/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:07:05,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:07:05,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:07:05,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:07:05,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:07:05,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:07:05,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:07:05,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:07:05,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:07:05,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:07:05,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:07:05,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:07:05,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:07:05,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:07:05,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:07:05,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:07:05,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:07:05,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:07:05,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:07:05,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:07:05,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:07:05,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:07:05,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:07:05,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:07:05,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 22:07:05,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 22:07:05,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 22:07:05,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 22:07:05,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 22:07:05,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 22:07:05,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 22:07:05,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 22:07:05,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 22:07:05,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:07:05,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:07:05,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:07:05,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:07:05,156 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:07:05,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:07:05,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:07:05,158 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:07:05,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:07:05,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:07:05,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:07:05,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:07:05,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:07:05,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:07:05,160 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:07:05,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:07:05,160 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:07:05,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:07:05,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:07:05,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:07:05,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:07:05,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:07:05,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:07:05,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:07:05,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:07:05,161 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:07:05,161 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:07:05,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:07:05,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:07:05,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:07:05,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:07:05,339 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:07:05,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2022-02-14 22:07:05,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a237aaa92/b7b7d64d8de94469a1c5e66f8d593391/FLAG1d212a654 [2022-02-14 22:07:05,771 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:07:05,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2022-02-14 22:07:05,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a237aaa92/b7b7d64d8de94469a1c5e66f8d593391/FLAG1d212a654 [2022-02-14 22:07:06,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a237aaa92/b7b7d64d8de94469a1c5e66f8d593391 [2022-02-14 22:07:06,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:07:06,199 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:07:06,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:07:06,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:07:06,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:07:06,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f349fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06, skipping insertion in model container [2022-02-14 22:07:06,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:07:06,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:07:06,316 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c[576,589] [2022-02-14 22:07:06,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:07:06,360 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:07:06,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c[576,589] [2022-02-14 22:07:06,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:07:06,381 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:07:06,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06 WrapperNode [2022-02-14 22:07:06,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:07:06,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:07:06,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:07:06,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:07:06,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:07:06,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:07:06,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:07:06,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:07:06,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:07:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:06,438 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) [2022-02-14 22:07:06,452 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 [2022-02-14 22:07:06,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:07:06,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:07:06,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:07:06,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:07:06,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:07:06,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:07:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:07:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:07:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:07:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:07:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 22:07:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:07:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:07:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:07:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:07:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:07:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:07:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:07:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:07:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:07:06,524 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:07:06,525 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:07:06,616 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:07:06,620 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:07:06,620 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 22:07:06,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:07:06 BoogieIcfgContainer [2022-02-14 22:07:06,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:07:06,622 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:07:06,622 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:07:06,623 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:07:06,625 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:07:06" (1/1) ... [2022-02-14 22:07:06,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:07:06 BasicIcfg [2022-02-14 22:07:06,638 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:07:06,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:07:06,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:07:06,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:07:06,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:07:06" (1/4) ... [2022-02-14 22:07:06,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205d6d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:07:06, skipping insertion in model container [2022-02-14 22:07:06,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:06" (2/4) ... [2022-02-14 22:07:06,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205d6d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:07:06, skipping insertion in model container [2022-02-14 22:07:06,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:07:06" (3/4) ... [2022-02-14 22:07:06,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205d6d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:07:06, skipping insertion in model container [2022-02-14 22:07:06,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:07:06" (4/4) ... [2022-02-14 22:07:06,643 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound1.cJordan [2022-02-14 22:07:06,646 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:07:06,646 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:07:06,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:07:06,676 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 22:07:06,677 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:07:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 22:07:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 22:07:06,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:06,692 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:06,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times [2022-02-14 22:07:06,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:06,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241324862] [2022-02-14 22:07:06,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:06,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:06,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:07:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:06,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:07:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:06,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 22:07:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:06,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 22:07:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:07:06,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:06,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241324862] [2022-02-14 22:07:06,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241324862] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:06,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:06,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:07:06,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824097318] [2022-02-14 22:07:06,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:06,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:07:06,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:07:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:07:06,877 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 22:07:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:06,972 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-02-14 22:07:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:07:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-02-14 22:07:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:06,979 INFO L225 Difference]: With dead ends: 39 [2022-02-14 22:07:06,979 INFO L226 Difference]: Without dead ends: 34 [2022-02-14 22:07:06,980 INFO L932 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 [2022-02-14 22:07:06,983 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:06,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:07:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-14 22:07:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-14 22:07:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 22:07:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-02-14 22:07:07,011 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-02-14 22:07:07,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:07,025 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-02-14 22:07:07,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 22:07:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-02-14 22:07:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 22:07:07,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:07,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:07,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:07:07,027 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:07,028 INFO L85 PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times [2022-02-14 22:07:07,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:07,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001168734] [2022-02-14 22:07:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:07,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:07,071 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:07,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927264583] [2022-02-14 22:07:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:07,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:07,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:07,074 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) [2022-02-14 22:07:07,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:07:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 22:07:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-14 22:07:07,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:07:07,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:07,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001168734] [2022-02-14 22:07:07,277 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:07,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927264583] [2022-02-14 22:07:07,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927264583] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:07,278 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:07,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 22:07:07,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558886043] [2022-02-14 22:07:07,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:07,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:07:07,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:07:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:07:07,280 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 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) [2022-02-14 22:07:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:07,354 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-02-14 22:07:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:07:07,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 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 28 [2022-02-14 22:07:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:07,355 INFO L225 Difference]: With dead ends: 43 [2022-02-14 22:07:07,355 INFO L226 Difference]: Without dead ends: 43 [2022-02-14 22:07:07,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:07:07,357 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:07,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 205 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:07:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-14 22:07:07,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-02-14 22:07:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 22:07:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-02-14 22:07:07,376 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2022-02-14 22:07:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:07,377 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-02-14 22:07:07,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 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) [2022-02-14 22:07:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-02-14 22:07:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 22:07:07,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:07,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:07,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 22:07:07,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:07,598 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:07,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times [2022-02-14 22:07:07,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:07,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34040708] [2022-02-14 22:07:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:07,612 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:07,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729050741] [2022-02-14 22:07:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:07,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:07,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:07,628 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) [2022-02-14 22:07:07,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:07:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:07,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 22:07:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-14 22:07:07,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:07:07,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:07,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34040708] [2022-02-14 22:07:07,784 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:07,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729050741] [2022-02-14 22:07:07,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729050741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:07,784 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:07,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 22:07:07,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204092133] [2022-02-14 22:07:07,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:07,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:07:07,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:07,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:07:07,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:07:07,786 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 22:07:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:07,873 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-02-14 22:07:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:07:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2022-02-14 22:07:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:07,875 INFO L225 Difference]: With dead ends: 55 [2022-02-14 22:07:07,875 INFO L226 Difference]: Without dead ends: 54 [2022-02-14 22:07:07,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:07:07,876 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:07,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 198 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:07:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-14 22:07:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-02-14 22:07:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:07:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-02-14 22:07:07,881 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2022-02-14 22:07:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:07,881 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-02-14 22:07:07,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 22:07:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-02-14 22:07:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-14 22:07:07,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:07,882 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-02-14 22:07:07,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 22:07:08,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 22:07:08,099 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:08,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:08,099 INFO L85 PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times [2022-02-14 22:07:08,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:08,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739953788] [2022-02-14 22:07:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:08,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:08,111 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:08,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181343566] [2022-02-14 22:07:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:08,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:08,112 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) [2022-02-14 22:07:08,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 22:07:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 22:07:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-14 22:07:08,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:07:08,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:08,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739953788] [2022-02-14 22:07:08,288 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:08,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181343566] [2022-02-14 22:07:08,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181343566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:08,288 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:08,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 22:07:08,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546450689] [2022-02-14 22:07:08,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:08,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:07:08,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:07:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:07:08,289 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 22:07:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:08,377 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2022-02-14 22:07:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:07:08,377 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), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2022-02-14 22:07:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:08,378 INFO L225 Difference]: With dead ends: 77 [2022-02-14 22:07:08,378 INFO L226 Difference]: Without dead ends: 77 [2022-02-14 22:07:08,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:07:08,379 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:08,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 207 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:07:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-14 22:07:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-02-14 22:07:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-14 22:07:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2022-02-14 22:07:08,385 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2022-02-14 22:07:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:08,386 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2022-02-14 22:07:08,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 22:07:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2022-02-14 22:07:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 22:07:08,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:08,387 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:08,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:07:08,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:08,606 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash -574143214, now seen corresponding path program 1 times [2022-02-14 22:07:08,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:08,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752307112] [2022-02-14 22:07:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:08,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:08,615 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:08,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71880488] [2022-02-14 22:07:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:08,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:08,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:08,617 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) [2022-02-14 22:07:08,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 22:07:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:07:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-14 22:07:08,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:07:08,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:08,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752307112] [2022-02-14 22:07:08,771 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:08,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71880488] [2022-02-14 22:07:08,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71880488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:08,772 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:08,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-14 22:07:08,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151850181] [2022-02-14 22:07:08,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:08,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:07:08,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:07:08,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:07:08,773 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:07:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:08,843 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-02-14 22:07:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:07:08,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-02-14 22:07:08,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:08,846 INFO L225 Difference]: With dead ends: 74 [2022-02-14 22:07:08,846 INFO L226 Difference]: Without dead ends: 74 [2022-02-14 22:07:08,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:07:08,846 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:08,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:07:08,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-14 22:07:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-02-14 22:07:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-14 22:07:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2022-02-14 22:07:08,852 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2022-02-14 22:07:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:08,853 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2022-02-14 22:07:08,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:07:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2022-02-14 22:07:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-14 22:07:08,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:08,854 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:08,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:07:09,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:09,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -810208713, now seen corresponding path program 1 times [2022-02-14 22:07:09,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:09,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166826672] [2022-02-14 22:07:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:09,079 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:09,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533742919] [2022-02-14 22:07:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:09,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:09,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:09,081 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) [2022-02-14 22:07:09,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 22:07:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:07:09,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-02-14 22:07:09,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:07:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-02-14 22:07:09,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:09,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166826672] [2022-02-14 22:07:09,496 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:09,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533742919] [2022-02-14 22:07:09,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533742919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:07:09,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:07:09,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-02-14 22:07:09,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385417378] [2022-02-14 22:07:09,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:07:09,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 22:07:09,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 22:07:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-14 22:07:09,498 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2022-02-14 22:07:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:09,563 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-02-14 22:07:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:07:09,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) Word has length 56 [2022-02-14 22:07:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:09,565 INFO L225 Difference]: With dead ends: 57 [2022-02-14 22:07:09,565 INFO L226 Difference]: Without dead ends: 57 [2022-02-14 22:07:09,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-14 22:07:09,566 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:09,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 184 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:07:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-14 22:07:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-02-14 22:07:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.0625) internal successors, (34), 34 states have internal predecessors, (34), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 22:07:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-02-14 22:07:09,569 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 56 [2022-02-14 22:07:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:09,569 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-02-14 22:07:09,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2022-02-14 22:07:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-02-14 22:07:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-14 22:07:09,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:09,570 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:09,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 22:07:09,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:09,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times [2022-02-14 22:07:09,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:09,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729998171] [2022-02-14 22:07:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:09,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:09,793 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:09,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832654106] [2022-02-14 22:07:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:09,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:09,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:09,798 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) [2022-02-14 22:07:09,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 22:07:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:09,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-14 22:07:09,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-14 22:07:10,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:07:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-14 22:07:10,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:10,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729998171] [2022-02-14 22:07:10,425 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:10,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832654106] [2022-02-14 22:07:10,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832654106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:07:10,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:07:10,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-02-14 22:07:10,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972120326] [2022-02-14 22:07:10,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:07:10,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-14 22:07:10,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-14 22:07:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-02-14 22:07:10,426 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-02-14 22:07:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:10,581 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-02-14 22:07:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 22:07:10,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 63 [2022-02-14 22:07:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:10,582 INFO L225 Difference]: With dead ends: 50 [2022-02-14 22:07:10,582 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 22:07:10,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-14 22:07:10,582 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:10,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 227 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:07:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 22:07:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 22:07:10,583 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) [2022-02-14 22:07:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 22:07:10,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2022-02-14 22:07:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:10,583 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 22:07:10,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-02-14 22:07:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 22:07:10,584 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 22:07:10,586 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 22:07:10,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 22:07:10,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:10,804 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:10,805 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 22:07:10,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:07:10 BasicIcfg [2022-02-14 22:07:10,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 22:07:10,807 INFO L158 Benchmark]: Toolchain (without parser) took 4608.17ms. Allocated memory was 167.8MB in the beginning and 231.7MB in the end (delta: 64.0MB). Free memory was 113.1MB in the beginning and 158.5MB in the end (delta: -45.4MB). Peak memory consumption was 17.9MB. Max. memory is 8.0GB. [2022-02-14 22:07:10,807 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 167.8MB. Free memory was 129.8MB in the beginning and 129.6MB in the end (delta: 129.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 22:07:10,807 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.80ms. Allocated memory was 167.8MB in the beginning and 231.7MB in the end (delta: 64.0MB). Free memory was 113.0MB in the beginning and 205.7MB in the end (delta: -92.8MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-02-14 22:07:10,807 INFO L158 Benchmark]: Boogie Preprocessor took 31.94ms. Allocated memory is still 231.7MB. Free memory was 205.7MB in the beginning and 204.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 22:07:10,807 INFO L158 Benchmark]: RCFGBuilder took 205.62ms. Allocated memory is still 231.7MB. Free memory was 204.5MB in the beginning and 192.6MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 22:07:10,808 INFO L158 Benchmark]: IcfgTransformer took 15.96ms. Allocated memory is still 231.7MB. Free memory was 192.6MB in the beginning and 191.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 22:07:10,808 INFO L158 Benchmark]: TraceAbstraction took 4167.47ms. Allocated memory is still 231.7MB. Free memory was 191.1MB in the beginning and 158.5MB in the end (delta: 32.5MB). Peak memory consumption was 33.2MB. Max. memory is 8.0GB. [2022-02-14 22:07:10,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 167.8MB. Free memory was 129.8MB in the beginning and 129.6MB in the end (delta: 129.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 181.80ms. Allocated memory was 167.8MB in the beginning and 231.7MB in the end (delta: 64.0MB). Free memory was 113.0MB in the beginning and 205.7MB in the end (delta: -92.8MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.94ms. Allocated memory is still 231.7MB. Free memory was 205.7MB in the beginning and 204.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 205.62ms. Allocated memory is still 231.7MB. Free memory was 204.5MB in the beginning and 192.6MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 15.96ms. Allocated memory is still 231.7MB. Free memory was 192.6MB in the beginning and 191.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 4167.47ms. Allocated memory is still 231.7MB. Free memory was 191.1MB in the beginning and 158.5MB in the end (delta: 32.5MB). Peak memory consumption was 33.2MB. 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: 17]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.1s, OverallIterations: 7, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 245 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 202 mSDsluCounter, 1259 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1011 mSDsCounter, 138 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 601 IncrementalHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 138 mSolverCounterUnsat, 248 mSDtfsCounter, 601 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 410 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=5, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 298 NumberOfCodeBlocks, 298 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 1398 SizeOfPredicates, 26 NumberOfNonLiveVariables, 745 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 382/400 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 RESULT: Ultimate proved your program to be correct! [2022-02-14 22:07:10,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...