/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 06:56:31,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 06:56:31,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 06:56:31,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 06:56:31,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 06:56:31,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 06:56:31,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 06:56:31,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 06:56:31,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 06:56:31,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 06:56:31,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 06:56:31,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 06:56:31,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 06:56:31,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 06:56:31,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 06:56:31,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 06:56:31,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 06:56:31,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 06:56:31,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 06:56:31,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 06:56:31,159 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 06:56:31,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 06:56:31,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 06:56:31,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 06:56:31,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 06:56:31,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 06:56:31,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 06:56:31,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 06:56:31,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 06:56:31,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 06:56:31,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 06:56:31,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 06:56:31,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 06:56:31,183 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 06:56:31,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 06:56:31,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 06:56:31,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 06:56:31,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 06:56:31,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 06:56:31,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 06:56:31,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 06:56:31,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 06:56:31,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 06:56:31,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 06:56:31,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 06:56:31,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 06:56:31,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 06:56:31,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 06:56:31,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:56:31,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 06:56:31,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 06:56:31,185 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 06:56:31,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 06:56:31,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 06:56:31,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 06:56:31,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 06:56:31,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 06:56:31,416 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 06:56:31,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-04-06 06:56:31,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dd79e59/a3ec4c73c0be41fbbb5a285a203beed8/FLAG4e13b9a54 [2022-04-06 06:56:31,831 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 06:56:31,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-04-06 06:56:31,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dd79e59/a3ec4c73c0be41fbbb5a285a203beed8/FLAG4e13b9a54 [2022-04-06 06:56:31,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dd79e59/a3ec4c73c0be41fbbb5a285a203beed8 [2022-04-06 06:56:31,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 06:56:31,849 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 06:56:31,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 06:56:31,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 06:56:31,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 06:56:31,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:56:31" (1/1) ... [2022-04-06 06:56:31,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:31, skipping insertion in model container [2022-04-06 06:56:31,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:56:31" (1/1) ... [2022-04-06 06:56:31,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 06:56:31,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 06:56:31,987 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2022-04-06 06:56:32,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:56:32,007 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 06:56:32,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2022-04-06 06:56:32,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:56:32,029 INFO L208 MainTranslator]: Completed translation [2022-04-06 06:56:32,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32 WrapperNode [2022-04-06 06:56:32,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 06:56:32,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 06:56:32,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 06:56:32,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 06:56:32,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 06:56:32,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 06:56:32,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 06:56:32,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 06:56:32,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:56:32,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:32,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 06:56:32,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 06:56:32,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 06:56:32,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 06:56:32,156 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 06:56:32,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 06:56:32,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 06:56:32,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 06:56:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 06:56:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 06:56:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 06:56:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 06:56:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 06:56:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 06:56:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 06:56:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 06:56:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 06:56:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 06:56:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 06:56:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 06:56:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 06:56:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 06:56:32,216 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 06:56:32,217 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 06:56:32,365 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 06:56:32,386 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 06:56:32,386 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 06:56:32,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:56:32 BoogieIcfgContainer [2022-04-06 06:56:32,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 06:56:32,389 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 06:56:32,389 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 06:56:32,390 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 06:56:32,393 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:56:32" (1/1) ... [2022-04-06 06:56:32,394 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 06:56:32,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:56:32 BasicIcfg [2022-04-06 06:56:32,426 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 06:56:32,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 06:56:32,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 06:56:32,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 06:56:32,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:56:31" (1/4) ... [2022-04-06 06:56:32,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2693730a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:56:32, skipping insertion in model container [2022-04-06 06:56:32,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:56:32" (2/4) ... [2022-04-06 06:56:32,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2693730a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:56:32, skipping insertion in model container [2022-04-06 06:56:32,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:56:32" (3/4) ... [2022-04-06 06:56:32,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2693730a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:56:32, skipping insertion in model container [2022-04-06 06:56:32,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:56:32" (4/4) ... [2022-04-06 06:56:32,431 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.cJordan [2022-04-06 06:56:32,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 06:56:32,435 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 06:56:32,467 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 06:56:32,472 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 [2022-04-06 06:56:32,472 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 06:56:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 06:56:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 06:56:32,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:32,490 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:32,491 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-04-06 06:56:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:32,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46860700] [2022-04-06 06:56:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:32,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:32,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:32,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346011858] [2022-04-06 06:56:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:32,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:32,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:32,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 06:56:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-06 06:56:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 06:56:32,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:56:32,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:32,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46860700] [2022-04-06 06:56:32,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:32,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346011858] [2022-04-06 06:56:32,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346011858] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:56:32,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:56:32,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-06 06:56:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085528732] [2022-04-06 06:56:32,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:56:32,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-06 06:56:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:32,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-06 06:56:32,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 06:56:32,761 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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) [2022-04-06 06:56:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:32,771 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-04-06 06:56:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-06 06:56:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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 22 [2022-04-06 06:56:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:32,777 INFO L225 Difference]: With dead ends: 37 [2022-04-06 06:56:32,777 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 06:56:32,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 06:56:32,781 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:32,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:56:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 06:56:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 06:56:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 06:56:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 06:56:32,804 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-04-06 06:56:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:32,805 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 06:56:32,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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) [2022-04-06 06:56:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 06:56:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:56:32,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:32,806 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] [2022-04-06 06:56:32,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:33,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-06 06:56:33,022 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:33,023 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-04-06 06:56:33,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:33,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181998467] [2022-04-06 06:56:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:33,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:33,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103814389] [2022-04-06 06:56:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:33,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:33,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:33,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 06:56:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:33,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 06:56:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:33,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:56:33,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181998467] [2022-04-06 06:56:33,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:33,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103814389] [2022-04-06 06:56:33,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103814389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:56:33,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:56:33,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 06:56:33,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498437422] [2022-04-06 06:56:33,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:56:33,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:56:33,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:33,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:56:33,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:56:33,156 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:56:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:33,168 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-04-06 06:56:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 06:56:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 06:56:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:33,169 INFO L225 Difference]: With dead ends: 34 [2022-04-06 06:56:33,169 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 06:56:33,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:56:33,170 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:33,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:56:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 06:56:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 06:56:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 06:56:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-04-06 06:56:33,177 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-04-06 06:56:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:33,178 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-04-06 06:56:33,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:56:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-04-06 06:56:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:56:33,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:33,179 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] [2022-04-06 06:56:33,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 06:56:33,394 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,SelfDestructingSolverStorable1 [2022-04-06 06:56:33,394 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:33,395 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-04-06 06:56:33,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:33,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527577306] [2022-04-06 06:56:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:33,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:33,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984299629] [2022-04-06 06:56:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:33,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:33,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:33,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 06:56:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:33,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 06:56:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:34,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:56:34,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527577306] [2022-04-06 06:56:34,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984299629] [2022-04-06 06:56:34,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984299629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:56:34,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:56:34,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:56:34,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964847472] [2022-04-06 06:56:34,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:56:34,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:56:34,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:34,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:56:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:56:34,532 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:56:38,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:56:40,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:56:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:40,912 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-04-06 06:56:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:56:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-06 06:56:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:40,914 INFO L225 Difference]: With dead ends: 51 [2022-04-06 06:56:40,915 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 06:56:40,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:56:40,916 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:40,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-04-06 06:56:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 06:56:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 06:56:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 06:56:40,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-04-06 06:56:40,931 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-04-06 06:56:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:40,932 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-04-06 06:56:40,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:56:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-04-06 06:56:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 06:56:40,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:40,933 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] [2022-04-06 06:56:40,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:41,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:41,148 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-04-06 06:56:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:41,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388229548] [2022-04-06 06:56:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:41,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:41,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522169682] [2022-04-06 06:56:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:41,158 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:41,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 06:56:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:41,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 06:56:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:41,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:41,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388229548] [2022-04-06 06:56:41,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522169682] [2022-04-06 06:56:41,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522169682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:41,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:41,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 06:56:41,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644699697] [2022-04-06 06:56:41,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:41,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 06:56:41,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 06:56:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:56:41,463 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 06:56:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:41,577 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-04-06 06:56:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 06:56:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-04-06 06:56:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:41,578 INFO L225 Difference]: With dead ends: 55 [2022-04-06 06:56:41,578 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 06:56:41,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 06:56:41,579 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:41,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 147 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:56:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 06:56:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 06:56:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 06:56:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-04-06 06:56:41,585 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2022-04-06 06:56:41,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:41,585 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-04-06 06:56:41,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 06:56:41,585 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-04-06 06:56:41,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 06:56:41,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:41,586 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 06:56:41,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:41,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:41,787 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:41,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:41,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-04-06 06:56:41,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:41,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582711222] [2022-04-06 06:56:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:41,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:41,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:41,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950974317] [2022-04-06 06:56:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:41,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:41,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 06:56:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:56:41,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:41,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:56:41,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:41,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582711222] [2022-04-06 06:56:41,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:41,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950974317] [2022-04-06 06:56:41,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950974317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:56:41,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:56:41,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:56:41,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666909124] [2022-04-06 06:56:41,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:56:41,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:56:41,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:56:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:56:41,917 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 06:56:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:41,941 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-04-06 06:56:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:56:41,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-04-06 06:56:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:41,945 INFO L225 Difference]: With dead ends: 60 [2022-04-06 06:56:41,945 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 06:56:41,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:56:41,949 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:41,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:56:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 06:56:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-06 06:56:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 06:56:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-04-06 06:56:41,969 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 35 [2022-04-06 06:56:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:41,969 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-04-06 06:56:41,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 06:56:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-04-06 06:56:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 06:56:41,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:41,973 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:41,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:42,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:42,188 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-04-06 06:56:42,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:42,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323870555] [2022-04-06 06:56:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:42,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:42,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:42,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784085249] [2022-04-06 06:56:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:42,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:42,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 06:56:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:42,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:56:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:42,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:56:42,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323870555] [2022-04-06 06:56:42,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784085249] [2022-04-06 06:56:42,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784085249] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 06:56:42,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 06:56:42,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-04-06 06:56:42,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113892519] [2022-04-06 06:56:42,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:56:42,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 06:56:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:42,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 06:56:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:56:42,441 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 06:56:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:42,467 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-04-06 06:56:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:56:42,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-04-06 06:56:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:42,468 INFO L225 Difference]: With dead ends: 69 [2022-04-06 06:56:42,468 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 06:56:42,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:56:42,468 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:42,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:56:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 06:56:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 06:56:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 06:56:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-04-06 06:56:42,472 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 41 [2022-04-06 06:56:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:42,473 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-04-06 06:56:42,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 06:56:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-04-06 06:56:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 06:56:42,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:42,474 INFO L499 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2022-04-06 06:56:42,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:42,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:42,684 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-04-06 06:56:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:42,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147373871] [2022-04-06 06:56:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:42,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:42,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:42,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649894338] [2022-04-06 06:56:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:42,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:42,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:42,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 06:56:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:56:42,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:42,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:56:42,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:42,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147373871] [2022-04-06 06:56:42,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:42,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649894338] [2022-04-06 06:56:42,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649894338] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:42,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:42,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 06:56:42,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145474914] [2022-04-06 06:56:42,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:42,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 06:56:42,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 06:56:42,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:56:42,906 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-04-06 06:56:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:43,012 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2022-04-06 06:56:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 06:56:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-04-06 06:56:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:43,013 INFO L225 Difference]: With dead ends: 137 [2022-04-06 06:56:43,014 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 06:56:43,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:56:43,014 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 73 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:43,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 173 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:56:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 06:56:43,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2022-04-06 06:56:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 22 states have call successors, (22), 13 states have call predecessors, (22), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 06:56:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 152 transitions. [2022-04-06 06:56:43,021 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 152 transitions. Word has length 43 [2022-04-06 06:56:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:43,022 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 152 transitions. [2022-04-06 06:56:43,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-04-06 06:56:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 152 transitions. [2022-04-06 06:56:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 06:56:43,022 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:43,022 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:43,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:43,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:43,232 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-04-06 06:56:43,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:43,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139650380] [2022-04-06 06:56:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:43,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:43,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:43,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522006027] [2022-04-06 06:56:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:43,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:43,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:43,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:43,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 06:56:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 06:56:43,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:56:43,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:56:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139650380] [2022-04-06 06:56:43,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522006027] [2022-04-06 06:56:43,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522006027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:56:43,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:56:43,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 06:56:43,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414784021] [2022-04-06 06:56:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:56:43,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:56:43,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:56:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:56:43,341 INFO L87 Difference]: Start difference. First operand 123 states and 152 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:56:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:43,365 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2022-04-06 06:56:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 06:56:43,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-04-06 06:56:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:43,367 INFO L225 Difference]: With dead ends: 119 [2022-04-06 06:56:43,367 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 06:56:43,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:56:43,367 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:43,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 94 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:56:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 06:56:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-04-06 06:56:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 06:56:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-04-06 06:56:43,373 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-04-06 06:56:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:43,373 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-04-06 06:56:43,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:56:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-04-06 06:56:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 06:56:43,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:43,374 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:43,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 06:56:43,575 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,SelfDestructingSolverStorable7 [2022-04-06 06:56:43,576 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-04-06 06:56:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598281416] [2022-04-06 06:56:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:43,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:43,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:43,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473297006] [2022-04-06 06:56:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:43,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:43,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:43,584 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) [2022-04-06 06:56:43,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 06:56:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 06:56:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:43,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:56:43,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:43,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598281416] [2022-04-06 06:56:43,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:43,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473297006] [2022-04-06 06:56:43,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473297006] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:43,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:43,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 06:56:43,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034894259] [2022-04-06 06:56:43,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:43,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 06:56:43,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 06:56:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:56:43,816 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-04-06 06:56:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:43,952 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2022-04-06 06:56:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 06:56:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-04-06 06:56:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:43,954 INFO L225 Difference]: With dead ends: 172 [2022-04-06 06:56:43,954 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 06:56:43,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-04-06 06:56:43,956 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 107 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:43,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 275 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:56:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 06:56:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-04-06 06:56:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 06:56:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-04-06 06:56:43,962 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-04-06 06:56:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:43,962 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-04-06 06:56:43,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-04-06 06:56:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-04-06 06:56:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 06:56:43,963 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:43,963 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:43,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:44,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:44,171 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-04-06 06:56:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:44,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717971871] [2022-04-06 06:56:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:44,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:44,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843877674] [2022-04-06 06:56:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:44,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:44,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:44,179 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) [2022-04-06 06:56:44,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 06:56:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 06:56:44,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:44,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 06:56:44,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:44,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717971871] [2022-04-06 06:56:44,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:44,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843877674] [2022-04-06 06:56:44,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843877674] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:44,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:44,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 06:56:44,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631762905] [2022-04-06 06:56:44,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:44,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 06:56:44,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:44,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 06:56:44,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:56:44,415 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 06:56:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:44,586 INFO L93 Difference]: Finished difference Result 206 states and 267 transitions. [2022-04-06 06:56:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 06:56:44,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-04-06 06:56:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:44,588 INFO L225 Difference]: With dead ends: 206 [2022-04-06 06:56:44,588 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 06:56:44,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-04-06 06:56:44,589 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 199 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:44,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 243 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:56:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 06:56:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-04-06 06:56:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 06:56:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-04-06 06:56:44,595 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-04-06 06:56:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:44,595 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-04-06 06:56:44,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 06:56:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-04-06 06:56:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 06:56:44,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:44,597 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 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, 1] [2022-04-06 06:56:44,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:44,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 06:56:44,797 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:44,798 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-04-06 06:56:44,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:44,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943671953] [2022-04-06 06:56:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:44,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:44,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:44,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591796329] [2022-04-06 06:56:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:44,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:44,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:44,806 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:44,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 06:56:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 06:56:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-06 06:56:44,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 06:56:45,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:45,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943671953] [2022-04-06 06:56:45,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:45,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591796329] [2022-04-06 06:56:45,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591796329] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:45,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:45,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-04-06 06:56:45,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417392854] [2022-04-06 06:56:45,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:45,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:56:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:45,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:56:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:56:45,131 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 06:56:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:45,183 INFO L93 Difference]: Finished difference Result 381 states and 522 transitions. [2022-04-06 06:56:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:56:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-04-06 06:56:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:45,188 INFO L225 Difference]: With dead ends: 381 [2022-04-06 06:56:45,188 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 06:56:45,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:56:45,189 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:45,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 142 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:56:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 06:56:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-04-06 06:56:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-06 06:56:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-04-06 06:56:45,206 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-04-06 06:56:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:45,207 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-04-06 06:56:45,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 06:56:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-04-06 06:56:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 06:56:45,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:45,210 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:45,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:45,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 06:56:45,423 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:45,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-04-06 06:56:45,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:45,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982085008] [2022-04-06 06:56:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:45,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:45,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:45,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689536078] [2022-04-06 06:56:45,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:56:45,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:45,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:45,432 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:45,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 06:56:45,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:56:45,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:56:45,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 06:56:45,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:56:45,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 06:56:45,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982085008] [2022-04-06 06:56:45,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689536078] [2022-04-06 06:56:45,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689536078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:45,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:45,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-04-06 06:56:45,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166247787] [2022-04-06 06:56:45,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:45,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 06:56:45,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:45,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 06:56:45,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:56:45,808 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2022-04-06 06:56:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:45,970 INFO L93 Difference]: Finished difference Result 352 states and 468 transitions. [2022-04-06 06:56:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 06:56:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) Word has length 91 [2022-04-06 06:56:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:45,972 INFO L225 Difference]: With dead ends: 352 [2022-04-06 06:56:45,972 INFO L226 Difference]: Without dead ends: 352 [2022-04-06 06:56:45,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-04-06 06:56:45,972 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 113 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:45,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 255 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:56:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-04-06 06:56:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2022-04-06 06:56:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 263 states have (on average 1.2243346007604563) internal successors, (322), 263 states have internal predecessors, (322), 72 states have call successors, (72), 14 states have call predecessors, (72), 12 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-04-06 06:56:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 464 transitions. [2022-04-06 06:56:45,983 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 464 transitions. Word has length 91 [2022-04-06 06:56:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:45,984 INFO L478 AbstractCegarLoop]: Abstraction has 348 states and 464 transitions. [2022-04-06 06:56:45,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2022-04-06 06:56:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 464 transitions. [2022-04-06 06:56:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 06:56:45,987 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:45,987 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-04-06 06:56:46,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:46,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 06:56:46,204 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-04-06 06:56:46,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:46,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030386733] [2022-04-06 06:56:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:46,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:46,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:46,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738961116] [2022-04-06 06:56:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:46,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:46,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:46,212 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:46,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 06:56:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 06:56:46,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:56:46,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 06:56:46,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030386733] [2022-04-06 06:56:46,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738961116] [2022-04-06 06:56:46,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738961116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:46,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:46,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-04-06 06:56:46,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798272364] [2022-04-06 06:56:46,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:46,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 06:56:46,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 06:56:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-04-06 06:56:46,696 INFO L87 Difference]: Start difference. First operand 348 states and 464 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-04-06 06:56:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:46,905 INFO L93 Difference]: Finished difference Result 350 states and 461 transitions. [2022-04-06 06:56:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 06:56:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) Word has length 97 [2022-04-06 06:56:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:46,907 INFO L225 Difference]: With dead ends: 350 [2022-04-06 06:56:46,907 INFO L226 Difference]: Without dead ends: 346 [2022-04-06 06:56:46,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-04-06 06:56:46,908 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 168 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:46,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 225 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:56:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-04-06 06:56:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-04-06 06:56:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 261 states have (on average 1.1992337164750957) internal successors, (313), 261 states have internal predecessors, (313), 72 states have call successors, (72), 14 states have call predecessors, (72), 12 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-04-06 06:56:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 455 transitions. [2022-04-06 06:56:46,920 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 455 transitions. Word has length 97 [2022-04-06 06:56:46,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:46,920 INFO L478 AbstractCegarLoop]: Abstraction has 346 states and 455 transitions. [2022-04-06 06:56:46,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-04-06 06:56:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 455 transitions. [2022-04-06 06:56:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 06:56:46,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:46,922 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-04-06 06:56:46,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:47,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 06:56:47,143 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:47,144 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-04-06 06:56:47,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:47,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763981547] [2022-04-06 06:56:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:47,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:47,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:47,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47175627] [2022-04-06 06:56:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:47,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:47,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:47,152 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:56:47,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 06:56:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 06:56:47,303 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 06:56:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 06:56:47,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 06:56:47,363 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 06:56:47,364 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 06:56:47,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:47,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:47,586 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:47,587 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 06:56:47,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:56:47 BasicIcfg [2022-04-06 06:56:47,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 06:56:47,617 INFO L158 Benchmark]: Toolchain (without parser) took 15768.46ms. Allocated memory was 219.2MB in the beginning and 263.2MB in the end (delta: 44.0MB). Free memory was 168.3MB in the beginning and 123.5MB in the end (delta: 44.9MB). Peak memory consumption was 89.1MB. Max. memory is 8.0GB. [2022-04-06 06:56:47,617 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 219.2MB. Free memory was 184.8MB in the beginning and 184.7MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 06:56:47,618 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.37ms. Allocated memory is still 219.2MB. Free memory was 168.2MB in the beginning and 194.3MB in the end (delta: -26.1MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-04-06 06:56:47,618 INFO L158 Benchmark]: Boogie Preprocessor took 40.00ms. Allocated memory is still 219.2MB. Free memory was 194.3MB in the beginning and 192.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 06:56:47,618 INFO L158 Benchmark]: RCFGBuilder took 317.73ms. Allocated memory is still 219.2MB. Free memory was 192.9MB in the beginning and 182.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 06:56:47,618 INFO L158 Benchmark]: IcfgTransformer took 37.15ms. Allocated memory is still 219.2MB. Free memory was 182.1MB in the beginning and 180.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 06:56:47,618 INFO L158 Benchmark]: TraceAbstraction took 15189.97ms. Allocated memory was 219.2MB in the beginning and 263.2MB in the end (delta: 44.0MB). Free memory was 180.3MB in the beginning and 123.5MB in the end (delta: 56.8MB). Peak memory consumption was 101.6MB. Max. memory is 8.0GB. [2022-04-06 06:56:47,619 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 219.2MB. Free memory was 184.8MB in the beginning and 184.7MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 179.37ms. Allocated memory is still 219.2MB. Free memory was 168.2MB in the beginning and 194.3MB in the end (delta: -26.1MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.00ms. Allocated memory is still 219.2MB. Free memory was 194.3MB in the beginning and 192.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 317.73ms. Allocated memory is still 219.2MB. Free memory was 192.9MB in the beginning and 182.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 37.15ms. Allocated memory is still 219.2MB. Free memory was 182.1MB in the beginning and 180.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 15189.97ms. Allocated memory was 219.2MB in the beginning and 263.2MB in the end (delta: 44.0MB). Free memory was 180.3MB in the beginning and 123.5MB in the end (delta: 56.8MB). Peak memory consumption was 101.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=14, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=7, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=7, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=7, counter=0, r=-3, R=2, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=1, counter++=0, R=2, r=-3, u=5, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=1, r=-3, R=2, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=1, R=2, r=-3, u=5, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=2, counter++=1, r=-3, R=2, u=5, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=2, R=2, r=-3, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=7, counter=2, r=-3, R=2, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=3, counter++=2, r=-3, R=2, u=5, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=3, R=2, r=-3, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=7, counter=3, R=2, r=2, u=7, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=4, counter++=3, r=2, R=2, u=7, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=4, R=2, r=2, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=7, counter=4, r=2, R=2, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=5, counter++=4, r=2, R=2, u=7, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=5, r=2, R=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=5, R=2, r=2, u=7, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=6, counter++=5, r=2, R=2, u=7, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=6, R=2, r=2, u=7, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=7, counter=6, R=2, r=1, u=7, v=3] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=7, counter++=6, R=2, r=1, u=7, v=3] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=7, R=2, r=1, u=7, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=7, counter=7, R=2, r=-2, u=7, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=8, counter++=7, R=2, r=-2, u=7, v=5] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=8, R=2, r=-2, u=7, v=5] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=7, counter=8, R=2, r=-2, u=7, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=9, counter++=8, R=2, r=-2, u=7, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=9, r=-2, R=2, u=7, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=7, counter=9, r=5, R=2, u=9, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=10, counter++=9, R=2, r=5, u=9, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=10, r=5, R=2, u=9, v=5] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=7, counter=10, r=5, R=2, u=9, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=11, counter++=10, R=2, r=5, u=9, v=5] [L34] COND FALSE !(counter++<10) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.1s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 791 SdHoareTripleChecker+Valid, 7.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 780 mSDsluCounter, 2065 SdHoareTripleChecker+Invalid, 6.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1448 mSDsCounter, 440 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 751 IncrementalHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 440 mSolverCounterUnsat, 617 mSDtfsCounter, 751 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1164 GetRequests, 1044 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=348occurred in iteration=12, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 74 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 749 NumberOfCodeBlocks, 749 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1121 ConstructedInterpolants, 0 QuantifiedInterpolants, 2555 SizeOfPredicates, 47 NumberOfNonLiveVariables, 1931 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 934/1396 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 06:56:47,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...