/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 00:54:32,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 00:54:32,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 00:54:32,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 00:54:32,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 00:54:32,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 00:54:32,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 00:54:32,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 00:54:32,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 00:54:32,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 00:54:32,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 00:54:32,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 00:54:32,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 00:54:32,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 00:54:32,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 00:54:32,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 00:54:32,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 00:54:32,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 00:54:32,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 00:54:32,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 00:54:32,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 00:54:32,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 00:54:32,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 00:54:32,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 00:54:32,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 00:54:32,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 00:54:32,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 00:54:32,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 00:54:32,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 00:54:32,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 00:54:32,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 00:54:32,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 00:54:32,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 00:54:32,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 00:54:32,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 00:54:32,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 00:54:32,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 00:54:32,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 00:54:32,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 00:54:32,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 00:54:32,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 00:54:32,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 00:54:32,843 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 00:54:32,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 00:54:32,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 00:54:32,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 00:54:32,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 00:54:32,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 00:54:32,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 00:54:32,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 00:54:32,844 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 00:54:32,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 00:54:32,844 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 00:54:32,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 00:54:32,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 00:54:32,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 00:54:32,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 00:54:33,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 00:54:33,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 00:54:33,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 00:54:33,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 00:54:33,048 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 00:54:33,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn1.c [2022-01-31 00:54:33,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237a48db8/fb3c049199d24f45b8a95212813ab4a4/FLAGa61994971 [2022-01-31 00:54:33,409 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 00:54:33,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn1.c [2022-01-31 00:54:33,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237a48db8/fb3c049199d24f45b8a95212813ab4a4/FLAGa61994971 [2022-01-31 00:54:33,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237a48db8/fb3c049199d24f45b8a95212813ab4a4 [2022-01-31 00:54:33,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 00:54:33,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 00:54:33,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 00:54:33,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 00:54:33,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 00:54:33,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f88e740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33, skipping insertion in model container [2022-01-31 00:54:33,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 00:54:33,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 00:54:33,550 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/eqn1.c[587,600] [2022-01-31 00:54:33,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 00:54:33,569 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 00:54:33,579 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/eqn1.c[587,600] [2022-01-31 00:54:33,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 00:54:33,599 INFO L208 MainTranslator]: Completed translation [2022-01-31 00:54:33,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33 WrapperNode [2022-01-31 00:54:33,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 00:54:33,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 00:54:33,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 00:54:33,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 00:54:33,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 00:54:33,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 00:54:33,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 00:54:33,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 00:54:33,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (1/1) ... [2022-01-31 00:54:33,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 00:54:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:33,660 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 00:54:33,666 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 00:54:33,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 00:54:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 00:54:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 00:54:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 00:54:33,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 00:54:33,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 00:54:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 00:54:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 00:54:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 00:54:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 00:54:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 00:54:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 00:54:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 00:54:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 00:54:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 00:54:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 00:54:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 00:54:33,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 00:54:33,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 00:54:33,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 00:54:33,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 00:54:33,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 00:54:33,740 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 00:54:33,741 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 00:54:33,833 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 00:54:33,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 00:54:33,837 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 00:54:33,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:54:33 BoogieIcfgContainer [2022-01-31 00:54:33,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 00:54:33,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 00:54:33,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 00:54:33,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 00:54:33,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:54:33" (1/3) ... [2022-01-31 00:54:33,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4040968f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:54:33, skipping insertion in model container [2022-01-31 00:54:33,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:54:33" (2/3) ... [2022-01-31 00:54:33,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4040968f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:54:33, skipping insertion in model container [2022-01-31 00:54:33,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:54:33" (3/3) ... [2022-01-31 00:54:33,844 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn1.c [2022-01-31 00:54:33,847 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 00:54:33,847 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 00:54:33,877 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 00:54:33,881 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 00:54:33,881 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 00:54:33,903 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 00:54:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 00:54:33,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:33,908 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 00:54:33,909 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash 199879945, now seen corresponding path program 1 times [2022-01-31 00:54:33,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:33,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037933151] [2022-01-31 00:54:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:33,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:54:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:34,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:54:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:34,100 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 00:54:34,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037933151] [2022-01-31 00:54:34,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037933151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:54:34,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:54:34,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 00:54:34,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765105623] [2022-01-31 00:54:34,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:54:34,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 00:54:34,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 00:54:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 00:54:34,126 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 00:54:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:34,174 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-01-31 00:54:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 00:54:34,176 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 00:54:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:34,180 INFO L225 Difference]: With dead ends: 58 [2022-01-31 00:54:34,180 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 00:54:34,182 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 00:54:34,185 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 00:54:34,186 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 00:54:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 00:54:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 00:54:34,207 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 00:54:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 00:54:34,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2022-01-31 00:54:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:34,208 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 00:54:34,209 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 00:54:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 00:54:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 00:54:34,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:34,210 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 00:54:34,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 00:54:34,211 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash -386926069, now seen corresponding path program 1 times [2022-01-31 00:54:34,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:34,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037322622] [2022-01-31 00:54:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:34,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:34,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:34,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583028290] [2022-01-31 00:54:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:34,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:34,259 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 00:54:34,260 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 00:54:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:34,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 00:54:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:34,434 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-31 00:54:34,435 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 00:54:34,441 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 00:54:34,450 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 00:54:34,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 00:54:34,569 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 00:54:34,610 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-31 00:54:34,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-01-31 00:54:34,637 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 00:54:34,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 00:54:34,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037322622] [2022-01-31 00:54:34,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:54:34,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583028290] [2022-01-31 00:54:34,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583028290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:54:34,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:54:34,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 00:54:34,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500743411] [2022-01-31 00:54:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:54:34,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 00:54:34,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:34,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 00:54:34,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 00:54:34,640 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 00:54:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:34,725 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-01-31 00:54:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 00:54:34,726 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 00:54:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:34,728 INFO L225 Difference]: With dead ends: 47 [2022-01-31 00:54:34,728 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 00:54:34,729 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 00:54:34,731 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:34,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:54:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 00:54:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-01-31 00:54:34,747 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 00:54:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-01-31 00:54:34,747 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2022-01-31 00:54:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:34,748 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-01-31 00:54:34,748 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 00:54:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-01-31 00:54:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 00:54:34,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:34,748 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 00:54:34,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 00:54:34,949 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 00:54:34,949 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1765590153, now seen corresponding path program 1 times [2022-01-31 00:54:34,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:34,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796668138] [2022-01-31 00:54:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:34,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:34,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:34,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615607836] [2022-01-31 00:54:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:34,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:34,980 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 00:54:34,981 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 00:54:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 00:54:35,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:35,100 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 00:54:35,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 00:54:35,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:35,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796668138] [2022-01-31 00:54:35,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:54:35,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615607836] [2022-01-31 00:54:35,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615607836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:54:35,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:54:35,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 00:54:35,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987656921] [2022-01-31 00:54:35,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:54:35,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 00:54:35,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:35,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 00:54:35,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 00:54:35,103 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 00:54:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:35,169 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-01-31 00:54:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 00:54:35,169 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 00:54:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:35,174 INFO L225 Difference]: With dead ends: 71 [2022-01-31 00:54:35,174 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 00:54:35,175 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 00:54:35,177 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:35,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 68 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 00:54:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 00:54:35,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2022-01-31 00:54:35,193 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 00:54:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-31 00:54:35,194 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2022-01-31 00:54:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:35,194 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-31 00:54:35,194 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 00:54:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-31 00:54:35,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 00:54:35,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:35,195 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 00:54:35,215 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 00:54:35,409 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 00:54:35,410 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:35,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1858974921, now seen corresponding path program 1 times [2022-01-31 00:54:35,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:35,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366470151] [2022-01-31 00:54:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:35,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:35,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:35,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703169551] [2022-01-31 00:54:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:35,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:35,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:35,432 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 00:54:35,433 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 00:54:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 00:54:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:35,523 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 00:54:35,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:54:35,561 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 00:54:35,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:35,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366470151] [2022-01-31 00:54:35,562 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:54:35,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703169551] [2022-01-31 00:54:35,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703169551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:54:35,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:54:35,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-01-31 00:54:35,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479659903] [2022-01-31 00:54:35,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:54:35,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 00:54:35,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 00:54:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 00:54:35,564 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 00:54:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:35,657 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-01-31 00:54:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 00:54:35,657 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 00:54:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:35,660 INFO L225 Difference]: With dead ends: 66 [2022-01-31 00:54:35,660 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 00:54:35,660 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 00:54:35,661 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:35,661 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 00:54:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 00:54:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-01-31 00:54:35,664 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 00:54:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-01-31 00:54:35,665 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2022-01-31 00:54:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:35,665 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-01-31 00:54:35,665 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 00:54:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-01-31 00:54:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 00:54:35,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:35,666 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 00:54:35,682 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 00:54:35,866 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 00:54:35,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash -292108345, now seen corresponding path program 1 times [2022-01-31 00:54:35,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563186025] [2022-01-31 00:54:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:35,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:35,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:35,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473532978] [2022-01-31 00:54:35,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:35,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:35,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:35,902 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 00:54:35,903 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 00:54:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:35,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 00:54:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:35,998 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 00:54:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:36,003 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 00:54:36,005 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 00:54:36,023 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 00:54:36,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:36,067 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 00:54:36,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:36,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:54:36,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 00:54:36,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 27 [2022-01-31 00:54:36,144 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 00:54:36,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:54:36,320 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 00:54:36,390 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 00:54:36,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:36,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563186025] [2022-01-31 00:54:36,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:54:36,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473532978] [2022-01-31 00:54:36,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473532978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:54:36,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:54:36,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-31 00:54:36,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561461301] [2022-01-31 00:54:36,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:54:36,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 00:54:36,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 00:54:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=123, Unknown=1, NotChecked=22, Total=182 [2022-01-31 00:54:36,392 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 00:54:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:36,509 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-01-31 00:54:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 00:54:36,510 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 00:54:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:36,511 INFO L225 Difference]: With dead ends: 65 [2022-01-31 00:54:36,511 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 00:54:36,511 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 00:54:36,511 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:36,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 219 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-01-31 00:54:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 00:54:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2022-01-31 00:54:36,516 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 00:54:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-01-31 00:54:36,517 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2022-01-31 00:54:36,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:36,517 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-01-31 00:54:36,517 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 00:54:36,517 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-01-31 00:54:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 00:54:36,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:36,518 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 00:54:36,539 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 00:54:36,730 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 00:54:36,730 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1603857595, now seen corresponding path program 2 times [2022-01-31 00:54:36,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:36,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085904425] [2022-01-31 00:54:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:36,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:36,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:36,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901469553] [2022-01-31 00:54:36,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 00:54:36,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:36,754 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 00:54:36,755 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 00:54:36,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 00:54:36,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:54:36,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 00:54:36,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:36,862 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 00:54:36,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:54:36,909 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 00:54:36,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:36,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085904425] [2022-01-31 00:54:36,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:54:36,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901469553] [2022-01-31 00:54:36,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901469553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:54:36,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:54:36,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 00:54:36,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667423789] [2022-01-31 00:54:36,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:54:36,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 00:54:36,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:36,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 00:54:36,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 00:54:36,912 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 00:54:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:37,049 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-01-31 00:54:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 00:54:37,049 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 00:54:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:37,050 INFO L225 Difference]: With dead ends: 89 [2022-01-31 00:54:37,050 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 00:54:37,051 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 00:54:37,051 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:37,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 82 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:54:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 00:54:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2022-01-31 00:54:37,056 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 00:54:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-01-31 00:54:37,056 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 28 [2022-01-31 00:54:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:37,057 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-01-31 00:54:37,057 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 00:54:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-01-31 00:54:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 00:54:37,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:37,057 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 00:54:37,085 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 00:54:37,271 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 00:54:37,271 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2055408763, now seen corresponding path program 3 times [2022-01-31 00:54:37,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:37,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463775019] [2022-01-31 00:54:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:37,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:37,288 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:37,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804147259] [2022-01-31 00:54:37,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 00:54:37,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:37,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:37,289 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 00:54:37,291 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 00:54:37,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 00:54:37,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:54:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 00:54:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:37,408 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 00:54:37,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:54:37,458 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 00:54:37,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463775019] [2022-01-31 00:54:37,458 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:54:37,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804147259] [2022-01-31 00:54:37,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804147259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:54:37,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:54:37,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 00:54:37,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786831581] [2022-01-31 00:54:37,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:54:37,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 00:54:37,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:37,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 00:54:37,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 00:54:37,460 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 00:54:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:37,580 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-01-31 00:54:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 00:54:37,581 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 00:54:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:37,581 INFO L225 Difference]: With dead ends: 76 [2022-01-31 00:54:37,581 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 00:54:37,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-31 00:54:37,582 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:37,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 94 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:54:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 00:54:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2022-01-31 00:54:37,586 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 00:54:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-01-31 00:54:37,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 28 [2022-01-31 00:54:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:37,587 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-01-31 00:54:37,587 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 00:54:37,587 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-01-31 00:54:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 00:54:37,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:37,588 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 00:54:37,607 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 00:54:37,788 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 00:54:37,789 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:37,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:37,789 INFO L85 PathProgramCache]: Analyzing trace with hash 376522627, now seen corresponding path program 4 times [2022-01-31 00:54:37,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:37,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625702172] [2022-01-31 00:54:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:37,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:37,805 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:37,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671817900] [2022-01-31 00:54:37,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 00:54:37,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:37,807 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 00:54:37,808 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 00:54:37,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 00:54:37,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:54:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 00:54:37,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:38,014 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 00:54:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:38,020 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 00:54:38,022 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 00:54:38,038 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 00:54:38,056 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 00:54:38,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 57 treesize of output 50 [2022-01-31 00:54:38,108 INFO L353 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-01-31 00:54:38,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 49 treesize of output 61 [2022-01-31 00:54:38,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 00:54:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:38,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 00:54:38,146 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 00:54:38,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 00:54:38,170 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-31 00:54:38,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-01-31 00:54:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:38,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:54:38,449 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_242 (Array Int Int))) (= (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_242) c_main_~b~0.base) c_main_~b~0.offset) 1)) is different from false [2022-01-31 00:54:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-01-31 00:54:38,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:38,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625702172] [2022-01-31 00:54:38,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:54:38,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671817900] [2022-01-31 00:54:38,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671817900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:54:38,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:54:38,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-01-31 00:54:38,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205287128] [2022-01-31 00:54:38,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:54:38,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 00:54:38,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 00:54:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=188, Unknown=1, NotChecked=28, Total=272 [2022-01-31 00:54:38,479 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 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 00:54:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:38,657 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2022-01-31 00:54:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 00:54:38,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 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 00:54:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:38,662 INFO L225 Difference]: With dead ends: 78 [2022-01-31 00:54:38,662 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 00:54:38,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=365, Unknown=1, NotChecked=40, Total=506 [2022-01-31 00:54:38,663 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:38,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 205 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 154 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-01-31 00:54:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 00:54:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2022-01-31 00:54:38,668 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 00:54:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-01-31 00:54:38,669 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 30 [2022-01-31 00:54:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:38,669 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-01-31 00:54:38,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 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 00:54:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-01-31 00:54:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 00:54:38,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:38,670 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 00:54:38,679 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 00:54:38,877 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 00:54:38,877 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:38,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2143768931, now seen corresponding path program 1 times [2022-01-31 00:54:38,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:38,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062954234] [2022-01-31 00:54:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:38,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:38,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:38,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673918198] [2022-01-31 00:54:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:38,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:38,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:38,889 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 00:54:38,890 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 00:54:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 00:54:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:39,008 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-31 00:54:39,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 00:54:39,011 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-01-31 00:54:39,031 INFO L353 Elim1Store]: treesize reduction 23, result has 54.0 percent of original size [2022-01-31 00:54:39,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 69 [2022-01-31 00:54:39,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 00:54:39,075 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 00:54:39,085 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 00:54:39,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:39,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 00:54:39,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-31 00:54:39,122 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 00:54:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:39,158 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 00:54:39,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-31 00:54:39,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:39,215 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 00:54:39,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-01-31 00:54:39,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:39,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:39,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:54:39,419 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-01-31 00:54:39,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 39 [2022-01-31 00:54:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:39,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:54:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:39,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062954234] [2022-01-31 00:54:39,883 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:54:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673918198] [2022-01-31 00:54:39,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673918198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:54:39,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:54:39,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-01-31 00:54:39,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330257151] [2022-01-31 00:54:39,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:54:39,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 00:54:39,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:39,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 00:54:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-31 00:54:39,887 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 00:54:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:40,228 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-01-31 00:54:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 00:54:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-01-31 00:54:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:40,229 INFO L225 Difference]: With dead ends: 65 [2022-01-31 00:54:40,229 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 00:54:40,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-01-31 00:54:40,230 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:40,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 273 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-01-31 00:54:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 00:54:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-31 00:54:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 00:54:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2022-01-31 00:54:40,236 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 34 [2022-01-31 00:54:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:40,236 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2022-01-31 00:54:40,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 00:54:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2022-01-31 00:54:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 00:54:40,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:40,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:54:40,257 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 00:54:40,454 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 00:54:40,455 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:40,456 INFO L85 PathProgramCache]: Analyzing trace with hash -768689921, now seen corresponding path program 5 times [2022-01-31 00:54:40,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:40,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100260400] [2022-01-31 00:54:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:40,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:40,477 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:54:40,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993111467] [2022-01-31 00:54:40,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 00:54:40,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:40,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:40,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 00:54:40,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 00:55:00,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 00:55:00,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:55:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 00:55:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:55:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:55:00,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:55:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:55:00,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:55:00,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100260400] [2022-01-31 00:55:00,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:55:00,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993111467] [2022-01-31 00:55:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993111467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:55:00,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:55:00,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-31 00:55:00,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210718297] [2022-01-31 00:55:00,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:55:00,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 00:55:00,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:55:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 00:55:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-01-31 00:55:00,712 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:55:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:55:01,031 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2022-01-31 00:55:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 00:55:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 00:55:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:55:01,032 INFO L225 Difference]: With dead ends: 163 [2022-01-31 00:55:01,032 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 00:55:01,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 00:55:01,033 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 00:55:01,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 174 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 00:55:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 00:55:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2022-01-31 00:55:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 70 states have internal predecessors, (77), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 00:55:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-01-31 00:55:01,041 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 34 [2022-01-31 00:55:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:55:01,041 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-01-31 00:55:01,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:55:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-01-31 00:55:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 00:55:01,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:55:01,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:55:01,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 00:55:01,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 00:55:01,242 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:55:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:55:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash 56996441, now seen corresponding path program 2 times [2022-01-31 00:55:01,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:55:01,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458401849] [2022-01-31 00:55:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:55:01,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:55:01,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:55:01,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577840636] [2022-01-31 00:55:01,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 00:55:01,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:55:01,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:55:01,259 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 00:55:01,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 00:55:01,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 00:55:01,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:55:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 00:55:01,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:55:01,560 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-31 00:55:01,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 00:55:01,565 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-01-31 00:55:01,587 INFO L353 Elim1Store]: treesize reduction 23, result has 54.0 percent of original size [2022-01-31 00:55:01,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 69 [2022-01-31 00:55:01,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 00:55:01,648 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 00:55:01,659 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 00:55:01,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-31 00:55:01,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-31 00:55:01,704 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 00:55:01,757 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:55:01,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2022-01-31 00:55:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:01,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 133 [2022-01-31 00:55:01,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 54 [2022-01-31 00:55:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,865 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 00:55:01,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2022-01-31 00:55:01,953 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:55:01,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 152 [2022-01-31 00:55:01,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:01,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 155 [2022-01-31 00:55:02,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:02,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:02,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:02,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 48 [2022-01-31 00:55:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:02,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:02,109 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-31 00:55:02,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 56 [2022-01-31 00:55:04,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:04,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:04,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:04,053 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-01-31 00:55:04,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 41 [2022-01-31 00:55:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:55:04,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:55:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:55:15,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:55:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458401849] [2022-01-31 00:55:15,352 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:55:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577840636] [2022-01-31 00:55:15,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577840636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:55:15,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:55:15,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2022-01-31 00:55:15,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817648692] [2022-01-31 00:55:15,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:55:15,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 00:55:15,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:55:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 00:55:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=504, Unknown=7, NotChecked=0, Total=600 [2022-01-31 00:55:15,354 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 00:55:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:55:19,923 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2022-01-31 00:55:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 00:55:19,924 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-01-31 00:55:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:55:19,925 INFO L225 Difference]: With dead ends: 107 [2022-01-31 00:55:19,925 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 00:55:19,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=157, Invalid=890, Unknown=9, NotChecked=0, Total=1056 [2022-01-31 00:55:19,926 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:55:19,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 339 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2022-01-31 00:55:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 00:55:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2022-01-31 00:55:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.1125) internal successors, (89), 83 states have internal predecessors, (89), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 00:55:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-01-31 00:55:19,935 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 38 [2022-01-31 00:55:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:55:19,935 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-01-31 00:55:19,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 00:55:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-01-31 00:55:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 00:55:19,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:55:19,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:55:19,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 00:55:20,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 00:55:20,158 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:55:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:55:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1202543867, now seen corresponding path program 6 times [2022-01-31 00:55:20,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:55:20,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362545781] [2022-01-31 00:55:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:55:20,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:55:20,177 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:55:20,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468919415] [2022-01-31 00:55:20,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 00:55:20,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:55:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:55:20,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 00:55:20,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 00:55:21,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 00:55:21,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:55:21,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-31 00:55:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:55:21,725 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 00:55:21,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,729 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 00:55:21,731 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 00:55:21,752 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 00:55:21,778 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 00:55:21,806 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 00:55:21,828 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 00:55:21,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 57 treesize of output 50 [2022-01-31 00:55:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 00:55:21,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 00:55:21,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 57 treesize of output 50 [2022-01-31 00:55:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 00:55:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:21,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2022-01-31 00:55:22,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 57 treesize of output 50 [2022-01-31 00:55:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 00:55:22,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 00:55:22,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 57 treesize of output 50 [2022-01-31 00:55:22,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 00:55:22,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2022-01-31 00:55:22,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:22,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:22,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 00:55:22,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 27 [2022-01-31 00:55:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 00:55:22,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:55:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 00:55:23,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:55:23,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362545781] [2022-01-31 00:55:23,212 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:55:23,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468919415] [2022-01-31 00:55:23,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468919415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:55:23,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:55:23,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2022-01-31 00:55:23,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242676631] [2022-01-31 00:55:23,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:55:23,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 00:55:23,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:55:23,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 00:55:23,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 00:55:23,214 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 35 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 00:55:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:55:24,200 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2022-01-31 00:55:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 00:55:24,200 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-01-31 00:55:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:55:24,201 INFO L225 Difference]: With dead ends: 133 [2022-01-31 00:55:24,201 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 00:55:24,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=478, Invalid=2278, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 00:55:24,203 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 00:55:24,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 213 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 331 Invalid, 0 Unknown, 245 Unchecked, 0.3s Time] [2022-01-31 00:55:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 00:55:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 109. [2022-01-31 00:55:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 93 states have internal predecessors, (104), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 00:55:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2022-01-31 00:55:24,216 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 38 [2022-01-31 00:55:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:55:24,216 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2022-01-31 00:55:24,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 00:55:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2022-01-31 00:55:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 00:55:24,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:55:24,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:55:24,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 00:55:24,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 00:55:24,421 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:55:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:55:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash -330340331, now seen corresponding path program 3 times [2022-01-31 00:55:24,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:55:24,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309756912] [2022-01-31 00:55:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:55:24,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:55:24,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:55:24,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369110978] [2022-01-31 00:55:24,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 00:55:24,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:55:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:55:24,439 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 00:55:24,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 00:55:24,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 00:55:24,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:55:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-31 00:55:24,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:55:24,892 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-31 00:55:24,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 00:55:24,917 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-01-31 00:55:24,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2022-01-31 00:55:24,922 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 00:55:24,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 00:55:24,960 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 00:55:24,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:24,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-31 00:55:24,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-31 00:55:24,987 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 00:55:25,010 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 00:55:25,076 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:55:25,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2022-01-31 00:55:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:25,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 133 [2022-01-31 00:55:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 93 [2022-01-31 00:55:25,209 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:55:25,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 154 treesize of output 142 [2022-01-31 00:55:25,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 164 [2022-01-31 00:55:25,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 73 [2022-01-31 00:55:25,413 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:55:25,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 80 [2022-01-31 00:55:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 97 [2022-01-31 00:55:25,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 43 [2022-01-31 00:55:25,665 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:55:25,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 141 [2022-01-31 00:55:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 155 [2022-01-31 00:55:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 73 [2022-01-31 00:55:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:25,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:25,874 INFO L353 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-01-31 00:55:25,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 79 treesize of output 72 [2022-01-31 00:55:25,974 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:55:25,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 89 [2022-01-31 00:55:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:25,998 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2022-01-31 00:55:25,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 98 [2022-01-31 00:55:26,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2022-01-31 00:55:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 33 [2022-01-31 00:55:26,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40 [2022-01-31 00:55:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 29 [2022-01-31 00:55:26,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:26,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:55:26,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:55:26,718 INFO L353 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2022-01-31 00:55:26,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 53 [2022-01-31 00:55:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:55:26,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:55:41,900 WARN L228 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:56:04,363 WARN L228 SmtUtils]: Spent 14.99s on a formula simplification. DAG size of input: 67 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:56:19,922 WARN L228 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:58:24,271 WARN L228 SmtUtils]: Spent 1.83m on a formula simplification. DAG size of input: 124 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:58:36,603 WARN L228 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:59:01,331 WARN L228 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)