/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/array-fpi/eqn1f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 11:05:32,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 11:05:32,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 11:05:32,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 11:05:32,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 11:05:32,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 11:05:32,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 11:05:32,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 11:05:32,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 11:05:32,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 11:05:32,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 11:05:32,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 11:05:32,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 11:05:32,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 11:05:32,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 11:05:32,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 11:05:32,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 11:05:32,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 11:05:32,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 11:05:32,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 11:05:32,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 11:05:32,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 11:05:32,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 11:05:32,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 11:05:32,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 11:05:32,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 11:05:32,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 11:05:32,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 11:05:32,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 11:05:32,174 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 11:05:32,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 11:05:32,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 11:05:32,176 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 11:05:32,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 11:05:32,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 11:05:32,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 11:05:32,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 11:05:32,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 11:05:32,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 11:05:32,177 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 11:05:32,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 11:05:32,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 11:05:32,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 11:05:32,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 11:05:32,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 11:05:32,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 11:05:32,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 11:05:32,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:05:32,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 11:05:32,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 11:05:32,179 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 11:05:32,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 11:05:32,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 11:05:32,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 11:05:32,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 11:05:32,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 11:05:32,410 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 11:05:32,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn1f.c [2022-01-31 11:05:32,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0099533bf/7663fbb2097c45af851173a722e6912b/FLAG8bbfc9d0b [2022-01-31 11:05:32,777 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 11:05:32,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn1f.c [2022-01-31 11:05:32,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0099533bf/7663fbb2097c45af851173a722e6912b/FLAG8bbfc9d0b [2022-01-31 11:05:33,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0099533bf/7663fbb2097c45af851173a722e6912b [2022-01-31 11:05:33,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 11:05:33,218 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 11:05:33,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 11:05:33,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 11:05:33,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 11:05:33,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d53b849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33, skipping insertion in model container [2022-01-31 11:05:33,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 11:05:33,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 11:05:33,368 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn1f.c[588,601] [2022-01-31 11:05:33,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:05:33,388 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 11:05:33,397 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn1f.c[588,601] [2022-01-31 11:05:33,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:05:33,413 INFO L208 MainTranslator]: Completed translation [2022-01-31 11:05:33,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33 WrapperNode [2022-01-31 11:05:33,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 11:05:33,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 11:05:33,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 11:05:33,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 11:05:33,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 11:05:33,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 11:05:33,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 11:05:33,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 11:05:33,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:05:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:33,465 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) [2022-01-31 11:05:33,473 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 [2022-01-31 11:05:33,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 11:05:33,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 11:05:33,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 11:05:33,500 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 11:05:33,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 11:05:33,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 11:05:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 11:05:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 11:05:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 11:05:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 11:05:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 11:05:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 11:05:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 11:05:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 11:05:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 11:05:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 11:05:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 11:05:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 11:05:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 11:05:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 11:05:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 11:05:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 11:05:33,553 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 11:05:33,554 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 11:05:33,694 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 11:05:33,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 11:05:33,698 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 11:05:33,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:05:33 BoogieIcfgContainer [2022-01-31 11:05:33,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 11:05:33,701 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 11:05:33,701 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 11:05:33,702 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 11:05:33,716 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:05:33" (1/1) ... [2022-01-31 11:05:33,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:05:33 BasicIcfg [2022-01-31 11:05:33,739 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 11:05:33,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 11:05:33,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 11:05:33,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 11:05:33,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:05:33" (1/4) ... [2022-01-31 11:05:33,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cac287d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:05:33, skipping insertion in model container [2022-01-31 11:05:33,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:05:33" (2/4) ... [2022-01-31 11:05:33,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cac287d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:05:33, skipping insertion in model container [2022-01-31 11:05:33,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:05:33" (3/4) ... [2022-01-31 11:05:33,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cac287d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:05:33, skipping insertion in model container [2022-01-31 11:05:33,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:05:33" (4/4) ... [2022-01-31 11:05:33,751 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn1f.cJordan [2022-01-31 11:05:33,755 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 11:05:33,755 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 11:05:33,793 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 11:05:33,799 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 11:05:33,799 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 11:05:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:05:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 11:05:33,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:33,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:33,835 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash 683153263, now seen corresponding path program 1 times [2022-01-31 11:05:33,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:33,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958523349] [2022-01-31 11:05:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:33,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:34,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:05:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:34,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:05:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:34,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958523349] [2022-01-31 11:05:34,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958523349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:05:34,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:05:34,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 11:05:34,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413316264] [2022-01-31 11:05:34,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:05:34,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 11:05:34,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:34,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 11:05:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:05:34,121 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:34,194 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-01-31 11:05:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 11:05:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 11:05:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:34,203 INFO L225 Difference]: With dead ends: 34 [2022-01-31 11:05:34,203 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 11:05:34,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:05:34,211 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:34,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:05:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 11:05:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 11:05:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 11:05:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 11:05:34,241 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2022-01-31 11:05:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:34,242 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 11:05:34,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 11:05:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 11:05:34,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:34,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:34,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 11:05:34,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash -530200526, now seen corresponding path program 1 times [2022-01-31 11:05:34,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:34,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294386529] [2022-01-31 11:05:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:34,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:34,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:34,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650184331] [2022-01-31 11:05:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:34,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:34,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:34,281 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) [2022-01-31 11:05:34,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 11:05:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:34,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 11:05:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:34,474 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-31 11:05:34,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-31 11:05:34,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:34,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:34,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 11:05:34,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-31 11:05:34,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:05:34,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:05:34,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-31 11:05:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:34,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 11:05:34,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294386529] [2022-01-31 11:05:34,782 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650184331] [2022-01-31 11:05:34,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650184331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:05:34,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:05:34,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 11:05:34,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610845480] [2022-01-31 11:05:34,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:05:34,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 11:05:34,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 11:05:34,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 11:05:34,794 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:34,888 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-01-31 11:05:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 11:05:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 11:05:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:34,890 INFO L225 Difference]: With dead ends: 45 [2022-01-31 11:05:34,890 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 11:05:34,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:05:34,892 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:34,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:05:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 11:05:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-01-31 11:05:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:05:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-01-31 11:05:34,900 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2022-01-31 11:05:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:34,900 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-01-31 11:05:34,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-01-31 11:05:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 11:05:34,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:34,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:34,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:35,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:35,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 308115632, now seen corresponding path program 1 times [2022-01-31 11:05:35,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:35,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436520178] [2022-01-31 11:05:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:35,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:35,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:35,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160346486] [2022-01-31 11:05:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:35,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:35,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:35,147 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) [2022-01-31 11:05:35,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 11:05:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 11:05:35,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:35,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 11:05:35,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:35,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436520178] [2022-01-31 11:05:35,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:35,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160346486] [2022-01-31 11:05:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160346486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:05:35,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:05:35,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 11:05:35,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689678555] [2022-01-31 11:05:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:05:35,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 11:05:35,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 11:05:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 11:05:35,307 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:35,372 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-01-31 11:05:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 11:05:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 11:05:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:35,377 INFO L225 Difference]: With dead ends: 58 [2022-01-31 11:05:35,378 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 11:05:35,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 11:05:35,383 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:35,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 75 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:05:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 11:05:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2022-01-31 11:05:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:05:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-31 11:05:35,391 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2022-01-31 11:05:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:35,391 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-31 11:05:35,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-31 11:05:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 11:05:35,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:35,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:35,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 11:05:35,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 11:05:35,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:35,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1912898706, now seen corresponding path program 1 times [2022-01-31 11:05:35,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:35,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245987460] [2022-01-31 11:05:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:35,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:35,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:35,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142222681] [2022-01-31 11:05:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:35,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:35,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:35,619 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) [2022-01-31 11:05:35,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 11:05:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 11:05:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:35,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:35,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:35,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245987460] [2022-01-31 11:05:35,789 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:35,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142222681] [2022-01-31 11:05:35,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142222681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:35,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:35,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-01-31 11:05:35,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017037262] [2022-01-31 11:05:35,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:35,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 11:05:35,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 11:05:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 11:05:35,793 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:35,928 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-01-31 11:05:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 11:05:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 11:05:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:35,929 INFO L225 Difference]: With dead ends: 55 [2022-01-31 11:05:35,929 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 11:05:35,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-31 11:05:35,931 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:35,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 90 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:05:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 11:05:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-01-31 11:05:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:05:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-01-31 11:05:35,936 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2022-01-31 11:05:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:35,936 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-01-31 11:05:35,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-01-31 11:05:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 11:05:35,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:35,937 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 11:05:35,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:36,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:36,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1319940884, now seen corresponding path program 1 times [2022-01-31 11:05:36,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:36,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239271254] [2022-01-31 11:05:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:36,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:36,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:36,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071171075] [2022-01-31 11:05:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:36,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:36,186 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) [2022-01-31 11:05:36,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 11:05:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:36,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 11:05:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:36,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 11:05:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:36,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-31 11:05:36,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:36,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:05:36,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:36,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 11:05:36,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:05:36,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:05:36,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-31 11:05:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:36,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:36,588 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_126 (Array Int Int))) (= (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_126) c_main_~b~0.base) c_main_~b~0.offset) 1)) is different from false [2022-01-31 11:05:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-31 11:05:36,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:36,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239271254] [2022-01-31 11:05:36,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:36,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071171075] [2022-01-31 11:05:36,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071171075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:36,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:36,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-31 11:05:36,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666949581] [2022-01-31 11:05:36,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:36,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 11:05:36,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:36,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 11:05:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=123, Unknown=1, NotChecked=22, Total=182 [2022-01-31 11:05:36,654 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:36,811 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-01-31 11:05:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 11:05:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 11:05:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:36,813 INFO L225 Difference]: With dead ends: 63 [2022-01-31 11:05:36,813 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 11:05:36,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=188, Unknown=1, NotChecked=28, Total=272 [2022-01-31 11:05:36,814 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:36,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 219 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-01-31 11:05:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 11:05:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2022-01-31 11:05:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:05:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-01-31 11:05:36,820 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2022-01-31 11:05:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:36,821 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-01-31 11:05:36,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-01-31 11:05:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 11:05:36,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:36,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:36,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:37,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:37,047 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1576842986, now seen corresponding path program 2 times [2022-01-31 11:05:37,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:37,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816550913] [2022-01-31 11:05:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:37,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:37,069 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:37,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406790692] [2022-01-31 11:05:37,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:05:37,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:37,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:37,071 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) [2022-01-31 11:05:37,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 11:05:37,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:05:37,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:05:37,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:05:37,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:37,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:37,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:37,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816550913] [2022-01-31 11:05:37,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:37,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406790692] [2022-01-31 11:05:37,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406790692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:37,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:37,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 11:05:37,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616805223] [2022-01-31 11:05:37,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:37,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:05:37,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:05:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:05:37,285 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:37,445 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-01-31 11:05:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 11:05:37,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 11:05:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:37,447 INFO L225 Difference]: With dead ends: 76 [2022-01-31 11:05:37,447 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 11:05:37,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-01-31 11:05:37,448 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:37,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 87 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:05:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 11:05:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2022-01-31 11:05:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:05:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-01-31 11:05:37,458 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 28 [2022-01-31 11:05:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:37,459 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-01-31 11:05:37,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-01-31 11:05:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 11:05:37,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:37,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:37,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:37,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:37,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1780810280, now seen corresponding path program 3 times [2022-01-31 11:05:37,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:37,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976026061] [2022-01-31 11:05:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:37,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:37,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:37,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323124003] [2022-01-31 11:05:37,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:05:37,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:37,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:37,725 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) [2022-01-31 11:05:37,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 11:05:37,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 11:05:37,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:05:37,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:05:37,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:37,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:37,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:37,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976026061] [2022-01-31 11:05:37,914 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:37,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323124003] [2022-01-31 11:05:37,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323124003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:37,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:37,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 11:05:37,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916573506] [2022-01-31 11:05:37,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:37,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:05:37,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:37,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:05:37,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:05:37,916 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:38,040 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-01-31 11:05:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 11:05:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 11:05:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:38,041 INFO L225 Difference]: With dead ends: 65 [2022-01-31 11:05:38,041 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 11:05:38,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-31 11:05:38,042 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:38,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 135 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:05:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 11:05:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2022-01-31 11:05:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:05:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-01-31 11:05:38,046 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 28 [2022-01-31 11:05:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:38,046 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-01-31 11:05:38,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-01-31 11:05:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 11:05:38,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:38,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:38,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:38,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:38,261 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:38,261 INFO L85 PathProgramCache]: Analyzing trace with hash 691408166, now seen corresponding path program 4 times [2022-01-31 11:05:38,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:38,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436447130] [2022-01-31 11:05:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:38,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:38,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:38,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533734202] [2022-01-31 11:05:38,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:05:38,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:38,281 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) [2022-01-31 11:05:38,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 11:05:38,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:05:38,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:05:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 11:05:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:38,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 11:05:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:38,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-31 11:05:38,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:38,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:05:38,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:05:38,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:38,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:05:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:38,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:05:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:05:38,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:05:38,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-31 11:05:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:05:38,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:40,672 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_48 Int)) (or (forall ((v_ArrVal_244 Int)) (= (select (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_48 8) c_main_~b~0.offset) v_ArrVal_244) c_main_~b~0.offset) 1)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_48)))) is different from false [2022-01-31 11:05:41,000 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 Int) (v_ArrVal_242 Int) (v_main_~i~0_48 Int)) (or (not (<= 2 v_main_~i~0_48)) (= (select (store (store (select |c_#memory_int| c_main_~b~0.base) (+ 8 c_main_~b~0.offset) v_ArrVal_242) (+ (* v_main_~i~0_48 8) c_main_~b~0.offset) v_ArrVal_244) c_main_~b~0.offset) 1))) is different from false [2022-01-31 11:05:41,038 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 Int) (v_ArrVal_242 Int) (v_main_~i~0_48 Int) (v_ArrVal_241 (Array Int Int))) (or (not (<= 2 v_main_~i~0_48)) (= (select (store (store (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_241) c_main_~b~0.base) (+ 8 c_main_~b~0.offset) v_ArrVal_242) (+ (* v_main_~i~0_48 8) c_main_~b~0.offset) v_ArrVal_244) c_main_~b~0.offset) 1))) is different from false [2022-01-31 11:05:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-01-31 11:05:41,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:41,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436447130] [2022-01-31 11:05:41,089 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:41,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533734202] [2022-01-31 11:05:41,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533734202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:41,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:41,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2022-01-31 11:05:41,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11806752] [2022-01-31 11:05:41,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:41,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 11:05:41,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 11:05:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=168, Unknown=3, NotChecked=84, Total=306 [2022-01-31 11:05:41,091 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:43,181 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~b~0.base) c_main_~b~0.offset) 1) (= c_main_~b~0.offset 0) (forall ((v_main_~i~0_48 Int)) (or (forall ((v_ArrVal_244 Int)) (= (select (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_48 8) c_main_~b~0.offset) v_ArrVal_244) c_main_~b~0.offset) 1)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_48)))) (= c_main_~i~0 1)) is different from false [2022-01-31 11:05:45,209 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~b~0.base) c_main_~b~0.offset) 1) (<= 2 c_main_~i~0) (= c_main_~b~0.offset 0) (forall ((v_main_~i~0_48 Int)) (or (forall ((v_ArrVal_244 Int)) (= (select (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_48 8) c_main_~b~0.offset) v_ArrVal_244) c_main_~b~0.offset) 1)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_48))))) is different from false [2022-01-31 11:05:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:45,333 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-01-31 11:05:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 11:05:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 11:05:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:45,334 INFO L225 Difference]: With dead ends: 76 [2022-01-31 11:05:45,334 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 11:05:45,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=105, Invalid=372, Unknown=5, NotChecked=220, Total=702 [2022-01-31 11:05:45,336 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:45,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 252 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 186 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2022-01-31 11:05:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 11:05:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2022-01-31 11:05:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:05:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-01-31 11:05:45,341 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 30 [2022-01-31 11:05:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:45,341 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-01-31 11:05:45,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-01-31 11:05:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 11:05:45,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:45,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:45,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:45,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:45,543 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash 469914145, now seen corresponding path program 1 times [2022-01-31 11:05:45,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:45,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617913328] [2022-01-31 11:05:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:45,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:45,556 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:45,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027908711] [2022-01-31 11:05:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:45,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:45,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:45,557 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) [2022-01-31 11:05:45,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 11:05:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 11:05:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:45,669 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-31 11:05:45,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 11:05:45,698 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-01-31 11:05:45,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2022-01-31 11:05:45,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:45,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 11:05:45,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:45,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-31 11:05:45,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-31 11:05:45,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-31 11:05:45,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 11:05:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:45,872 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 11:05:45,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-31 11:05:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:45,930 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 11:05:45,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-01-31 11:05:46,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:46,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:05:46,185 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-01-31 11:05:46,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 22 [2022-01-31 11:05:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:46,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:46,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:46,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617913328] [2022-01-31 11:05:46,432 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:46,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027908711] [2022-01-31 11:05:46,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027908711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:46,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:46,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-01-31 11:05:46,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728835010] [2022-01-31 11:05:46,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:46,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 11:05:46,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:46,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 11:05:46,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-31 11:05:46,434 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 11:05:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:46,559 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-01-31 11:05:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 11:05:46,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-01-31 11:05:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:46,560 INFO L225 Difference]: With dead ends: 64 [2022-01-31 11:05:46,560 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 11:05:46,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-31 11:05:46,561 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:46,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 253 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-01-31 11:05:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 11:05:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-31 11:05:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 11:05:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2022-01-31 11:05:46,566 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 34 [2022-01-31 11:05:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:46,566 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2022-01-31 11:05:46,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 11:05:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2022-01-31 11:05:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 11:05:46,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:46,567 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:46,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:46,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 11:05:46,768 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:46,769 INFO L85 PathProgramCache]: Analyzing trace with hash -777540446, now seen corresponding path program 5 times [2022-01-31 11:05:46,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:46,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814921452] [2022-01-31 11:05:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:46,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:46,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:46,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879764649] [2022-01-31 11:05:46,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:05:46,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:46,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:46,790 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) [2022-01-31 11:05:46,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 11:05:46,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 11:05:46,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:05:46,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 11:05:46,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:46,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:47,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:47,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814921452] [2022-01-31 11:05:47,073 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:47,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879764649] [2022-01-31 11:05:47,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879764649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:47,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:47,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-31 11:05:47,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720314556] [2022-01-31 11:05:47,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:47,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 11:05:47,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 11:05:47,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-01-31 11:05:47,075 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:47,452 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2022-01-31 11:05:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 11:05:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 11:05:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:47,454 INFO L225 Difference]: With dead ends: 141 [2022-01-31 11:05:47,454 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 11:05:47,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 11:05:47,455 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:47,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 171 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:05:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 11:05:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2022-01-31 11:05:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 70 states have internal predecessors, (77), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 11:05:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-01-31 11:05:47,462 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 34 [2022-01-31 11:05:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:47,462 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-01-31 11:05:47,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:05:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-01-31 11:05:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 11:05:47,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:47,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:47,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:47,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 11:05:47,664 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:47,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2091268187, now seen corresponding path program 2 times [2022-01-31 11:05:47,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:47,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31283096] [2022-01-31 11:05:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:47,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:47,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:47,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059534413] [2022-01-31 11:05:47,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:05:47,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:47,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:47,693 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) [2022-01-31 11:05:47,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 11:05:47,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:05:47,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:05:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 11:05:47,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:47,808 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-31 11:05:47,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 11:05:47,834 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-01-31 11:05:47,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2022-01-31 11:05:47,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:47,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 11:05:47,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:47,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-31 11:05:47,931 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 11:05:47,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2022-01-31 11:05:47,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-31 11:05:47,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 11:05:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,006 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 11:05:48,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-31 11:05:48,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,040 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 11:05:48,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-31 11:05:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:05:48,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:05:48,110 INFO L353 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-01-31 11:05:48,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 57 [2022-01-31 11:05:48,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,166 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 11:05:48,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 46 [2022-01-31 11:05:48,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:05:48,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:48,409 INFO L353 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-01-31 11:05:48,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 27 [2022-01-31 11:05:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:05:48,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:51,403 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_83 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_83)) (forall ((v_ArrVal_387 Int) (v_ArrVal_382 Int)) (= (let ((.cse1 (+ 8 c_main_~b~0.offset))) (select (store (let ((.cse2 (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* v_main_~i~0_83 8)) v_ArrVal_382))) (let ((.cse0 (select (store |c_#memory_int| c_main_~a~0.base .cse2) c_main_~b~0.base))) (store .cse0 .cse1 (+ (select .cse0 c_main_~b~0.offset) (select .cse2 c_main_~a~0.offset))))) (+ 16 c_main_~b~0.offset) v_ArrVal_387) .cse1)) 3)))) is different from false [2022-01-31 11:05:52,067 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_387 Int) (v_ArrVal_382 Int) (v_ArrVal_380 Int) (v_main_~i~0_83 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_83)) (= 3 (let ((.cse1 (+ 8 c_main_~b~0.offset))) (select (store (let ((.cse2 (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* c_main_~i~0 8)) v_ArrVal_380) (+ c_main_~a~0.offset (* v_main_~i~0_83 8)) v_ArrVal_382))) (let ((.cse0 (select (store |c_#memory_int| c_main_~a~0.base .cse2) c_main_~b~0.base))) (store .cse0 .cse1 (+ (select .cse2 c_main_~a~0.offset) (select .cse0 c_main_~b~0.offset))))) (+ 16 c_main_~b~0.offset) v_ArrVal_387) .cse1))))) is different from false [2022-01-31 11:05:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-01-31 11:05:52,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:52,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31283096] [2022-01-31 11:05:52,115 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:05:52,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059534413] [2022-01-31 11:05:52,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059534413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:52,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:52,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2022-01-31 11:05:52,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406180720] [2022-01-31 11:05:52,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:52,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 11:05:52,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 11:05:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=391, Unknown=3, NotChecked=82, Total=552 [2022-01-31 11:05:52,118 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 23 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 11:05:54,140 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~b~0.base) c_main_~b~0.offset) 1) (= (select (select |c_#memory_int| c_main_~a~0.base) c_main_~a~0.offset) 2) (= c_main_~a~0.offset 0) (= c_main_~b~0.offset 0) (forall ((v_main_~i~0_83 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_83)) (forall ((v_ArrVal_387 Int) (v_ArrVal_382 Int)) (= (let ((.cse1 (+ 8 c_main_~b~0.offset))) (select (store (let ((.cse2 (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* v_main_~i~0_83 8)) v_ArrVal_382))) (let ((.cse0 (select (store |c_#memory_int| c_main_~a~0.base .cse2) c_main_~b~0.base))) (store .cse0 .cse1 (+ (select .cse0 c_main_~b~0.offset) (select .cse2 c_main_~a~0.offset))))) (+ 16 c_main_~b~0.offset) v_ArrVal_387) .cse1)) 3)))) (= c_main_~i~0 1)) is different from false [2022-01-31 11:05:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:54,323 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-01-31 11:05:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 11:05:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 23 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-01-31 11:05:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:54,324 INFO L225 Difference]: With dead ends: 92 [2022-01-31 11:05:54,324 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 11:05:54,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=119, Invalid=645, Unknown=4, NotChecked=162, Total=930 [2022-01-31 11:05:54,325 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:54,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 318 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2022-01-31 11:05:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 11:05:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-01-31 11:05:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.12) internal successors, (84), 75 states have internal predecessors, (84), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 11:05:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-01-31 11:05:54,330 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 38 [2022-01-31 11:05:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:54,330 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-01-31 11:05:54,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 23 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 11:05:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-01-31 11:05:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 11:05:54,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:54,331 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:54,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 11:05:54,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 11:05:54,554 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1953775590, now seen corresponding path program 6 times [2022-01-31 11:05:54,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788906838] [2022-01-31 11:05:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:54,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:54,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:05:54,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290258066] [2022-01-31 11:05:54,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 11:05:54,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:54,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:54,580 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) [2022-01-31 11:05:54,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 11:05:54,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 11:05:54,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:05:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 11:05:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:54,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 11:05:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:54,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-31 11:05:54,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 11:05:54,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:05:54,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:05:54,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:05:54,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:05:54,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:54,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:05:54,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:54,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:05:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:54,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:05:54,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:05:54,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:05:54,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:05:54,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:05:54,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-31 11:05:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 11:05:54,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:57,079 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_90 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_90)) (forall ((v_ArrVal_457 Int)) (= (select (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1)))) is different from false [2022-01-31 11:05:59,220 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_91 Int)) (or (forall ((v_ArrVal_456 Int) (v_main_~i~0_90 Int) (v_ArrVal_457 Int)) (or (not (<= (+ v_main_~i~0_91 1) v_main_~i~0_90)) (= (select (store (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_91 8) c_main_~b~0.offset) v_ArrVal_456) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_91)))) is different from false [2022-01-31 11:06:01,286 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_456 Int) (v_ArrVal_454 Int) (v_main_~i~0_91 Int) (v_main_~i~0_90 Int) (v_ArrVal_457 Int)) (or (not (<= (+ v_main_~i~0_91 1) v_main_~i~0_90)) (= (select (store (store (store (select |c_#memory_int| c_main_~b~0.base) (+ (* c_main_~i~0 8) c_main_~b~0.offset) v_ArrVal_454) (+ (* v_main_~i~0_91 8) c_main_~b~0.offset) v_ArrVal_456) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1) (not (<= (+ c_main_~i~0 1) v_main_~i~0_91)))) is different from false [2022-01-31 11:06:03,322 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_456 Int) (v_ArrVal_454 Int) (v_main_~i~0_91 Int) (v_main_~i~0_90 Int) (v_ArrVal_457 Int)) (or (= (select (store (store (store (select |c_#memory_int| c_main_~b~0.base) (+ (* c_main_~i~0 8) 8 c_main_~b~0.offset) v_ArrVal_454) (+ (* v_main_~i~0_91 8) c_main_~b~0.offset) v_ArrVal_456) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1) (not (<= (+ c_main_~i~0 2) v_main_~i~0_91)) (not (<= (+ v_main_~i~0_91 1) v_main_~i~0_90)))) is different from false [2022-01-31 11:06:05,400 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_456 Int) (v_ArrVal_454 Int) (v_main_~i~0_91 Int) (v_main_~i~0_90 Int) (v_ArrVal_451 Int) (v_ArrVal_457 Int)) (or (not (<= (+ c_main_~i~0 2) v_main_~i~0_91)) (= (select (store (store (let ((.cse0 (* c_main_~i~0 8))) (store (store (select |c_#memory_int| c_main_~b~0.base) (+ .cse0 c_main_~b~0.offset) v_ArrVal_451) (+ .cse0 8 c_main_~b~0.offset) v_ArrVal_454)) (+ (* v_main_~i~0_91 8) c_main_~b~0.offset) v_ArrVal_456) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1) (not (<= (+ v_main_~i~0_91 1) v_main_~i~0_90)))) is different from false [2022-01-31 11:06:05,809 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_456 Int) (v_ArrVal_454 Int) (v_main_~i~0_91 Int) (v_main_~i~0_90 Int) (v_ArrVal_451 Int) (v_ArrVal_457 Int)) (or (= (select (store (store (store (store (select |c_#memory_int| c_main_~b~0.base) (+ 8 c_main_~b~0.offset) v_ArrVal_451) (+ 16 c_main_~b~0.offset) v_ArrVal_454) (+ (* v_main_~i~0_91 8) c_main_~b~0.offset) v_ArrVal_456) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1) (not (<= 3 v_main_~i~0_91)) (not (<= (+ v_main_~i~0_91 1) v_main_~i~0_90)))) is different from false [2022-01-31 11:06:05,922 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_456 Int) (v_ArrVal_454 Int) (v_main_~i~0_91 Int) (v_main_~i~0_90 Int) (v_ArrVal_451 Int) (v_ArrVal_450 (Array Int Int)) (v_ArrVal_457 Int)) (or (= (select (store (store (store (store (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_450) c_main_~b~0.base) (+ 8 c_main_~b~0.offset) v_ArrVal_451) (+ 16 c_main_~b~0.offset) v_ArrVal_454) (+ (* v_main_~i~0_91 8) c_main_~b~0.offset) v_ArrVal_456) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1) (not (<= 3 v_main_~i~0_91)) (not (<= (+ v_main_~i~0_91 1) v_main_~i~0_90)))) is different from false [2022-01-31 11:06:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 20 not checked. [2022-01-31 11:06:06,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:06:06,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788906838] [2022-01-31 11:06:06,102 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:06:06,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290258066] [2022-01-31 11:06:06,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290258066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:06:06,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:06:06,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2022-01-31 11:06:06,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766602625] [2022-01-31 11:06:06,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:06:06,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 11:06:06,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:06:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 11:06:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=221, Unknown=7, NotChecked=252, Total=552 [2022-01-31 11:06:06,104 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:06:11,058 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~b~0.base) c_main_~b~0.offset) 1) (= c_main_~b~0.offset 0) (forall ((v_main_~i~0_90 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_90)) (forall ((v_ArrVal_457 Int)) (= (select (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1)))) (forall ((v_ArrVal_456 Int) (v_ArrVal_454 Int) (v_main_~i~0_91 Int) (v_main_~i~0_90 Int) (v_ArrVal_457 Int)) (or (= (select (store (store (store (select |c_#memory_int| c_main_~b~0.base) (+ (* c_main_~i~0 8) 8 c_main_~b~0.offset) v_ArrVal_454) (+ (* v_main_~i~0_91 8) c_main_~b~0.offset) v_ArrVal_456) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1) (not (<= (+ c_main_~i~0 2) v_main_~i~0_91)) (not (<= (+ v_main_~i~0_91 1) v_main_~i~0_90)))) (= c_main_~i~0 1)) is different from false [2022-01-31 11:06:13,077 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~b~0.base) c_main_~b~0.offset) 1) (= c_main_~i~0 2) (= c_main_~b~0.offset 0) (forall ((v_main_~i~0_90 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_90)) (forall ((v_ArrVal_457 Int)) (= (select (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1)))) (forall ((v_main_~i~0_91 Int)) (or (forall ((v_ArrVal_456 Int) (v_main_~i~0_90 Int) (v_ArrVal_457 Int)) (or (not (<= (+ v_main_~i~0_91 1) v_main_~i~0_90)) (= (select (store (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_91 8) c_main_~b~0.offset) v_ArrVal_456) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_91))))) is different from false [2022-01-31 11:06:15,104 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~b~0.base) c_main_~b~0.offset) 1) (= c_main_~b~0.offset 0) (forall ((v_main_~i~0_90 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_90)) (forall ((v_ArrVal_457 Int)) (= (select (store (select |c_#memory_int| c_main_~b~0.base) (+ (* v_main_~i~0_90 8) c_main_~b~0.offset) v_ArrVal_457) c_main_~b~0.offset) 1)))) (<= 3 c_main_~i~0)) is different from false [2022-01-31 11:06:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:06:15,154 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2022-01-31 11:06:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 11:06:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-01-31 11:06:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:06:15,155 INFO L225 Difference]: With dead ends: 99 [2022-01-31 11:06:15,155 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 11:06:15,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=98, Invalid=312, Unknown=10, NotChecked=450, Total=870 [2022-01-31 11:06:15,156 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:06:15,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 277 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2022-01-31 11:06:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 11:06:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-01-31 11:06:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 80 states have internal predecessors, (88), 10 states have call successors, (10), 10 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 11:06:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2022-01-31 11:06:15,163 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 38 [2022-01-31 11:06:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:06:15,163 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2022-01-31 11:06:15,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:06:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2022-01-31 11:06:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 11:06:15,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:06:15,164 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 11:06:15,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 11:06:15,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 11:06:15,365 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:06:15,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:06:15,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1863950704, now seen corresponding path program 3 times [2022-01-31 11:06:15,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:06:15,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658944756] [2022-01-31 11:06:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:06:15,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:06:15,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:06:15,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246708768] [2022-01-31 11:06:15,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:06:15,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:06:15,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:06:15,402 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) [2022-01-31 11:06:15,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 11:06:15,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 11:06:15,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-01-31 11:06:15,475 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 11:06:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 11:06:15,513 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-31 11:06:15,514 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 11:06:15,514 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 11:06:15,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 11:06:15,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 11:06:15,742 INFO L732 BasicCegarLoop]: Path program histogram: [6, 3, 1, 1, 1, 1] [2022-01-31 11:06:15,744 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 11:06:15,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:06:15 BasicIcfg [2022-01-31 11:06:15,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 11:06:15,777 INFO L158 Benchmark]: Toolchain (without parser) took 42558.35ms. Allocated memory was 197.1MB in the beginning and 250.6MB in the end (delta: 53.5MB). Free memory was 143.5MB in the beginning and 132.4MB in the end (delta: 11.0MB). Peak memory consumption was 65.4MB. Max. memory is 8.0GB. [2022-01-31 11:06:15,777 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 11:06:15,777 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.11ms. Allocated memory is still 197.1MB. Free memory was 143.2MB in the beginning and 168.6MB in the end (delta: -25.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-31 11:06:15,777 INFO L158 Benchmark]: Boogie Preprocessor took 25.33ms. Allocated memory is still 197.1MB. Free memory was 168.6MB in the beginning and 167.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 11:06:15,777 INFO L158 Benchmark]: RCFGBuilder took 259.66ms. Allocated memory is still 197.1MB. Free memory was 167.1MB in the beginning and 155.5MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 11:06:15,777 INFO L158 Benchmark]: IcfgTransformer took 38.20ms. Allocated memory is still 197.1MB. Free memory was 155.5MB in the beginning and 154.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 11:06:15,778 INFO L158 Benchmark]: TraceAbstraction took 42032.63ms. Allocated memory was 197.1MB in the beginning and 250.6MB in the end (delta: 53.5MB). Free memory was 153.4MB in the beginning and 132.4MB in the end (delta: 21.0MB). Peak memory consumption was 75.0MB. Max. memory is 8.0GB. [2022-01-31 11:06:15,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.11ms. Allocated memory is still 197.1MB. Free memory was 143.2MB in the beginning and 168.6MB in the end (delta: -25.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.33ms. Allocated memory is still 197.1MB. Free memory was 168.6MB in the beginning and 167.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 259.66ms. Allocated memory is still 197.1MB. Free memory was 167.1MB in the beginning and 155.5MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 38.20ms. Allocated memory is still 197.1MB. Free memory was 155.5MB in the beginning and 154.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 42032.63ms. Allocated memory was 197.1MB in the beginning and 250.6MB in the end (delta: 53.5MB). Free memory was 153.4MB in the beginning and 132.4MB in the end (delta: 21.0MB). Peak memory consumption was 75.0MB. 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=6, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 2 [L32] b[0] = 1 [L33] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, N=3] [L33] COND TRUE i