/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/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 04:37:28,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:37:28,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:37:28,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 04:37:28,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 04:37:28,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 04:37:28,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 04:37:28,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 04:37:28,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 04:37:28,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 04:37:28,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 04:37:28,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 04:37:28,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 04:37:28,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 04:37:28,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 04:37:28,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 04:37:28,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 04:37:28,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 04:37:28,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 04:37:28,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 04:37:28,837 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 04:37:28,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 04:37:28,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 04:37:28,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 04:37:28,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 04:37:28,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 04:37:28,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:37:28,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:37:28,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:37:28,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:37:28,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:37:28,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:37:28,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:37:28,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:37:28,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:37:28,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:37:28,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:37:28,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:37:28,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:37:28,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:37:28,878 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:37:28,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:37:28,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:37:28,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:37:28,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:37:28,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:37:28,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:37:28,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:37:28,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:37:28,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:37:28,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:37:28,880 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:37:28,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:37:29,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:37:29,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:37:29,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:37:29,139 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:37:29,139 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:37:29,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-20 04:37:29,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8b6b2a15/8cc49b2dd52a4392986786e057a31946/FLAG833d009db [2022-03-20 04:37:29,590 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:37:29,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-20 04:37:29,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8b6b2a15/8cc49b2dd52a4392986786e057a31946/FLAG833d009db [2022-03-20 04:37:29,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8b6b2a15/8cc49b2dd52a4392986786e057a31946 [2022-03-20 04:37:29,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:37:29,612 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:37:29,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:37:29,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:37:29,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:37:29,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705e7c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29, skipping insertion in model container [2022-03-20 04:37:29,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:37:29,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:37:29,786 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/egcd3-ll.c[490,503] [2022-03-20 04:37:29,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:37:29,807 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:37:29,815 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/egcd3-ll.c[490,503] [2022-03-20 04:37:29,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:37:29,832 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:37:29,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29 WrapperNode [2022-03-20 04:37:29,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:37:29,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:37:29,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:37:29,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:37:29,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:37:29,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:37:29,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:37:29,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:37:29,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (1/1) ... [2022-03-20 04:37:29,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:37:29,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:29,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 04:37:29,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 04:37:29,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:37:29,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:37:29,924 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:37:29,924 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 04:37:29,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 04:37:29,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:37:29,924 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 04:37:29,924 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:37:29,924 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:37:29,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:37:29,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 04:37:29,925 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 04:37:29,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 04:37:29,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:37:29,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:37:29,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:37:29,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:37:29,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:37:29,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:37:29,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:37:29,980 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:37:29,982 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:37:30,130 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:37:30,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:37:30,136 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 04:37:30,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:37:30 BoogieIcfgContainer [2022-03-20 04:37:30,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:37:30,139 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:37:30,139 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:37:30,154 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:37:30,157 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:37:30" (1/1) ... [2022-03-20 04:37:30,159 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:37:30,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:37:30 BasicIcfg [2022-03-20 04:37:30,187 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:37:30,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:37:30,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:37:30,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:37:30,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:37:29" (1/4) ... [2022-03-20 04:37:30,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29317044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:37:30, skipping insertion in model container [2022-03-20 04:37:30,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:37:29" (2/4) ... [2022-03-20 04:37:30,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29317044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:37:30, skipping insertion in model container [2022-03-20 04:37:30,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:37:30" (3/4) ... [2022-03-20 04:37:30,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29317044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:37:30, skipping insertion in model container [2022-03-20 04:37:30,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:37:30" (4/4) ... [2022-03-20 04:37:30,209 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.cJordan [2022-03-20 04:37:30,213 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:37:30,213 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:37:30,281 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:37:30,289 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 [2022-03-20 04:37:30,289 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:37:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 04:37:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 04:37:30,321 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:30,322 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:30,322 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1332561126, now seen corresponding path program 1 times [2022-03-20 04:37:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403368890] [2022-03-20 04:37:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:30,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:37:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:30,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 04:37:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:30,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 04:37:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:37:30,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:30,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403368890] [2022-03-20 04:37:30,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403368890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:37:30,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:37:30,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 04:37:30,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430591442] [2022-03-20 04:37:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:37:30,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 04:37:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:30,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 04:37:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:37:30,598 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:37:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:30,670 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-03-20 04:37:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 04:37:30,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 04:37:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:30,687 INFO L225 Difference]: With dead ends: 37 [2022-03-20 04:37:30,687 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 04:37:30,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:37:30,694 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:30,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:37:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 04:37:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 04:37:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 04:37:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-03-20 04:37:30,734 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2022-03-20 04:37:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:30,734 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-03-20 04:37:30,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:37:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-03-20 04:37:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 04:37:30,737 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:30,738 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:30,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:37:30,738 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1285593101, now seen corresponding path program 1 times [2022-03-20 04:37:30,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:30,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370305228] [2022-03-20 04:37:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:30,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:30,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992520430] [2022-03-20 04:37:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:30,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:30,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:30,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:30,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 04:37:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:30,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:37:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:37:30,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:37:30,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370305228] [2022-03-20 04:37:30,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:30,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992520430] [2022-03-20 04:37:30,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992520430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:37:30,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:37:30,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 04:37:30,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267194652] [2022-03-20 04:37:30,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:37:30,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 04:37:30,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:30,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 04:37:30,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:37:30,998 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 04:37:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:31,083 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2022-03-20 04:37:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 04:37:31,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 04:37:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:31,085 INFO L225 Difference]: With dead ends: 44 [2022-03-20 04:37:31,085 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 04:37:31,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:37:31,086 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:31,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 145 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:37:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 04:37:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-03-20 04:37:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 04:37:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-20 04:37:31,101 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-03-20 04:37:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:31,102 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-20 04:37:31,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 04:37:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-20 04:37:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 04:37:31,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:31,103 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:31,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:31,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:31,331 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1248058574, now seen corresponding path program 1 times [2022-03-20 04:37:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624218217] [2022-03-20 04:37:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:31,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:31,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:31,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471615608] [2022-03-20 04:37:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:31,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:31,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:31,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:31,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 04:37:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:31,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 04:37:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:37:31,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:37:31,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:31,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624218217] [2022-03-20 04:37:31,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:31,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471615608] [2022-03-20 04:37:31,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471615608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:37:31,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:37:31,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 04:37:31,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472273278] [2022-03-20 04:37:31,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:37:31,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:37:31,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:37:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:37:31,589 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 04:37:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:31,658 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-03-20 04:37:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:37:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-20 04:37:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:31,660 INFO L225 Difference]: With dead ends: 48 [2022-03-20 04:37:31,660 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 04:37:31,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:37:31,661 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:31,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 183 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:37:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 04:37:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-20 04:37:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 04:37:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-20 04:37:31,668 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 26 [2022-03-20 04:37:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:31,668 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-20 04:37:31,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 04:37:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-20 04:37:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 04:37:31,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:31,670 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:31,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:31,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 04:37:31,893 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2002833725, now seen corresponding path program 1 times [2022-03-20 04:37:31,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733073421] [2022-03-20 04:37:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:31,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:31,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656224740] [2022-03-20 04:37:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:31,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:31,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:31,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:31,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 04:37:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:31,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 04:37:31,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:37:32,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:37:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:37:32,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733073421] [2022-03-20 04:37:32,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656224740] [2022-03-20 04:37:32,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656224740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:37:32,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:37:32,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 04:37:32,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351732614] [2022-03-20 04:37:32,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:37:32,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 04:37:32,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 04:37:32,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 04:37:32,227 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:37:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:32,414 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2022-03-20 04:37:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 04:37:32,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 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 28 [2022-03-20 04:37:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:32,416 INFO L225 Difference]: With dead ends: 93 [2022-03-20 04:37:32,416 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 04:37:32,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 04:37:32,417 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:32,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 323 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:37:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 04:37:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2022-03-20 04:37:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 04:37:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-03-20 04:37:32,427 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2022-03-20 04:37:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:32,428 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-03-20 04:37:32,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:37:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-03-20 04:37:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 04:37:32,429 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:32,429 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:32,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:32,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:32,632 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1141865733, now seen corresponding path program 1 times [2022-03-20 04:37:32,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:32,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051482465] [2022-03-20 04:37:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:32,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:32,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:32,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8043504] [2022-03-20 04:37:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:32,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:32,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:32,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:32,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 04:37:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 04:37:32,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:37:32,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:37:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:37:32,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:32,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051482465] [2022-03-20 04:37:32,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:32,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8043504] [2022-03-20 04:37:32,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8043504] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 04:37:32,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:37:32,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 04:37:32,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905615345] [2022-03-20 04:37:32,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:37:32,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:37:32,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:32,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:37:32,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 04:37:32,938 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-20 04:37:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:32,979 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-03-20 04:37:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:37:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 31 [2022-03-20 04:37:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:32,980 INFO L225 Difference]: With dead ends: 74 [2022-03-20 04:37:32,980 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 04:37:32,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:37:32,981 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:32,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:37:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 04:37:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-03-20 04:37:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 04:37:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-03-20 04:37:32,996 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 31 [2022-03-20 04:37:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:32,996 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-03-20 04:37:32,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-20 04:37:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-03-20 04:37:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 04:37:32,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:32,997 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:33,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:33,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:33,219 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1101190558, now seen corresponding path program 1 times [2022-03-20 04:37:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:33,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37579929] [2022-03-20 04:37:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:33,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:33,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915904332] [2022-03-20 04:37:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:33,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:33,233 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:33,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 04:37:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 04:37:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:37:33,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:37:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:37:33,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:33,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37579929] [2022-03-20 04:37:33,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:33,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915904332] [2022-03-20 04:37:33,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915904332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:37:33,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:37:33,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 04:37:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895569771] [2022-03-20 04:37:33,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:37:33,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 04:37:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:33,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 04:37:33,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:37:33,592 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 04:37:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:33,727 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2022-03-20 04:37:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 04:37:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2022-03-20 04:37:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:33,730 INFO L225 Difference]: With dead ends: 106 [2022-03-20 04:37:33,730 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 04:37:33,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 04:37:33,732 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 52 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:33,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 324 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:37:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 04:37:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-03-20 04:37:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 04:37:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2022-03-20 04:37:33,747 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2022-03-20 04:37:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:33,747 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2022-03-20 04:37:33,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 04:37:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2022-03-20 04:37:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 04:37:33,748 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:33,748 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:33,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:33,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:33,959 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:33,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash -41147214, now seen corresponding path program 1 times [2022-03-20 04:37:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:33,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941728888] [2022-03-20 04:37:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:33,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:33,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:33,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800172160] [2022-03-20 04:37:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:33,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:33,972 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:33,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 04:37:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:34,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:37:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 04:37:34,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:37:34,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941728888] [2022-03-20 04:37:34,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:34,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800172160] [2022-03-20 04:37:34,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800172160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:37:34,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:37:34,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:37:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559582102] [2022-03-20 04:37:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:37:34,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:37:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:37:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:37:34,088 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 04:37:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:34,122 INFO L93 Difference]: Finished difference Result 146 states and 206 transitions. [2022-03-20 04:37:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:37:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 04:37:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:34,129 INFO L225 Difference]: With dead ends: 146 [2022-03-20 04:37:34,129 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 04:37:34,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:37:34,131 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:34,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:37:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 04:37:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-03-20 04:37:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 8 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 04:37:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 200 transitions. [2022-03-20 04:37:34,151 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 200 transitions. Word has length 36 [2022-03-20 04:37:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:34,152 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 200 transitions. [2022-03-20 04:37:34,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 04:37:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 200 transitions. [2022-03-20 04:37:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 04:37:34,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:34,153 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:34,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:34,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:34,354 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:34,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1201961419, now seen corresponding path program 1 times [2022-03-20 04:37:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216443509] [2022-03-20 04:37:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:34,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:34,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:34,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032224453] [2022-03-20 04:37:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:34,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:34,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:34,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:34,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 04:37:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 04:37:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:37:34,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:37:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:37:34,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216443509] [2022-03-20 04:37:34,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032224453] [2022-03-20 04:37:34,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032224453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:37:34,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:37:34,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-20 04:37:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915848374] [2022-03-20 04:37:34,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:37:34,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 04:37:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:34,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 04:37:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-20 04:37:34,784 INFO L87 Difference]: Start difference. First operand 140 states and 200 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 04:37:35,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:35,958 INFO L93 Difference]: Finished difference Result 266 states and 388 transitions. [2022-03-20 04:37:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 04:37:35,959 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2022-03-20 04:37:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:35,961 INFO L225 Difference]: With dead ends: 266 [2022-03-20 04:37:35,961 INFO L226 Difference]: Without dead ends: 266 [2022-03-20 04:37:35,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-20 04:37:35,962 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 173 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:35,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 355 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 04:37:35,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-20 04:37:35,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 253. [2022-03-20 04:37:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 158 states have (on average 1.3101265822784811) internal successors, (207), 159 states have internal predecessors, (207), 85 states have call successors, (85), 10 states have call predecessors, (85), 9 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 04:37:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 375 transitions. [2022-03-20 04:37:35,977 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 375 transitions. Word has length 36 [2022-03-20 04:37:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:35,977 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 375 transitions. [2022-03-20 04:37:35,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 04:37:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 375 transitions. [2022-03-20 04:37:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 04:37:35,978 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:35,978 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:36,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:36,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:36,203 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2036500795, now seen corresponding path program 1 times [2022-03-20 04:37:36,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:36,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748566374] [2022-03-20 04:37:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:36,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:36,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140922784] [2022-03-20 04:37:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:36,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:36,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:36,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 04:37:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:37:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 04:37:36,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:37:36,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:36,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748566374] [2022-03-20 04:37:36,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:36,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140922784] [2022-03-20 04:37:36,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140922784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:37:36,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:37:36,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:37:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745177853] [2022-03-20 04:37:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:37:36,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:37:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:37:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:37:36,338 INFO L87 Difference]: Start difference. First operand 253 states and 375 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 04:37:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:36,380 INFO L93 Difference]: Finished difference Result 412 states and 643 transitions. [2022-03-20 04:37:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:37:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-20 04:37:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:36,386 INFO L225 Difference]: With dead ends: 412 [2022-03-20 04:37:36,386 INFO L226 Difference]: Without dead ends: 412 [2022-03-20 04:37:36,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:37:36,388 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:36,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:37:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-03-20 04:37:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 357. [2022-03-20 04:37:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 181 states have (on average 1.270718232044199) internal successors, (230), 202 states have internal predecessors, (230), 165 states have call successors, (165), 11 states have call predecessors, (165), 10 states have return successors, (163), 143 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-20 04:37:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 558 transitions. [2022-03-20 04:37:36,440 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 558 transitions. Word has length 41 [2022-03-20 04:37:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:36,442 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 558 transitions. [2022-03-20 04:37:36,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 04:37:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 558 transitions. [2022-03-20 04:37:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 04:37:36,450 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:36,450 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:36,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:36,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 04:37:36,668 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:36,670 INFO L85 PathProgramCache]: Analyzing trace with hash -379845647, now seen corresponding path program 1 times [2022-03-20 04:37:36,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:36,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893463270] [2022-03-20 04:37:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:36,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:36,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:36,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794227871] [2022-03-20 04:37:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:36,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:36,683 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:36,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 04:37:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:36,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 04:37:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 04:37:37,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:37:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 04:37:38,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:37:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893463270] [2022-03-20 04:37:38,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:37:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794227871] [2022-03-20 04:37:38,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794227871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:37:38,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:37:38,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 04:37:38,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176369595] [2022-03-20 04:37:38,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:37:38,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 04:37:38,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:37:38,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 04:37:38,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-20 04:37:38,031 INFO L87 Difference]: Start difference. First operand 357 states and 558 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 04:37:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:37:44,969 INFO L93 Difference]: Finished difference Result 548 states and 851 transitions. [2022-03-20 04:37:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 04:37:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 53 [2022-03-20 04:37:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:37:44,975 INFO L225 Difference]: With dead ends: 548 [2022-03-20 04:37:44,975 INFO L226 Difference]: Without dead ends: 546 [2022-03-20 04:37:44,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 04:37:44,976 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 117 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-20 04:37:44,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 460 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-20 04:37:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-03-20 04:37:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 465. [2022-03-20 04:37:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 261 states have (on average 1.260536398467433) internal successors, (329), 280 states have internal predecessors, (329), 189 states have call successors, (189), 15 states have call predecessors, (189), 14 states have return successors, (187), 169 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-20 04:37:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 705 transitions. [2022-03-20 04:37:45,002 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 705 transitions. Word has length 53 [2022-03-20 04:37:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:37:45,003 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 705 transitions. [2022-03-20 04:37:45,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 04:37:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 705 transitions. [2022-03-20 04:37:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 04:37:45,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:37:45,004 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:37:45,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 04:37:45,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 04:37:45,228 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:37:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:37:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1179170910, now seen corresponding path program 1 times [2022-03-20 04:37:45,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:37:45,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630006616] [2022-03-20 04:37:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:45,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:37:45,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:37:45,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863044751] [2022-03-20 04:37:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:37:45,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:37:45,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:37:45,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:37:45,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 04:37:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:37:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 04:37:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:37:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-03-20 04:37:45,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:45:14,708 WARN L232 SmtUtils]: Spent 5.40s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)