258266] [2022-03-20 09:09:00,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:00,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068651215] [2022-03-20 09:09:00,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068651215] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:00,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:09:00,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 09:09:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305602249] [2022-03-20 09:09:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:09:00,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:09:00,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:00,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:09:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:09:00,412 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 09:09:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:00,438 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-03-20 09:09:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:09:00,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2022-03-20 09:09:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:00,439 INFO L225 Difference]: With dead ends: 85 [2022-03-20 09:09:00,439 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 09:09:00,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:09:00,440 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:00,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 98 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:09:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 09:09:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 09:09:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 09:09:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 09:09:00,441 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-03-20 09:09:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:00,441 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 09:09:00,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 09:09:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 09:09:00,441 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 09:09:00,443 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 09:09:00,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 09:09:00,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 09:09:00,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 09:09:09,694 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 09:09:09,694 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:09:09,694 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:09:09,694 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 09:09:09,694 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 09:09:09,694 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:09:09,694 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:09:09,694 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-03-20 09:09:09,694 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-03-20 09:09:09,694 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-03-20 09:09:09,694 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-03-20 09:09:09,695 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 57) the Hoare annotation is: true [2022-03-20 09:09:09,695 INFO L885 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: true [2022-03-20 09:09:09,695 INFO L885 garLoopResultBuilder]: At program point L23-1(line 23) the Hoare annotation is: true [2022-03-20 09:09:09,695 INFO L882 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2022-03-20 09:09:09,695 INFO L878 garLoopResultBuilder]: At program point L41-2(lines 33 50) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~a~0 (+ .cse0 .cse1)) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))) [2022-03-20 09:09:09,695 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 50) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (let ((.cse2 (+ .cse0 .cse1))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~b~0 .cse2) (= main_~a~0 .cse2) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))))) [2022-03-20 09:09:09,695 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~a~0 (+ .cse0 .cse1)) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))) [2022-03-20 09:09:09,695 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (let ((.cse2 (+ .cse0 .cse1))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~b~0 .cse2) (= main_~a~0 .cse2) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))))) [2022-03-20 09:09:09,695 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~a~0 (+ .cse0 .cse1)) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))) [2022-03-20 09:09:09,695 INFO L878 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse4 (* main_~q~0 main_~x~0)) (.cse5 (* main_~y~0 main_~s~0))) (let ((.cse0 (= main_~b~0 (+ .cse4 .cse5))) (.cse1 (= main_~s~0 1)) (.cse3 (= main_~p~0 1)) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~r~0 0) .cse0 .cse1 .cse2 (= main_~a~0 main_~x~0) .cse3) (and (= main_~b~0 main_~a~0) .cse0 .cse1 (= main_~q~0 0) .cse2 .cse3) (let ((.cse6 (* main_~y~0 main_~r~0)) (.cse7 (* main_~p~0 main_~x~0))) (let ((.cse8 (+ .cse6 .cse7))) (and (= (+ .cse4 main_~a~0 .cse5) (+ .cse6 main_~b~0 .cse7)) (= main_~b~0 .cse8) (= main_~a~0 .cse8) .cse2 (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))))))) [2022-03-20 09:09:09,696 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~r~0)) (.cse1 (* main_~p~0 main_~x~0))) (and (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ .cse0 main_~b~0 .cse1)) (= main_~a~0 (+ .cse0 .cse1)) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)))) [2022-03-20 09:09:09,696 INFO L878 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~y~0)) [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point L36(lines 33 50) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point L55(line 55) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point L41(lines 41 49) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 57) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 57) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-03-20 09:09:09,696 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-03-20 09:09:09,699 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:09,700 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 09:09:09,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:09:09 BasicIcfg [2022-03-20 09:09:09,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 09:09:09,715 INFO L158 Benchmark]: Toolchain (without parser) took 14487.61ms. Allocated memory was 174.1MB in the beginning and 215.0MB in the end (delta: 40.9MB). Free memory was 145.5MB in the beginning and 169.4MB in the end (delta: -23.9MB). Peak memory consumption was 118.4MB. Max. memory is 8.0GB. [2022-03-20 09:09:09,715 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 174.1MB. Free memory is still 130.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:09:09,715 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.21ms. Allocated memory was 174.1MB in the beginning and 215.0MB in the end (delta: 40.9MB). Free memory was 145.3MB in the beginning and 186.3MB in the end (delta: -41.0MB). Peak memory consumption was 6.9MB. Max. memory is 8.0GB. [2022-03-20 09:09:09,716 INFO L158 Benchmark]: Boogie Preprocessor took 26.63ms. Allocated memory is still 215.0MB. Free memory was 186.3MB in the beginning and 184.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:09:09,716 INFO L158 Benchmark]: RCFGBuilder took 177.10ms. Allocated memory is still 215.0MB. Free memory was 184.9MB in the beginning and 173.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 09:09:09,716 INFO L158 Benchmark]: IcfgTransformer took 14.12ms. Allocated memory is still 215.0MB. Free memory was 173.9MB in the beginning and 172.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 09:09:09,722 INFO L158 Benchmark]: TraceAbstraction took 14064.32ms. Allocated memory is still 215.0MB. Free memory was 171.8MB in the beginning and 169.4MB in the end (delta: 2.4MB). Peak memory consumption was 103.2MB. Max. memory is 8.0GB. [2022-03-20 09:09:09,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 174.1MB. Free memory is still 130.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.21ms. Allocated memory was 174.1MB in the beginning and 215.0MB in the end (delta: 40.9MB). Free memory was 145.3MB in the beginning and 186.3MB in the end (delta: -41.0MB). Peak memory consumption was 6.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.63ms. Allocated memory is still 215.0MB. Free memory was 186.3MB in the beginning and 184.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 177.10ms. Allocated memory is still 215.0MB. Free memory was 184.9MB in the beginning and 173.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.12ms. Allocated memory is still 215.0MB. Free memory was 173.9MB in the beginning and 172.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 14064.32ms. Allocated memory is still 215.0MB. Free memory was 171.8MB in the beginning and 169.4MB in the end (delta: 2.4MB). Peak memory consumption was 103.2MB. 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: 13]: 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, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.0s, OverallIterations: 9, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 9.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 133 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 95 mSDsluCounter, 1201 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 890 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 432 IncrementalHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 311 mSDtfsCounter, 432 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 498 GetRequests, 436 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=8, InterpolantAutomatonStates: 51, 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, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 51 PreInvPairs, 84 NumberOfFragments, 378 HoareAnnotationTreeSize, 51 FomulaSimplifications, 136 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 16 FomulaSimplificationsInter, 1838 FormulaSimplificationTreeSizeReductionInter, 9.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 327 NumberOfCodeBlocks, 327 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 492 ConstructedInterpolants, 0 QuantifiedInterpolants, 1506 SizeOfPredicates, 16 NumberOfNonLiveVariables, 943 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 373/406 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: 33]: Loop Invariant Derived loop invariant: ((q * x + a + y * s == y * r + b + p * x && a == y * r + p * x) && 1 <= y) && p * s == q * r + 1 RESULT: Ultimate proved your program to be correct! [2022-03-20 09:09:09,736 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...