/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 21:29:10,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 21:29:10,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 21:29:10,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 21:29:10,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 21:29:10,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 21:29:10,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 21:29:10,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 21:29:10,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 21:29:10,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 21:29:10,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 21:29:10,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 21:29:10,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 21:29:10,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 21:29:10,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 21:29:10,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 21:29:10,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 21:29:10,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 21:29:10,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 21:29:10,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 21:29:10,832 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 21:29:10,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 21:29:10,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 21:29:10,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 21:29:10,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 21:29:10,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 21:29:10,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 21:29:10,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 21:29:10,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 21:29:10,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 21:29:10,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 21:29:10,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 21:29:10,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 21:29:10,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 21:29:10,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 21:29:10,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 21:29:10,877 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 21:29:10,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 21:29:10,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 21:29:10,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 21:29:10,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 21:29:10,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 21:29:10,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 21:29:10,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 21:29:10,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 21:29:10,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 21:29:10,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 21:29:10,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 21:29:10,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 21:29:10,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:29:10,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 21:29:10,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 21:29:10,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 21:29:10,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 21:29:10,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 21:29:10,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 21:29:10,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 21:29:10,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 21:29:10,881 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 21:29:10,881 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 21:29:11,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 21:29:11,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 21:29:11,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 21:29:11,092 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 21:29:11,093 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 21:29:11,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-03-17 21:29:11,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7edabfb21/8dddc5df3d964f67af34dead74f6b79f/FLAG8ddb46c0a [2022-03-17 21:29:11,492 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 21:29:11,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-03-17 21:29:11,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7edabfb21/8dddc5df3d964f67af34dead74f6b79f/FLAG8ddb46c0a [2022-03-17 21:29:11,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7edabfb21/8dddc5df3d964f67af34dead74f6b79f [2022-03-17 21:29:11,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 21:29:11,517 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 21:29:11,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 21:29:11,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 21:29:11,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 21:29:11,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16003bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11, skipping insertion in model container [2022-03-17 21:29:11,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 21:29:11,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 21:29:11,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-03-17 21:29:11,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:29:11,713 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 21:29:11,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-03-17 21:29:11,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:29:11,742 INFO L208 MainTranslator]: Completed translation [2022-03-17 21:29:11,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11 WrapperNode [2022-03-17 21:29:11,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 21:29:11,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 21:29:11,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 21:29:11,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 21:29:11,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 21:29:11,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 21:29:11,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 21:29:11,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 21:29:11,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:11,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:29:11,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:11,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 21:29:11,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 21:29:11,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 21:29:11,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 21:29:11,823 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 21:29:11,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 21:29:11,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 21:29:11,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 21:29:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 21:29:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 21:29:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 21:29:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 21:29:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 21:29:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 21:29:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 21:29:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 21:29:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 21:29:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 21:29:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 21:29:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 21:29:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 21:29:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 21:29:11,873 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 21:29:11,874 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 21:29:11,984 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 21:29:11,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 21:29:11,988 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 21:29:11,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:29:11 BoogieIcfgContainer [2022-03-17 21:29:11,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 21:29:11,990 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 21:29:11,990 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 21:29:11,991 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 21:29:11,993 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:29:11" (1/1) ... [2022-03-17 21:29:12,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:29:12 BasicIcfg [2022-03-17 21:29:12,007 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 21:29:12,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 21:29:12,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 21:29:12,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 21:29:12,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:29:11" (1/4) ... [2022-03-17 21:29:12,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4206f15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:29:12, skipping insertion in model container [2022-03-17 21:29:12,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:29:11" (2/4) ... [2022-03-17 21:29:12,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4206f15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:29:12, skipping insertion in model container [2022-03-17 21:29:12,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:29:11" (3/4) ... [2022-03-17 21:29:12,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4206f15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:29:12, skipping insertion in model container [2022-03-17 21:29:12,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:29:12" (4/4) ... [2022-03-17 21:29:12,012 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.cqvasr [2022-03-17 21:29:12,015 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 21:29:12,016 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 21:29:12,045 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 21:29:12,050 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-17 21:29:12,050 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 21:29:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 21:29:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 21:29:12,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:12,073 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:12,074 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-03-17 21:29:12,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:12,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075610254] [2022-03-17 21:29:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:12,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:29:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:29:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 21:29:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 21:29:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-17 21:29:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-17 21:29:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 21:29:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 21:29:12,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:12,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075610254] [2022-03-17 21:29:12,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075610254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:29:12,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:29:12,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:29:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682343572] [2022-03-17 21:29:12,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:29:12,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:29:12,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:29:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:29:12,350 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:29:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:12,448 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-17 21:29:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:29:12,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-17 21:29:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:12,456 INFO L225 Difference]: With dead ends: 73 [2022-03-17 21:29:12,457 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 21:29:12,460 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:29:12,466 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:12,468 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:29:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 21:29:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 21:29:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 21:29:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-17 21:29:12,524 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-17 21:29:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:12,525 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-17 21:29:12,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:29:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-17 21:29:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 21:29:12,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:12,529 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:12,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 21:29:12,531 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-03-17 21:29:12,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:12,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502200944] [2022-03-17 21:29:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:12,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:12,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:12,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144089011] [2022-03-17 21:29:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:12,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:12,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:12,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:12,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 21:29:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:29:12,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 21:29:12,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 21:29:12,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:12,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502200944] [2022-03-17 21:29:12,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:12,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144089011] [2022-03-17 21:29:12,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144089011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:29:12,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:29:12,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-17 21:29:12,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933473913] [2022-03-17 21:29:12,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:12,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 21:29:12,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:12,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 21:29:12,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 21:29:12,848 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:29:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:12,919 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-17 21:29:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:29:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-17 21:29:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:12,920 INFO L225 Difference]: With dead ends: 52 [2022-03-17 21:29:12,921 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 21:29:12,921 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:29:12,922 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:12,922 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 184 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:29:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 21:29:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-17 21:29:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 21:29:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-17 21:29:12,930 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-17 21:29:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:12,930 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-17 21:29:12,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:29:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-17 21:29:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 21:29:12,931 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:12,932 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:12,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:13,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:13,137 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-03-17 21:29:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302438625] [2022-03-17 21:29:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:13,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:13,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947566936] [2022-03-17 21:29:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:13,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:13,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:13,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:13,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 21:29:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:13,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 21:29:13,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 21:29:13,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 21:29:13,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:13,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302438625] [2022-03-17 21:29:13,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:13,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947566936] [2022-03-17 21:29:13,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947566936] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:29:13,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:29:13,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 21:29:13,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188068255] [2022-03-17 21:29:13,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:29:13,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:29:13,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:13,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:29:13,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:29:13,495 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-17 21:29:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:13,527 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-03-17 21:29:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:29:13,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-17 21:29:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:13,528 INFO L225 Difference]: With dead ends: 43 [2022-03-17 21:29:13,528 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 21:29:13,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:29:13,529 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:13,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:29:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 21:29:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-17 21:29:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 21:29:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-17 21:29:13,544 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-03-17 21:29:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:13,546 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-17 21:29:13,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-17 21:29:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-17 21:29:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 21:29:13,548 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:13,548 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:13,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:13,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 21:29:13,766 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-03-17 21:29:13,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:13,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655301153] [2022-03-17 21:29:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:13,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:13,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:13,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597247790] [2022-03-17 21:29:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:13,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:13,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:13,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:13,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 21:29:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:13,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 21:29:13,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 21:29:14,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:14,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655301153] [2022-03-17 21:29:14,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597247790] [2022-03-17 21:29:14,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597247790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:29:14,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:29:14,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-17 21:29:14,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708186160] [2022-03-17 21:29:14,147 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:14,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:29:14,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:14,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:29:14,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:29:14,149 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 21:29:14,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:14,278 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-03-17 21:29:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 21:29:14,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-17 21:29:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:14,280 INFO L225 Difference]: With dead ends: 54 [2022-03-17 21:29:14,280 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 21:29:14,280 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:29:14,281 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:14,281 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:29:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 21:29:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-17 21:29:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 21:29:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-03-17 21:29:14,290 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-03-17 21:29:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:14,290 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-03-17 21:29:14,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 21:29:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-03-17 21:29:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 21:29:14,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:14,291 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:14,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:14,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:14,507 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-03-17 21:29:14,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:14,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253250049] [2022-03-17 21:29:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:14,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:14,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:14,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47132868] [2022-03-17 21:29:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:14,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:14,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:14,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 21:29:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:14,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 21:29:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 21:29:14,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 21:29:14,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:14,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253250049] [2022-03-17 21:29:14,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:14,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47132868] [2022-03-17 21:29:14,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47132868] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:29:14,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:29:14,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 21:29:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316138865] [2022-03-17 21:29:14,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:29:14,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:29:14,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:14,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:29:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:29:14,937 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 21:29:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:14,979 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-03-17 21:29:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:29:14,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-17 21:29:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:14,980 INFO L225 Difference]: With dead ends: 58 [2022-03-17 21:29:14,980 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 21:29:14,981 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:29:14,981 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:14,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:29:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 21:29:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-17 21:29:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 21:29:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-17 21:29:14,989 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-03-17 21:29:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:14,989 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-17 21:29:14,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 21:29:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-17 21:29:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-17 21:29:14,990 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:14,990 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:15,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:15,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:15,191 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-03-17 21:29:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:15,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001753838] [2022-03-17 21:29:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:15,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:15,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822803771] [2022-03-17 21:29:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:15,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:15,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:15,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:15,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 21:29:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:15,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 21:29:15,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-17 21:29:15,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:15,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:15,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001753838] [2022-03-17 21:29:15,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822803771] [2022-03-17 21:29:15,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822803771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:29:15,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:29:15,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-17 21:29:15,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578745704] [2022-03-17 21:29:15,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:15,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 21:29:15,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:15,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 21:29:15,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:29:15,506 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 21:29:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:15,581 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-17 21:29:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 21:29:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-17 21:29:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:15,582 INFO L225 Difference]: With dead ends: 62 [2022-03-17 21:29:15,582 INFO L226 Difference]: Without dead ends: 60 [2022-03-17 21:29:15,582 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:29:15,583 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:15,583 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:29:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-17 21:29:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-17 21:29:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 21:29:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-17 21:29:15,590 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-03-17 21:29:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:15,590 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-17 21:29:15,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 21:29:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-17 21:29:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-17 21:29:15,591 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:15,592 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:15,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:15,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:15,801 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-03-17 21:29:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:15,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698365171] [2022-03-17 21:29:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:15,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:15,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129762199] [2022-03-17 21:29:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:15,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:15,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:15,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:15,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 21:29:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:29:15,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-17 21:29:15,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-17 21:29:16,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698365171] [2022-03-17 21:29:16,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129762199] [2022-03-17 21:29:16,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129762199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:29:16,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:29:16,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 21:29:16,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473404062] [2022-03-17 21:29:16,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:16,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 21:29:16,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:16,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 21:29:16,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:29:16,077 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-17 21:29:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:16,189 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-17 21:29:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 21:29:16,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-17 21:29:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:16,190 INFO L225 Difference]: With dead ends: 106 [2022-03-17 21:29:16,191 INFO L226 Difference]: Without dead ends: 98 [2022-03-17 21:29:16,191 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:29:16,191 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:16,191 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:29:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-17 21:29:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-17 21:29:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 21:29:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-17 21:29:16,219 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-17 21:29:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:16,219 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-17 21:29:16,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-17 21:29:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-17 21:29:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 21:29:16,220 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:16,220 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:16,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:16,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:16,433 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-03-17 21:29:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:16,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67105044] [2022-03-17 21:29:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:16,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:16,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110762977] [2022-03-17 21:29:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:16,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:16,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:16,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:16,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 21:29:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:16,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 21:29:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-17 21:29:16,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-17 21:29:16,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67105044] [2022-03-17 21:29:16,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110762977] [2022-03-17 21:29:16,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110762977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:29:16,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:29:16,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-17 21:29:16,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884450768] [2022-03-17 21:29:16,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:16,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 21:29:16,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:16,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 21:29:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:29:16,852 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-17 21:29:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:17,064 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2022-03-17 21:29:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 21:29:17,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-03-17 21:29:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:17,067 INFO L225 Difference]: With dead ends: 132 [2022-03-17 21:29:17,067 INFO L226 Difference]: Without dead ends: 128 [2022-03-17 21:29:17,068 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-17 21:29:17,068 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:17,069 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 397 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:29:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-17 21:29:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-03-17 21:29:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-17 21:29:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-03-17 21:29:17,109 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-03-17 21:29:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:17,109 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-03-17 21:29:17,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-17 21:29:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-03-17 21:29:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-17 21:29:17,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:17,113 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:17,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:17,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:17,330 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-03-17 21:29:17,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:17,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484357292] [2022-03-17 21:29:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:17,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:17,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:17,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217825017] [2022-03-17 21:29:17,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:29:17,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:17,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:17,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 21:29:17,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:29:17,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:29:17,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 21:29:17,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-17 21:29:17,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-17 21:29:17,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484357292] [2022-03-17 21:29:17,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217825017] [2022-03-17 21:29:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217825017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:29:17,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:29:17,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-17 21:29:17,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437156122] [2022-03-17 21:29:17,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:17,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 21:29:17,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 21:29:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-17 21:29:17,996 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-17 21:29:19,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:19,250 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-03-17 21:29:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 21:29:19,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-03-17 21:29:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:19,252 INFO L225 Difference]: With dead ends: 128 [2022-03-17 21:29:19,252 INFO L226 Difference]: Without dead ends: 126 [2022-03-17 21:29:19,252 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-17 21:29:19,253 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:19,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 305 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-17 21:29:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-17 21:29:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-03-17 21:29:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-17 21:29:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-17 21:29:19,272 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-03-17 21:29:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:19,272 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-17 21:29:19,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-17 21:29:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-17 21:29:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-17 21:29:19,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:19,273 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:19,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:19,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 21:29:19,499 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-03-17 21:29:19,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:19,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525912286] [2022-03-17 21:29:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:19,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:19,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023574367] [2022-03-17 21:29:19,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:29:19,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:19,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:19,536 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:19,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 21:29:19,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 21:29:19,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:29:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-17 21:29:19,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 21:29:19,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:19,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525912286] [2022-03-17 21:29:19,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023574367] [2022-03-17 21:29:19,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023574367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:29:19,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:29:19,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-17 21:29:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732480185] [2022-03-17 21:29:19,966 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:19,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 21:29:19,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 21:29:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:29:19,967 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-17 21:29:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:20,221 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2022-03-17 21:29:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 21:29:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-17 21:29:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:20,223 INFO L225 Difference]: With dead ends: 144 [2022-03-17 21:29:20,223 INFO L226 Difference]: Without dead ends: 142 [2022-03-17 21:29:20,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:29:20,224 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:20,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:29:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-17 21:29:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-17 21:29:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-17 21:29:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-03-17 21:29:20,245 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-03-17 21:29:20,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:20,245 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-03-17 21:29:20,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-17 21:29:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-03-17 21:29:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 21:29:20,246 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:20,246 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:29:20,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:20,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 21:29:20,464 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:20,464 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-03-17 21:29:20,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:20,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896156339] [2022-03-17 21:29:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:20,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:20,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:20,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205477614] [2022-03-17 21:29:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:20,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:20,486 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:29:20,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 21:29:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 21:29:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-17 21:29:20,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-17 21:29:21,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896156339] [2022-03-17 21:29:21,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205477614] [2022-03-17 21:29:21,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205477614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:29:21,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:29:21,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-17 21:29:21,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982412673] [2022-03-17 21:29:21,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:21,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 21:29:21,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:21,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 21:29:21,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:29:21,220 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 21:29:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:29:23,294 INFO L93 Difference]: Finished difference Result 228 states and 311 transitions. [2022-03-17 21:29:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 21:29:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-03-17 21:29:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:29:23,296 INFO L225 Difference]: With dead ends: 228 [2022-03-17 21:29:23,296 INFO L226 Difference]: Without dead ends: 220 [2022-03-17 21:29:23,296 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-17 21:29:23,297 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 53 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-17 21:29:23,297 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 440 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-17 21:29:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-17 21:29:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-17 21:29:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-17 21:29:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-03-17 21:29:23,331 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-03-17 21:29:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:29:23,331 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-03-17 21:29:23,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 21:29:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-03-17 21:29:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-17 21:29:23,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:29:23,332 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 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, 1] [2022-03-17 21:29:23,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 21:29:23,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 21:29:23,549 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:29:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:29:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-03-17 21:29:23,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:29:23,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599884873] [2022-03-17 21:29:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:29:23,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:29:23,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548357648] [2022-03-17 21:29:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:29:23,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:29:23,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:29:23,575 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) [2022-03-17 21:29:23,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 21:29:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:29:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-17 21:29:23,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:29:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-17 21:29:24,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:29:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 79 proven. 27 refuted. 6 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-17 21:29:38,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:29:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599884873] [2022-03-17 21:29:38,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:29:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548357648] [2022-03-17 21:29:38,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548357648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:29:38,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:29:38,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2022-03-17 21:29:38,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632753946] [2022-03-17 21:29:38,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:29:38,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 21:29:38,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:29:38,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 21:29:38,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=260, Unknown=4, NotChecked=0, Total=342 [2022-03-17 21:29:38,946 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) [2022-03-17 21:30:48,976 WARN L232 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:30:50,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:30:55,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:30:57,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:30:59,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:01,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:03,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:07,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:09,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:11,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:21,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:24,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:26,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:37,182 WARN L232 SmtUtils]: Spent 9.97s on a formula simplification. DAG size of input: 63 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:31:39,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:02,135 WARN L232 SmtUtils]: Spent 20.25s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:32:04,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:24,867 WARN L232 SmtUtils]: Spent 16.99s on a formula simplification. DAG size of input: 86 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:32:27,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:40,467 WARN L232 SmtUtils]: Spent 12.11s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:32:42,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:44,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:55,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:57,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:24,188 WARN L232 SmtUtils]: Spent 25.37s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:33:56,643 WARN L232 SmtUtils]: Spent 30.05s on a formula simplification. DAG size of input: 85 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:33:58,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:00,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:02,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:04,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:27,567 WARN L232 SmtUtils]: Spent 20.56s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:34:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:27,674 INFO L93 Difference]: Finished difference Result 278 states and 384 transitions. [2022-03-17 21:34:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 21:34:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) Word has length 107 [2022-03-17 21:34:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:27,676 INFO L225 Difference]: With dead ends: 278 [2022-03-17 21:34:27,676 INFO L226 Difference]: Without dead ends: 276 [2022-03-17 21:34:27,677 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 247.7s TimeCoverageRelationStatistics Valid=318, Invalid=926, Unknown=16, NotChecked=0, Total=1260 [2022-03-17 21:34:27,677 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 70 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 134 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:27,677 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 464 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 636 Invalid, 22 Unknown, 0 Unchecked, 53.1s Time] [2022-03-17 21:34:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-17 21:34:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 260. [2022-03-17 21:34:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 142 states have internal predecessors, (164), 101 states have call successors, (101), 20 states have call predecessors, (101), 19 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-17 21:34:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 364 transitions. [2022-03-17 21:34:27,733 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 364 transitions. Word has length 107 [2022-03-17 21:34:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:27,733 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 364 transitions. [2022-03-17 21:34:27,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) [2022-03-17 21:34:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 364 transitions. [2022-03-17 21:34:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-17 21:34:27,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:27,734 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2022-03-17 21:34:27,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:27,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 21:34:27,948 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash -426906627, now seen corresponding path program 4 times [2022-03-17 21:34:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:27,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234542818] [2022-03-17 21:34:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:27,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:27,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:27,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971090026] [2022-03-17 21:34:27,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 21:34:27,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:27,979 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) [2022-03-17 21:34:27,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 21:34:28,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 21:34:28,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:34:28,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:34:28,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-17 21:34:28,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:34:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:28,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234542818] [2022-03-17 21:34:28,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:28,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971090026] [2022-03-17 21:34:28,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971090026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:34:28,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:34:28,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:34:28,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122318287] [2022-03-17 21:34:28,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:34:28,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:34:28,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:28,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:34:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:34:28,171 INFO L87 Difference]: Start difference. First operand 260 states and 364 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-17 21:34:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:28,242 INFO L93 Difference]: Finished difference Result 325 states and 445 transitions. [2022-03-17 21:34:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:34:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-03-17 21:34:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:28,243 INFO L225 Difference]: With dead ends: 325 [2022-03-17 21:34:28,243 INFO L226 Difference]: Without dead ends: 199 [2022-03-17 21:34:28,244 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 21:34:28,245 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:28,245 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:34:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-17 21:34:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 123. [2022-03-17 21:34:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-17 21:34:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-03-17 21:34:28,271 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 110 [2022-03-17 21:34:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:28,274 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-03-17 21:34:28,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-17 21:34:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-03-17 21:34:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-17 21:34:28,276 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:28,276 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:34:28,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:28,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 21:34:28,487 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-03-17 21:34:28,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:28,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40382043] [2022-03-17 21:34:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:28,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:28,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020544360] [2022-03-17 21:34:28,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:34:28,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:28,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:28,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:34:28,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 21:34:28,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:34:28,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:34:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-17 21:34:28,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-17 21:34:30,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:34:31,077 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:34:31,079 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:34:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-17 21:34:47,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:47,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40382043] [2022-03-17 21:34:47,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:47,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020544360] [2022-03-17 21:34:47,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020544360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:34:47,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:34:47,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-17 21:34:47,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349078746] [2022-03-17 21:34:47,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:34:47,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-17 21:34:47,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-17 21:34:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=673, Unknown=4, NotChecked=0, Total=812 [2022-03-17 21:34:47,215 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-17 21:34:59,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:02,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:04,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:06,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:08,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:14,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:17,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:36,577 WARN L232 SmtUtils]: Spent 18.52s on a formula simplification. DAG size of input: 117 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:35:52,563 WARN L232 SmtUtils]: Spent 14.42s on a formula simplification. DAG size of input: 103 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:35:54,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:56,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:00,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:19,152 WARN L232 SmtUtils]: Spent 12.77s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:36:50,899 WARN L232 SmtUtils]: Spent 30.57s on a formula simplification. DAG size of input: 121 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:37:15,652 WARN L232 SmtUtils]: Spent 17.13s on a formula simplification. DAG size of input: 100 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:37:27,545 WARN L232 SmtUtils]: Spent 8.84s on a formula simplification. DAG size of input: 96 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:37:30,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:45,580 WARN L232 SmtUtils]: Spent 8.53s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:37:57,006 WARN L232 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 101 DAG size of output: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:38:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:38:03,740 INFO L93 Difference]: Finished difference Result 246 states and 335 transitions. [2022-03-17 21:38:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-17 21:38:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) Word has length 138 [2022-03-17 21:38:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:38:03,742 INFO L225 Difference]: With dead ends: 246 [2022-03-17 21:38:03,742 INFO L226 Difference]: Without dead ends: 240 [2022-03-17 21:38:03,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 170.1s TimeCoverageRelationStatistics Valid=886, Invalid=3527, Unknown=9, NotChecked=0, Total=4422 [2022-03-17 21:38:03,743 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 160 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 423 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.8s IncrementalHoareTripleChecker+Time [2022-03-17 21:38:03,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 629 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1137 Invalid, 10 Unknown, 0 Unchecked, 39.8s Time] [2022-03-17 21:38:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-17 21:38:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 174. [2022-03-17 21:38:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 96 states have internal predecessors, (106), 61 states have call successors, (61), 18 states have call predecessors, (61), 16 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-17 21:38:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 226 transitions. [2022-03-17 21:38:03,802 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 226 transitions. Word has length 138 [2022-03-17 21:38:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:38:03,804 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 226 transitions. [2022-03-17 21:38:03,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-17 21:38:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 226 transitions. [2022-03-17 21:38:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-17 21:38:03,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:38:03,805 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2022-03-17 21:38:03,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 21:38:04,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 21:38:04,022 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:38:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:38:04,022 INFO L85 PathProgramCache]: Analyzing trace with hash 980979816, now seen corresponding path program 3 times [2022-03-17 21:38:04,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:38:04,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981112984] [2022-03-17 21:38:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:38:04,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:38:04,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:38:04,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929248845] [2022-03-17 21:38:04,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:38:04,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:38:04,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:38:04,032 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:38:04,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 21:38:04,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 21:38:04,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:38:04,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-17 21:38:04,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:38:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 175 proven. 99 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-03-17 21:38:05,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:38:07,833 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:38:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 169 proven. 90 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2022-03-17 21:38:51,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:38:51,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981112984] [2022-03-17 21:38:51,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:38:51,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929248845] [2022-03-17 21:38:51,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929248845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:38:51,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:38:51,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2022-03-17 21:38:51,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362757653] [2022-03-17 21:38:51,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:38:51,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 21:38:51,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:38:51,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 21:38:51,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=769, Unknown=4, NotChecked=0, Total=930 [2022-03-17 21:38:51,093 INFO L87 Difference]: Start difference. First operand 174 states and 226 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 17 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (45), 13 states have call predecessors, (45), 15 states have call successors, (45) [2022-03-17 21:38:54,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:38:56,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:22,942 WARN L232 SmtUtils]: Spent 25.36s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:39:24,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:36,585 WARN L232 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:39:38,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:40,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:42,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:45,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:47,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:49,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:08,876 WARN L232 SmtUtils]: Spent 16.55s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:40:10,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:13,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:15,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:50,830 WARN L232 SmtUtils]: Spent 30.20s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:40:53,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:55,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:57,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:59,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:01,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:03,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:11,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:13,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:15,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:17,361 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse13 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse10 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse3 (* c_main_~q~0 c_main_~x~0)) (.cse4 (* c_main_~s~0 c_main_~y~0)) (.cse16 (* c_main_~p~0 c_main_~x~0)) (.cse17 (* c_main_~r~0 c_main_~y~0)) (.cse11 (* .cse10 c_main_~y~0)) (.cse12 (* .cse13 c_main_~x~0))) (let ((.cse6 (+ .cse11 .cse12)) (.cse7 (<= c_main_~b~0 c_main_~c~0)) (.cse5 (+ .cse16 .cse17)) (.cse1 (+ .cse3 .cse4))) (and (let ((.cse0 (+ (* (- 1) c_main_~b~0) c_main_~a~0))) (or (not (= (mod .cse0 c_main_~b~0) 0)) (not (= c_main_~b~0 .cse1)) (= (let ((.cse2 (div .cse0 c_main_~b~0))) (+ (* .cse2 c_main_~q~0 c_main_~x~0) .cse3 .cse4 (* .cse2 c_main_~s~0 c_main_~y~0))) .cse5) (<= c_main_~b~0 0))) (or (not (= c_main_~c~0 0)) (= .cse6 0) .cse7) (<= 0 c_main_~x~0) (let ((.cse8 (+ c_main_~b~0 (* (- 1) c_main_~c~0)))) (or (not (= c_main_~c~0 .cse6)) (<= c_main_~c~0 0) (not (= (mod .cse8 c_main_~c~0) 0)) (= (let ((.cse9 (div .cse8 c_main_~c~0))) (+ (* .cse9 .cse10 c_main_~y~0) .cse11 .cse12 (* .cse9 .cse13 c_main_~x~0))) .cse1) .cse7)) (let ((.cse18 (* c_main_~q~0 c_main_~x~0 0)) (.cse19 (* c_main_~s~0 c_main_~y~0 0))) (or (<= (+ c_main_~b~0 .cse3 .cse4) .cse5) (<= .cse5 .cse1) (not (= (let ((.cse14 (* (+ (* (- 1) c_main_~s~0) c_main_~r~0) c_main_~y~0)) (.cse15 (* (+ (* (- 1) c_main_~q~0) c_main_~p~0) c_main_~x~0))) (mod (+ c_main_~b~0 (* (- 1) .cse14) (* (- 1) .cse15)) (+ .cse14 .cse15))) 0)) (not (= (+ c_main_~b~0 .cse16 .cse17) (+ .cse18 .cse3 .cse19 .cse4 c_main_~a~0))) (let ((.cse20 (div (+ .cse18 c_main_~b~0 .cse3 .cse19 (* (- 1) c_main_~r~0 c_main_~y~0) .cse4 (* (- 1) c_main_~p~0 c_main_~x~0)) (+ (* (- 1) c_main_~q~0 c_main_~x~0 0) (* (- 1) c_main_~s~0 c_main_~y~0) (* (- 1) c_main_~s~0 c_main_~y~0 0) .cse16 .cse17 (* (- 1) c_main_~q~0 c_main_~x~0))))) (= (+ (* .cse3 2) .cse18 (* 2 .cse4) (* .cse20 c_main_~s~0 c_main_~y~0 0) (* .cse20 c_main_~q~0 c_main_~x~0) .cse19 (* .cse20 c_main_~s~0 c_main_~y~0) (* .cse20 c_main_~q~0 c_main_~x~0 0)) (+ (* .cse20 c_main_~p~0 c_main_~x~0) .cse16 .cse17 (* .cse20 c_main_~r~0 c_main_~y~0)))))) (<= c_main_~x~0 20) (or (= .cse1 0) (not (= c_main_~b~0 0))))))) is different from true [2022-03-17 21:41:29,013 WARN L232 SmtUtils]: Spent 8.32s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:41:31,112 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_main_~q~0 c_main_~x~0)) (.cse4 (* c_main_~s~0 c_main_~y~0))) (let ((.cse0 (not (= c_main_~b~0 (+ .cse3 .cse4))))) (and (or (not (= c_main_~c~0 0)) (not (= (+ (* c_main_~b~0 c_main_~k~0) c_main_~c~0) c_main_~a~0)) (= (+ (* (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))) c_main_~y~0) (* (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0)) c_main_~x~0)) 0) (<= c_main_~b~0 c_main_~c~0) .cse0) (let ((.cse1 (+ (* (- 1) c_main_~b~0) c_main_~a~0))) (or (not (= (mod .cse1 c_main_~b~0) 0)) .cse0 (= (let ((.cse2 (div .cse1 c_main_~b~0))) (+ (* .cse2 c_main_~q~0 c_main_~x~0) .cse3 .cse4 (* .cse2 c_main_~s~0 c_main_~y~0))) (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0))) (<= c_main_~b~0 0)))))) is different from true [2022-03-17 21:41:33,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:51,278 WARN L232 SmtUtils]: Spent 14.93s on a formula simplification that was a NOOP. DAG size: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:42:03,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:42:05,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:42:08,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:42:13,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:42:15,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:42:24,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:42:26,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:42:51,302 WARN L232 SmtUtils]: Spent 19.09s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:42:53,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:42:58,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:43:00,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:43:02,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:43:04,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:43:06,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:43:31,605 WARN L232 SmtUtils]: Spent 18.38s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:43:34,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:43:53,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []