/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/eqn5f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 11:07:04,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 11:07:04,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 11:07:04,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 11:07:04,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 11:07:04,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 11:07:04,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 11:07:04,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 11:07:04,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 11:07:04,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 11:07:04,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 11:07:04,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 11:07:04,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 11:07:04,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 11:07:04,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 11:07:04,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 11:07:04,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 11:07:04,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 11:07:04,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 11:07:04,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 11:07:04,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 11:07:04,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 11:07:04,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 11:07:04,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 11:07:04,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 11:07:04,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 11:07:04,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 11:07:04,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 11:07:04,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 11:07:04,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 11:07:04,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 11:07:04,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 11:07:04,746 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 11:07:04,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 11:07:04,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 11:07:04,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 11:07:04,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 11:07:04,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 11:07:04,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 11:07:04,747 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 11:07:04,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 11:07:04,747 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 11:07:04,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 11:07:04,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 11:07:04,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 11:07:04,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 11:07:04,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 11:07:04,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:07:04,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 11:07:04,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 11:07:04,749 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 11:07:04,749 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 11:07:04,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 11:07:04,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 11:07:04,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 11:07:04,924 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 11:07:04,924 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 11:07:04,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn5f.c [2022-01-31 11:07:04,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eccb70e5/238dcd441a04459891979d8a138093d1/FLAG41deaba9e [2022-01-31 11:07:05,295 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 11:07:05,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn5f.c [2022-01-31 11:07:05,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eccb70e5/238dcd441a04459891979d8a138093d1/FLAG41deaba9e [2022-01-31 11:07:05,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eccb70e5/238dcd441a04459891979d8a138093d1 [2022-01-31 11:07:05,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 11:07:05,317 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 11:07:05,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 11:07:05,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 11:07:05,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 11:07:05,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a7c49d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05, skipping insertion in model container [2022-01-31 11:07:05,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 11:07:05,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 11:07:05,454 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/eqn5f.c[588,601] [2022-01-31 11:07:05,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:07:05,500 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 11:07:05,511 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/eqn5f.c[588,601] [2022-01-31 11:07:05,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:07:05,538 INFO L208 MainTranslator]: Completed translation [2022-01-31 11:07:05,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05 WrapperNode [2022-01-31 11:07:05,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 11:07:05,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 11:07:05,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 11:07:05,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 11:07:05,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 11:07:05,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 11:07:05,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 11:07:05,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 11:07:05,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:07:05,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:05,588 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 11:07:05,595 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 11:07:05,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 11:07:05,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 11:07:05,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 11:07:05,616 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 11:07:05,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 11:07:05,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 11:07:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 11:07:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 11:07:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 11:07:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 11:07:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 11:07:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 11:07:05,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 11:07:05,618 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 11:07:05,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 11:07:05,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 11:07:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 11:07:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 11:07:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 11:07:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 11:07:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 11:07:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 11:07:05,668 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 11:07:05,669 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 11:07:05,780 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 11:07:05,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 11:07:05,784 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 11:07:05,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:07:05 BoogieIcfgContainer [2022-01-31 11:07:05,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 11:07:05,786 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 11:07:05,786 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 11:07:05,787 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 11:07:05,800 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:07:05" (1/1) ... [2022-01-31 11:07:05,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:07:05 BasicIcfg [2022-01-31 11:07:05,813 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 11:07:05,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 11:07:05,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 11:07:05,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 11:07:05,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:07:05" (1/4) ... [2022-01-31 11:07:05,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8f0493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:07:05, skipping insertion in model container [2022-01-31 11:07:05,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:07:05" (2/4) ... [2022-01-31 11:07:05,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8f0493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:07:05, skipping insertion in model container [2022-01-31 11:07:05,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:07:05" (3/4) ... [2022-01-31 11:07:05,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8f0493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:07:05, skipping insertion in model container [2022-01-31 11:07:05,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:07:05" (4/4) ... [2022-01-31 11:07:05,831 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5f.cJordan [2022-01-31 11:07:05,835 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 11:07:05,835 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 11:07:05,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 11:07:05,867 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 11:07:05,867 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 11:07:05,875 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 11:07:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 11:07:05,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:05,891 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 11:07:05,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash 683153263, now seen corresponding path program 1 times [2022-01-31 11:07:05,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:05,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996689828] [2022-01-31 11:07:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:05,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:06,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:07:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:06,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:07:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:06,085 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 11:07:06,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:06,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996689828] [2022-01-31 11:07:06,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996689828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:07:06,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:07:06,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 11:07:06,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960888643] [2022-01-31 11:07:06,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:07:06,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 11:07:06,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 11:07:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:07:06,118 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 11:07:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:06,180 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-01-31 11:07:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 11:07:06,182 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 11:07:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:06,190 INFO L225 Difference]: With dead ends: 34 [2022-01-31 11:07:06,191 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 11:07:06,192 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 11:07:06,199 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:07:06,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:07:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 11:07:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 11:07:06,225 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 11:07:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 11:07:06,226 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2022-01-31 11:07:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:06,227 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 11:07:06,228 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 11:07:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 11:07:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 11:07:06,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:06,229 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 11:07:06,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 11:07:06,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:06,230 INFO L85 PathProgramCache]: Analyzing trace with hash -530200526, now seen corresponding path program 1 times [2022-01-31 11:07:06,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:06,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781852254] [2022-01-31 11:07:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:06,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:06,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:07:06,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846355395] [2022-01-31 11:07:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:06,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:06,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:06,278 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 11:07:06,323 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 11:07:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:06,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 11:07:06,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:06,460 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-31 11:07:06,462 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 11:07:06,476 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 11:07:06,488 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 11:07:06,623 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 11:07:06,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:07:06,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:07:06,729 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 11:07:06,755 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 11:07:06,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 11:07:06,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:06,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781852254] [2022-01-31 11:07:06,757 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:07:06,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846355395] [2022-01-31 11:07:06,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846355395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:07:06,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:07:06,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 11:07:06,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480580100] [2022-01-31 11:07:06,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:07:06,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 11:07:06,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:06,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 11:07:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 11:07:06,764 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 11:07:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:06,825 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-01-31 11:07:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 11:07:06,825 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 11:07:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:06,827 INFO L225 Difference]: With dead ends: 45 [2022-01-31 11:07:06,827 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 11:07:06,827 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 11:07:06,828 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:07:06,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:07:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 11:07:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-01-31 11:07:06,833 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 11:07:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-01-31 11:07:06,834 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2022-01-31 11:07:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:06,834 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-01-31 11:07:06,834 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 11:07:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-01-31 11:07:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 11:07:06,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:06,835 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 11:07:06,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 11:07:07,051 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 11:07:07,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash 308115632, now seen corresponding path program 1 times [2022-01-31 11:07:07,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:07,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585979894] [2022-01-31 11:07:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:07,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:07,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:07:07,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921598494] [2022-01-31 11:07:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:07,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:07,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:07,066 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 11:07:07,069 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 11:07:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:07,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 11:07:07,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:07,178 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 11:07:07,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 11:07:07,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:07,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585979894] [2022-01-31 11:07:07,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:07:07,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921598494] [2022-01-31 11:07:07,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921598494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:07:07,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:07:07,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 11:07:07,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569218611] [2022-01-31 11:07:07,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:07:07,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 11:07:07,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:07,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 11:07:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 11:07:07,181 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 11:07:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:07,232 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-01-31 11:07:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 11:07:07,232 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 11:07:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:07,234 INFO L225 Difference]: With dead ends: 58 [2022-01-31 11:07:07,234 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 11:07:07,234 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 11:07:07,235 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 11:07:07,235 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 11:07:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 11:07:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2022-01-31 11:07:07,248 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 11:07:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-31 11:07:07,249 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2022-01-31 11:07:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:07,250 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-31 11:07:07,250 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 11:07:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-31 11:07:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 11:07:07,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:07,251 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 11:07:07,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 11:07:07,459 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 11:07:07,460 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1912898706, now seen corresponding path program 1 times [2022-01-31 11:07:07,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:07,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317360499] [2022-01-31 11:07:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:07,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:07,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:07:07,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160430318] [2022-01-31 11:07:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:07,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:07,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:07,475 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 11:07:07,476 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 11:07:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 11:07:07,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:07,561 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 11:07:07,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:07:07,614 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 11:07:07,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:07,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317360499] [2022-01-31 11:07:07,615 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:07:07,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160430318] [2022-01-31 11:07:07,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160430318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:07:07,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:07:07,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-01-31 11:07:07,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876068584] [2022-01-31 11:07:07,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:07:07,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 11:07:07,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:07,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 11:07:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 11:07:07,616 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 11:07:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:07,697 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-01-31 11:07:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 11:07:07,697 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 11:07:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:07,698 INFO L225 Difference]: With dead ends: 55 [2022-01-31 11:07:07,698 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 11:07:07,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-31 11:07:07,699 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 11:07:07,699 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 11:07:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 11:07:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-01-31 11:07:07,702 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 11:07:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-01-31 11:07:07,702 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2022-01-31 11:07:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:07,703 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-01-31 11:07:07,703 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 11:07:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-01-31 11:07:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 11:07:07,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:07,703 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 11:07:07,723 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 11:07:07,918 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 11:07:07,919 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:07,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1319940884, now seen corresponding path program 1 times [2022-01-31 11:07:07,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:07,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047813374] [2022-01-31 11:07:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:07,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:07,931 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:07:07,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587550147] [2022-01-31 11:07:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:07,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:07,932 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 11:07:07,933 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 11:07:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:07,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 11:07:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:08,013 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 11:07:08,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:07:08,019 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 11:07:08,021 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 11:07:08,041 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 11:07:08,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:07:08,081 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 11:07:08,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:07:08,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:07:08,121 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 11:07:08,142 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 11:07:08,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:07:08,239 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 11:07:08,284 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 11:07:08,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:08,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047813374] [2022-01-31 11:07:08,285 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:07:08,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587550147] [2022-01-31 11:07:08,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587550147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:07:08,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:07:08,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-31 11:07:08,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930830675] [2022-01-31 11:07:08,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:07:08,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 11:07:08,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 11:07:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=123, Unknown=1, NotChecked=22, Total=182 [2022-01-31 11:07:08,288 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 11:07:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:08,391 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-01-31 11:07:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 11:07:08,391 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 11:07:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:08,392 INFO L225 Difference]: With dead ends: 63 [2022-01-31 11:07:08,392 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 11:07:08,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=188, Unknown=1, NotChecked=28, Total=272 [2022-01-31 11:07:08,393 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 11:07:08,393 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 11:07:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 11:07:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2022-01-31 11:07:08,396 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 11:07:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-01-31 11:07:08,396 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2022-01-31 11:07:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:08,398 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-01-31 11:07:08,398 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 11:07:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-01-31 11:07:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 11:07:08,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:08,399 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 11:07:08,427 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 11:07:08,612 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 11:07:08,612 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1576842986, now seen corresponding path program 2 times [2022-01-31 11:07:08,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:08,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564558907] [2022-01-31 11:07:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:08,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:08,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:07:08,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324263254] [2022-01-31 11:07:08,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:07:08,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:08,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:08,640 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 11:07:08,641 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 11:07:08,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:07:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:07:08,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:07:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:08,750 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 11:07:08,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:07:08,803 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 11:07:08,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:08,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564558907] [2022-01-31 11:07:08,804 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:07:08,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324263254] [2022-01-31 11:07:08,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324263254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:07:08,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:07:08,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 11:07:08,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978946580] [2022-01-31 11:07:08,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:07:08,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:07:08,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:08,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:07:08,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:07:08,805 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 11:07:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:08,934 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-01-31 11:07:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 11:07:08,935 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 11:07:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:08,937 INFO L225 Difference]: With dead ends: 76 [2022-01-31 11:07:08,937 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 11:07:08,937 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 11:07:08,938 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 11:07:08,939 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 11:07:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 11:07:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2022-01-31 11:07:08,951 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 11:07:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-01-31 11:07:08,954 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 28 [2022-01-31 11:07:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:08,955 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-01-31 11:07:08,955 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 11:07:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-01-31 11:07:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 11:07:08,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:08,957 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 11:07:08,974 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 11:07:09,157 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 11:07:09,158 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1780810280, now seen corresponding path program 3 times [2022-01-31 11:07:09,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:09,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458384881] [2022-01-31 11:07:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:09,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:09,171 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:07:09,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622656566] [2022-01-31 11:07:09,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:07:09,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:09,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:09,173 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 11:07:09,174 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 11:07:09,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 11:07:09,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:07:09,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:07:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:09,281 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 11:07:09,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:07:09,327 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 11:07:09,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:09,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458384881] [2022-01-31 11:07:09,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:07:09,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622656566] [2022-01-31 11:07:09,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622656566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:07:09,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:07:09,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 11:07:09,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222523700] [2022-01-31 11:07:09,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:07:09,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:07:09,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:09,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:07:09,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:07:09,328 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 11:07:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:09,440 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-01-31 11:07:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 11:07:09,440 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 11:07:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:09,441 INFO L225 Difference]: With dead ends: 65 [2022-01-31 11:07:09,441 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 11:07:09,441 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 11:07:09,441 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 11:07:09,442 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 11:07:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 11:07:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2022-01-31 11:07:09,444 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 11:07:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-01-31 11:07:09,444 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 28 [2022-01-31 11:07:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:09,444 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-01-31 11:07:09,444 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 11:07:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-01-31 11:07:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 11:07:09,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:09,445 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 11:07:09,462 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 11:07:09,662 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 11:07:09,662 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:09,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash 691408166, now seen corresponding path program 4 times [2022-01-31 11:07:09,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:09,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365079001] [2022-01-31 11:07:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:09,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:09,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:07:09,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258691086] [2022-01-31 11:07:09,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:07:09,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:09,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:09,677 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 11:07:09,691 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 11:07:09,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:07:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:07:09,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 11:07:09,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:09,780 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-31 11:07:09,780 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 11:07:09,785 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 11:07:09,789 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 11:07:09,807 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 11:07:09,823 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 11:07:09,846 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 11:07:09,864 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 11:07:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:07:09,899 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 11:07:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:07:09,925 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 11:07:09,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:07:09,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:07:09,954 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 11:07:09,976 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 11:07:09,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:07:12,063 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 11:07:12,366 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 11:07:12,397 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 11:07:12,447 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 11:07:12,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365079001] [2022-01-31 11:07:12,447 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:07:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258691086] [2022-01-31 11:07:12,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258691086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:07:12,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:07:12,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2022-01-31 11:07:12,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845383328] [2022-01-31 11:07:12,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:07:12,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 11:07:12,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 11:07:12,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=168, Unknown=3, NotChecked=84, Total=306 [2022-01-31 11:07:12,449 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 11:07:14,525 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 11:07:16,551 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 11:07:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:16,683 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-01-31 11:07:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 11:07:16,684 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 11:07:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:16,684 INFO L225 Difference]: With dead ends: 76 [2022-01-31 11:07:16,685 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 11:07:16,685 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 11:07:16,685 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 11:07:16,685 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 11:07:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 11:07:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2022-01-31 11:07:16,688 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 11:07:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-01-31 11:07:16,689 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 30 [2022-01-31 11:07:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:16,689 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-01-31 11:07:16,689 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 11:07:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-01-31 11:07:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 11:07:16,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:16,689 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 11:07:16,714 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 11:07:16,895 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 11:07:16,895 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:16,896 INFO L85 PathProgramCache]: Analyzing trace with hash 469914145, now seen corresponding path program 1 times [2022-01-31 11:07:16,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:16,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906050511] [2022-01-31 11:07:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:16,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:16,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:07:16,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837801485] [2022-01-31 11:07:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:16,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:16,917 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 11:07:16,918 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 11:07:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 11:07:16,969 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 11:07:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 11:07:16,999 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-31 11:07:16,999 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 11:07:17,000 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 11:07:17,019 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 11:07:17,201 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 11:07:17,204 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2022-01-31 11:07:17,206 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 11:07:17,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:07:17 BasicIcfg [2022-01-31 11:07:17,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 11:07:17,227 INFO L158 Benchmark]: Toolchain (without parser) took 11910.40ms. Allocated memory was 185.6MB in the beginning and 266.3MB in the end (delta: 80.7MB). Free memory was 130.1MB in the beginning and 222.5MB in the end (delta: -92.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 11:07:17,227 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 185.6MB. Free memory is still 146.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 11:07:17,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.45ms. Allocated memory was 185.6MB in the beginning and 266.3MB in the end (delta: 80.7MB). Free memory was 130.0MB in the beginning and 238.3MB in the end (delta: -108.3MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. [2022-01-31 11:07:17,228 INFO L158 Benchmark]: Boogie Preprocessor took 23.06ms. Allocated memory is still 266.3MB. Free memory was 238.3MB in the beginning and 236.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 11:07:17,228 INFO L158 Benchmark]: RCFGBuilder took 222.34ms. Allocated memory is still 266.3MB. Free memory was 236.8MB in the beginning and 223.6MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-01-31 11:07:17,228 INFO L158 Benchmark]: IcfgTransformer took 27.77ms. Allocated memory is still 266.3MB. Free memory was 223.6MB in the beginning and 222.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 11:07:17,228 INFO L158 Benchmark]: TraceAbstraction took 11399.84ms. Allocated memory is still 266.3MB. Free memory was 222.1MB in the beginning and 222.5MB in the end (delta: -400.1kB). Peak memory consumption was 1.2MB. Max. memory is 8.0GB. [2022-01-31 11:07:17,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 185.6MB. Free memory is still 146.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.45ms. Allocated memory was 185.6MB in the beginning and 266.3MB in the end (delta: 80.7MB). Free memory was 130.0MB in the beginning and 238.3MB in the end (delta: -108.3MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.06ms. Allocated memory is still 266.3MB. Free memory was 238.3MB in the beginning and 236.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 222.34ms. Allocated memory is still 266.3MB. Free memory was 236.8MB in the beginning and 223.6MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 27.77ms. Allocated memory is still 266.3MB. Free memory was 223.6MB in the beginning and 222.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 11399.84ms. Allocated memory is still 266.3MB. Free memory was 222.1MB in the beginning and 222.5MB in the end (delta: -400.1kB). Peak memory consumption was 1.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, N=2] [L33] COND TRUE i