/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/ps5-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 20:47:20,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 20:47:20,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 20:47:20,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 20:47:20,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 20:47:20,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 20:47:20,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 20:47:20,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 20:47:20,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 20:47:20,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 20:47:20,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 20:47:20,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 20:47:20,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 20:47:20,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 20:47:20,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 20:47:20,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 20:47:20,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 20:47:20,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 20:47:20,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 20:47:20,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 20:47:20,040 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 20:47:20,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 20:47:20,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 20:47:20,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 20:47:20,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 20:47:20,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 20:47:20,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 20:47:20,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 20:47:20,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 20:47:20,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 20:47:20,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 20:47:20,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 20:47:20,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 20:47:20,058 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 20:47:20,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 20:47:20,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 20:47:20,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 20:47:20,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 20:47:20,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 20:47:20,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 20:47:20,059 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 20:47:20,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 20:47:20,059 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 20:47:20,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 20:47:20,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 20:47:20,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 20:47:20,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 20:47:20,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 20:47:20,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:47:20,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 20:47:20,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 20:47:20,061 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 20:47:20,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 20:47:20,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 20:47:20,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 20:47:20,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 20:47:20,244 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 20:47:20,245 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 20:47:20,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound5.c [2022-03-18 20:47:20,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c119df95/6beba7e0ab954e7e810a3f56921c8aaa/FLAG50fe55400 [2022-03-18 20:47:20,622 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 20:47:20,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound5.c [2022-03-18 20:47:20,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c119df95/6beba7e0ab954e7e810a3f56921c8aaa/FLAG50fe55400 [2022-03-18 20:47:21,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c119df95/6beba7e0ab954e7e810a3f56921c8aaa [2022-03-18 20:47:21,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 20:47:21,064 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 20:47:21,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 20:47:21,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 20:47:21,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 20:47:21,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b4ae561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21, skipping insertion in model container [2022-03-18 20:47:21,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 20:47:21,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 20:47:21,191 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/ps5-ll_valuebound5.c[458,471] [2022-03-18 20:47:21,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:47:21,233 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 20:47:21,241 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/ps5-ll_valuebound5.c[458,471] [2022-03-18 20:47:21,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:47:21,261 INFO L208 MainTranslator]: Completed translation [2022-03-18 20:47:21,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21 WrapperNode [2022-03-18 20:47:21,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 20:47:21,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 20:47:21,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 20:47:21,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 20:47:21,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 20:47:21,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 20:47:21,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 20:47:21,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 20:47:21,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:47:21,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:21,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 20:47:21,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 20:47:21,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 20:47:21,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 20:47:21,342 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 20:47:21,343 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 20:47:21,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 20:47:21,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 20:47:21,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 20:47:21,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 20:47:21,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 20:47:21,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 20:47:21,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 20:47:21,396 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 20:47:21,397 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 20:47:21,464 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 20:47:21,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 20:47:21,468 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 20:47:21,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:47:21 BoogieIcfgContainer [2022-03-18 20:47:21,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 20:47:21,470 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 20:47:21,470 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 20:47:21,470 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 20:47:21,472 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:47:21" (1/1) ... [2022-03-18 20:47:21,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:47:21 BasicIcfg [2022-03-18 20:47:21,483 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 20:47:21,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 20:47:21,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 20:47:21,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 20:47:21,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 08:47:21" (1/4) ... [2022-03-18 20:47:21,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d6f94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:47:21, skipping insertion in model container [2022-03-18 20:47:21,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:47:21" (2/4) ... [2022-03-18 20:47:21,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d6f94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:47:21, skipping insertion in model container [2022-03-18 20:47:21,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:47:21" (3/4) ... [2022-03-18 20:47:21,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d6f94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:47:21, skipping insertion in model container [2022-03-18 20:47:21,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:47:21" (4/4) ... [2022-03-18 20:47:21,488 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound5.cJordan [2022-03-18 20:47:21,491 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 20:47:21,491 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 20:47:21,515 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 20:47:21,520 INFO L340 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 [2022-03-18 20:47:21,520 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 20:47:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 20:47:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 20:47:21,532 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:21,532 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:21,532 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-03-18 20:47:21,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:21,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146518020] [2022-03-18 20:47:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:47:21,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 20:47:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:47:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 20:47:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:47:21,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 20:47:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:47:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:47:21,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:21,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146518020] [2022-03-18 20:47:21,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146518020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:47:21,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:47:21,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 20:47:21,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662268492] [2022-03-18 20:47:21,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:47:21,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 20:47:21,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:21,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 20:47:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:47:21,732 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 20:47:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:21,793 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-18 20:47:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 20:47:21,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 20:47:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:21,803 INFO L225 Difference]: With dead ends: 29 [2022-03-18 20:47:21,803 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 20:47:21,804 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:47:21,806 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:21,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:47:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 20:47:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-18 20:47:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 20:47:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-18 20:47:21,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-18 20:47:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:21,831 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-18 20:47:21,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 20:47:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-18 20:47:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 20:47:21,842 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:21,842 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:21,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 20:47:21,843 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-03-18 20:47:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:21,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825375002] [2022-03-18 20:47:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:21,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:47:21,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164450002] [2022-03-18 20:47:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:21,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:21,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:21,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:47:21,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 20:47:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:47:21,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 20:47:21,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:47:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:47:22,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:47:22,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:22,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825375002] [2022-03-18 20:47:22,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:47:22,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164450002] [2022-03-18 20:47:22,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164450002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:47:22,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:47:22,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 20:47:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682375221] [2022-03-18 20:47:22,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:47:22,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:47:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:47:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 20:47:22,095 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 20:47:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:22,136 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-03-18 20:47:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:47:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-18 20:47:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:22,138 INFO L225 Difference]: With dead ends: 33 [2022-03-18 20:47:22,138 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 20:47:22,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 20:47:22,139 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:22,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:47:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 20:47:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 20:47:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 20:47:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-18 20:47:22,152 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-03-18 20:47:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:22,152 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-18 20:47:22,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 20:47:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-18 20:47:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 20:47:22,153 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:22,153 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:22,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 20:47:22,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:22,368 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:22,368 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-03-18 20:47:22,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:22,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186956700] [2022-03-18 20:47:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:22,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:22,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:47:22,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119961491] [2022-03-18 20:47:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:22,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:22,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:22,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:47:22,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 20:47:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:47:22,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 20:47:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:47:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:47:22,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:47:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 20:47:22,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:22,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186956700] [2022-03-18 20:47:22,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:47:22,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119961491] [2022-03-18 20:47:22,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119961491] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 20:47:22,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:47:22,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 20:47:22,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083049183] [2022-03-18 20:47:22,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:47:22,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:47:22,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:47:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 20:47:22,666 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 20:47:24,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:47:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:24,793 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-03-18 20:47:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:47:24,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-18 20:47:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:24,794 INFO L225 Difference]: With dead ends: 35 [2022-03-18 20:47:24,794 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 20:47:24,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 20:47:24,795 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:24,796 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 20:47:24,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 20:47:24,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 20:47:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 20:47:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-18 20:47:24,810 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-18 20:47:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:24,811 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-18 20:47:24,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 20:47:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-18 20:47:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 20:47:24,814 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:24,814 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:24,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 20:47:25,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 20:47:25,015 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-03-18 20:47:25,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:25,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764483030] [2022-03-18 20:47:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:25,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:25,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:47:25,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618387223] [2022-03-18 20:47:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:25,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:25,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:25,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:47:25,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 20:47:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:47:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 20:47:25,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:47:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 20:47:25,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:47:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764483030] [2022-03-18 20:47:25,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:47:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618387223] [2022-03-18 20:47:25,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618387223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:47:25,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:47:25,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 20:47:25,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058418554] [2022-03-18 20:47:25,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:47:25,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 20:47:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 20:47:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 20:47:25,478 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 20:47:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:25,526 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-18 20:47:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 20:47:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-03-18 20:47:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:25,527 INFO L225 Difference]: With dead ends: 40 [2022-03-18 20:47:25,527 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 20:47:25,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:47:25,528 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:25,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:47:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 20:47:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-18 20:47:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 20:47:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-18 20:47:25,532 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-03-18 20:47:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:25,533 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-18 20:47:25,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 20:47:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-18 20:47:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 20:47:25,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:25,534 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:25,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 20:47:25,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:25,750 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-03-18 20:47:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:25,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807765893] [2022-03-18 20:47:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:25,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:47:25,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800941265] [2022-03-18 20:47:25,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:47:25,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:25,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:25,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:47:25,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 20:47:25,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:47:25,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:47:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 20:47:25,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:47:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 20:47:26,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:47:26,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807765893] [2022-03-18 20:47:26,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:47:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800941265] [2022-03-18 20:47:26,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800941265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:47:26,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:47:26,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-18 20:47:26,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828244824] [2022-03-18 20:47:26,253 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:47:26,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 20:47:26,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:26,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 20:47:26,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:47:26,253 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 20:47:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:26,313 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-18 20:47:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 20:47:26,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-03-18 20:47:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:26,314 INFO L225 Difference]: With dead ends: 43 [2022-03-18 20:47:26,314 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 20:47:26,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:47:26,315 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:26,315 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:47:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 20:47:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-18 20:47:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 20:47:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-03-18 20:47:26,319 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-03-18 20:47:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:26,319 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-03-18 20:47:26,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 20:47:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-03-18 20:47:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 20:47:26,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:26,320 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:26,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 20:47:26,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:26,521 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-03-18 20:47:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:26,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364337000] [2022-03-18 20:47:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:26,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:47:26,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934489511] [2022-03-18 20:47:26,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:47:26,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:26,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:26,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:47:26,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 20:47:26,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 20:47:26,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:47:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 20:47:26,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:47:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 20:47:26,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:47:26,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364337000] [2022-03-18 20:47:26,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:47:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934489511] [2022-03-18 20:47:26,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934489511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:47:26,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:47:26,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 20:47:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205485511] [2022-03-18 20:47:26,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:47:26,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 20:47:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:26,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 20:47:26,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:47:26,997 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 20:47:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:27,069 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-03-18 20:47:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 20:47:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-03-18 20:47:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:27,070 INFO L225 Difference]: With dead ends: 46 [2022-03-18 20:47:27,071 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 20:47:27,071 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:47:27,071 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:27,072 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:47:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 20:47:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-18 20:47:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 20:47:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-18 20:47:27,075 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-03-18 20:47:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:27,075 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-18 20:47:27,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 20:47:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-18 20:47:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 20:47:27,076 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:27,076 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:27,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 20:47:27,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:27,290 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2022-03-18 20:47:27,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:27,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257371655] [2022-03-18 20:47:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:27,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:27,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:47:27,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367518715] [2022-03-18 20:47:27,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:47:27,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:27,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:27,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:47:27,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 20:47:27,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:47:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:47:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 20:47:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:47:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 20:47:27,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:47:27,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257371655] [2022-03-18 20:47:27,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:47:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367518715] [2022-03-18 20:47:27,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367518715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:47:27,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:47:27,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 20:47:27,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086954260] [2022-03-18 20:47:27,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:47:27,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 20:47:27,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:27,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 20:47:27,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-18 20:47:27,639 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-18 20:47:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:27,726 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-03-18 20:47:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 20:47:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-03-18 20:47:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:27,727 INFO L225 Difference]: With dead ends: 49 [2022-03-18 20:47:27,727 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 20:47:27,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-18 20:47:27,728 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:27,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:47:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 20:47:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-18 20:47:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 20:47:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-18 20:47:27,732 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-03-18 20:47:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:27,732 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-18 20:47:27,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-18 20:47:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-18 20:47:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 20:47:27,733 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:27,733 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:27,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 20:47:27,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:27,943 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2022-03-18 20:47:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:27,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701846754] [2022-03-18 20:47:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:27,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:27,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:47:27,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624763766] [2022-03-18 20:47:27,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:47:27,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:27,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:27,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:47:27,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 20:47:42,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 20:47:42,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:47:42,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 20:47:42,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:47:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 20:47:42,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:47:42,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:42,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701846754] [2022-03-18 20:47:42,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:47:42,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624763766] [2022-03-18 20:47:42,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624763766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:47:42,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:47:42,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 20:47:42,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636615264] [2022-03-18 20:47:42,981 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:47:42,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 20:47:42,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:42,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 20:47:42,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:47:42,983 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-18 20:47:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:43,106 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-18 20:47:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 20:47:43,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-03-18 20:47:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:43,108 INFO L225 Difference]: With dead ends: 52 [2022-03-18 20:47:43,108 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 20:47:43,108 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-18 20:47:43,109 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:43,109 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:47:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 20:47:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-18 20:47:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 20:47:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-18 20:47:43,115 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-03-18 20:47:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:43,115 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-18 20:47:43,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-18 20:47:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-18 20:47:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 20:47:43,116 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:47:43,116 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:47:43,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 20:47:43,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:43,317 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:47:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:47:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2022-03-18 20:47:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:47:43,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128793406] [2022-03-18 20:47:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:47:43,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:47:43,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:47:43,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164731370] [2022-03-18 20:47:43,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 20:47:43,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:47:43,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:47:43,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:47:43,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 20:47:45,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 20:47:45,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:47:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 20:47:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:47:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 123 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 20:47:45,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:47:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-18 20:47:45,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:47:45,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128793406] [2022-03-18 20:47:45,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:47:45,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164731370] [2022-03-18 20:47:45,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164731370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:47:45,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:47:45,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-18 20:47:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416130280] [2022-03-18 20:47:45,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:47:45,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 20:47:45,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:47:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 20:47:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-03-18 20:47:45,486 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-03-18 20:47:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:47:45,535 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-03-18 20:47:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 20:47:45,535 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) Word has length 75 [2022-03-18 20:47:45,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:47:45,536 INFO L225 Difference]: With dead ends: 41 [2022-03-18 20:47:45,536 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 20:47:45,537 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-18 20:47:45,538 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:47:45,539 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 158 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:47:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 20:47:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 20:47:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 20:47:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 20:47:45,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2022-03-18 20:47:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:47:45,540 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 20:47:45,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-03-18 20:47:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 20:47:45,540 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 20:47:45,542 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 20:47:45,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 20:47:45,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 20:47:45,751 INFO L718 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2022-03-18 20:47:45,752 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 20:47:45,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:47:45 BasicIcfg [2022-03-18 20:47:45,754 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 20:47:45,755 INFO L158 Benchmark]: Toolchain (without parser) took 24690.77ms. Allocated memory was 255.9MB in the beginning and 330.3MB in the end (delta: 74.4MB). Free memory was 203.4MB in the beginning and 279.4MB in the end (delta: -76.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 20:47:45,755 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 219.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 20:47:45,755 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.08ms. Allocated memory is still 255.9MB. Free memory was 203.3MB in the beginning and 230.1MB in the end (delta: -26.8MB). Peak memory consumption was 6.6MB. Max. memory is 8.0GB. [2022-03-18 20:47:45,755 INFO L158 Benchmark]: Boogie Preprocessor took 26.62ms. Allocated memory is still 255.9MB. Free memory was 230.1MB in the beginning and 228.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 20:47:45,755 INFO L158 Benchmark]: RCFGBuilder took 178.70ms. Allocated memory is still 255.9MB. Free memory was 228.6MB in the beginning and 218.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 20:47:45,756 INFO L158 Benchmark]: IcfgTransformer took 13.85ms. Allocated memory is still 255.9MB. Free memory was 218.1MB in the beginning and 217.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 20:47:45,756 INFO L158 Benchmark]: TraceAbstraction took 24270.01ms. Allocated memory was 255.9MB in the beginning and 330.3MB in the end (delta: 74.4MB). Free memory was 216.5MB in the beginning and 279.4MB in the end (delta: -62.9MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-03-18 20:47:45,757 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 255.9MB. Free memory is still 219.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.08ms. Allocated memory is still 255.9MB. Free memory was 203.3MB in the beginning and 230.1MB in the end (delta: -26.8MB). Peak memory consumption was 6.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.62ms. Allocated memory is still 255.9MB. Free memory was 230.1MB in the beginning and 228.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 178.70ms. Allocated memory is still 255.9MB. Free memory was 228.6MB in the beginning and 218.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.85ms. Allocated memory is still 255.9MB. Free memory was 218.1MB in the beginning and 217.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 24270.01ms. Allocated memory was 255.9MB in the beginning and 330.3MB in the end (delta: 74.4MB). Free memory was 216.5MB in the beginning and 279.4MB in the end (delta: -62.9MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.2s, OverallIterations: 9, TraceHistogramMax: 9, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 1575 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1290 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 536 IncrementalHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 285 mSDtfsCounter, 536 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 612 GetRequests, 515 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=8, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 16.8s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 418 NumberOfCodeBlocks, 409 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 511 ConstructedInterpolants, 0 QuantifiedInterpolants, 1590 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1049 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 696/809 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-18 20:47:45,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...