/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/dijkstra-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:44:13,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:44:13,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:44:13,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:44:13,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:44:13,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:44:13,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:44:13,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:44:13,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:44:13,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:44:13,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:44:13,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:44:13,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:44:13,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:44:13,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:44:13,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:44:13,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:44:13,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:44:13,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:44:13,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:44:13,770 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:44:13,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:44:13,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:44:13,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:44:13,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:44:13,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 20:44:13,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:44:13,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:44:13,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:44:13,780 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 20:44:13,794 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:44:13,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:44:13,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:44:13,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:44:13,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:44:13,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:44:13,795 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:44:13,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:44:13,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:44:13,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:44:13,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:44:13,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:44:13,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:44:13,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:44:13,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:44:13,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:44:13,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:44:13,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:44:13,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:44:13,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:44:13,798 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:44:13,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:44:13,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:44:13,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:44:13,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:44:13,982 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:44:13,988 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:44:13,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2022-03-17 20:44:14,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/746d74c18/a49399a1719b4346bf08eedc4c89ae3f/FLAGa022b02ab [2022-03-17 20:44:14,408 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:44:14,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2022-03-17 20:44:14,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/746d74c18/a49399a1719b4346bf08eedc4c89ae3f/FLAGa022b02ab [2022-03-17 20:44:14,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/746d74c18/a49399a1719b4346bf08eedc4c89ae3f [2022-03-17 20:44:14,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:44:14,423 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:44:14,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:44:14,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:44:14,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:44:14,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c730b7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14, skipping insertion in model container [2022-03-17 20:44:14,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:44:14,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:44:14,531 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/dijkstra-u_unwindbound5.c[525,538] [2022-03-17 20:44:14,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:44:14,572 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:44:14,579 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound5.c[525,538] [2022-03-17 20:44:14,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:44:14,596 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:44:14,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14 WrapperNode [2022-03-17 20:44:14,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:44:14,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:44:14,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:44:14,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:44:14,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:44:14,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:44:14,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:44:14,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:44:14,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:44:14,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:44:14,643 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 20:44:14,645 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 20:44:14,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:44:14,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:44:14,665 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:44:14,665 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:44:14,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:44:14,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:44:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:44:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:44:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:44:14,714 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:44:14,715 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:44:14,865 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:44:14,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:44:14,869 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 20:44:14,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:44:14 BoogieIcfgContainer [2022-03-17 20:44:14,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:44:14,871 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:44:14,871 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:44:14,872 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:44:14,874 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:44:14" (1/1) ... [2022-03-17 20:44:14,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:44:14 BasicIcfg [2022-03-17 20:44:14,895 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:44:14,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:44:14,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:44:14,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:44:14,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:44:14" (1/4) ... [2022-03-17 20:44:14,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ad2287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:44:14, skipping insertion in model container [2022-03-17 20:44:14,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:44:14" (2/4) ... [2022-03-17 20:44:14,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ad2287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:44:14, skipping insertion in model container [2022-03-17 20:44:14,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:44:14" (3/4) ... [2022-03-17 20:44:14,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ad2287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:44:14, skipping insertion in model container [2022-03-17 20:44:14,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:44:14" (4/4) ... [2022-03-17 20:44:14,909 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound5.cqvasr [2022-03-17 20:44:14,914 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:44:14,914 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:44:14,945 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:44:14,949 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 20:44:14,949 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:44:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 20:44:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 20:44:14,969 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:44:14,969 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:44:14,969 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:44:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:44:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-03-17 20:44:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:44:14,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400463850] [2022-03-17 20:44:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:14,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:44:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:15,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:44:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:15,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:44:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:15,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:44:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400463850] [2022-03-17 20:44:15,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400463850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:44:15,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:44:15,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:44:15,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149140234] [2022-03-17 20:44:15,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:44:15,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:44:15,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:44:15,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:44:15,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:44:15,154 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:44:17,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:44:17,335 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2022-03-17 20:44:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:44:17,336 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 20:44:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:44:17,341 INFO L225 Difference]: With dead ends: 70 [2022-03-17 20:44:17,341 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 20:44:17,343 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:44:17,345 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:44:17,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 20:44:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 20:44:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-17 20:44:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 20:44:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-03-17 20:44:17,378 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-03-17 20:44:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:44:17,378 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-03-17 20:44:17,378 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:44:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-03-17 20:44:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 20:44:17,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:44:17,380 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:44:17,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:44:17,381 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:44:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:44:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-03-17 20:44:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:44:17,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386617505] [2022-03-17 20:44:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:44:17,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:44:17,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198575534] [2022-03-17 20:44:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:17,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:44:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:44:17,402 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 20:44:17,403 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 20:44:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:17,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 20:44:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:44:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:17,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:44:17,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:44:17,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386617505] [2022-03-17 20:44:17,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:44:17,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198575534] [2022-03-17 20:44:17,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198575534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:44:17,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:44:17,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:44:17,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908558099] [2022-03-17 20:44:17,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:44:17,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 20:44:17,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:44:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 20:44:17,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:44:17,513 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:44:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:44:17,525 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-03-17 20:44:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 20:44:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-17 20:44:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:44:17,526 INFO L225 Difference]: With dead ends: 55 [2022-03-17 20:44:17,526 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 20:44:17,527 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:44:17,527 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:44:17,528 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:44:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 20:44:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-17 20:44:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 20:44:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-03-17 20:44:17,534 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-03-17 20:44:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:44:17,534 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-03-17 20:44:17,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:44:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-03-17 20:44:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 20:44:17,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:44:17,535 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:44:17,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 20:44:17,758 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 20:44:17,759 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:44:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:44:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-03-17 20:44:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:44:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408814714] [2022-03-17 20:44:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:44:17,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:44:17,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295553542] [2022-03-17 20:44:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:17,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:44:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:44:17,783 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 20:44:17,787 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 20:44:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:44:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:44:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:17,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:44:17,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:44:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408814714] [2022-03-17 20:44:17,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:44:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295553542] [2022-03-17 20:44:17,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295553542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:44:17,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:44:17,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:44:17,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756581010] [2022-03-17 20:44:17,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:44:17,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:44:17,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:44:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:44:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:44:17,925 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:44:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:44:17,954 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-17 20:44:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:44:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-17 20:44:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:44:17,958 INFO L225 Difference]: With dead ends: 49 [2022-03-17 20:44:17,958 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 20:44:17,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:44:17,959 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:44:17,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:44:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 20:44:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-17 20:44:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 20:44:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-03-17 20:44:17,965 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-03-17 20:44:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:44:17,965 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-03-17 20:44:17,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:44:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-03-17 20:44:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 20:44:17,966 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:44:17,966 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:44:17,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 20:44:18,179 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 20:44:18,179 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:44:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:44:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-03-17 20:44:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:44:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21815502] [2022-03-17 20:44:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:44:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:18,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:44:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:18,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:44:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:18,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:44:18,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21815502] [2022-03-17 20:44:18,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21815502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:44:18,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:44:18,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-17 20:44:18,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121968203] [2022-03-17 20:44:18,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:44:18,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 20:44:18,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:44:18,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 20:44:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-17 20:44:18,360 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:44:21,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:44:21,301 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-03-17 20:44:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 20:44:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-03-17 20:44:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:44:21,303 INFO L225 Difference]: With dead ends: 72 [2022-03-17 20:44:21,303 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 20:44:21,303 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-17 20:44:21,315 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-17 20:44:21,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 133 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 166 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-03-17 20:44:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 20:44:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-17 20:44:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 20:44:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-03-17 20:44:21,325 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-03-17 20:44:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:44:21,325 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-03-17 20:44:21,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:44:21,325 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-03-17 20:44:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 20:44:21,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:44:21,326 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:44:21,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 20:44:21,326 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:44:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:44:21,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-03-17 20:44:21,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:44:21,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927631239] [2022-03-17 20:44:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:21,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:44:21,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:44:21,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28457938] [2022-03-17 20:44:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:44:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:44:21,334 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 20:44:21,335 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 20:44:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:21,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:44:21,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:44:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:21,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:44:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:21,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:44:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927631239] [2022-03-17 20:44:21,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:44:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28457938] [2022-03-17 20:44:21,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28457938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:44:21,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:44:21,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 20:44:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611801381] [2022-03-17 20:44:21,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:44:21,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:44:21,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:44:21,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:44:21,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:44:21,466 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:44:24,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:26,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:44:29,192 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-03-17 20:44:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 20:44:29,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-03-17 20:44:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:44:29,193 INFO L225 Difference]: With dead ends: 104 [2022-03-17 20:44:29,193 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 20:44:29,194 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:44:29,194 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 59 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-03-17 20:44:29,194 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 286 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-03-17 20:44:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 20:44:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-03-17 20:44:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 20:44:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-03-17 20:44:29,222 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 23 [2022-03-17 20:44:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:44:29,222 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-03-17 20:44:29,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:44:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-03-17 20:44:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 20:44:29,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:44:29,223 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:44:29,242 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 20:44:29,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:44:29,440 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:44:29,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:44:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-03-17 20:44:29,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:44:29,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654690499] [2022-03-17 20:44:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:29,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:44:29,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:44:29,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799748027] [2022-03-17 20:44:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:44:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:44:29,450 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 20:44:29,451 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 20:44:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:44:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:44:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:29,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:44:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:29,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:44:29,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654690499] [2022-03-17 20:44:29,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:44:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799748027] [2022-03-17 20:44:29,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799748027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:44:29,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:44:29,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-17 20:44:29,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426713034] [2022-03-17 20:44:29,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:44:29,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 20:44:29,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:44:29,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 20:44:29,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:44:29,624 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:44:31,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:33,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 20:44:36,134 WARN L534 Checker$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 20:44:37,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 20:44:39,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:41,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:43,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:45,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:44:46,577 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2022-03-17 20:44:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 20:44:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-03-17 20:44:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:44:46,579 INFO L225 Difference]: With dead ends: 116 [2022-03-17 20:44:46,579 INFO L226 Difference]: Without dead ends: 107 [2022-03-17 20:44:46,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-17 20:44:46,580 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 103 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 39 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-03-17 20:44:46,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 227 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 88 Invalid, 6 Unknown, 0 Unchecked, 16.9s Time] [2022-03-17 20:44:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-17 20:44:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-03-17 20:44:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 37 states have call successors, (37), 8 states have call predecessors, (37), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 20:44:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 141 transitions. [2022-03-17 20:44:46,594 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 141 transitions. Word has length 24 [2022-03-17 20:44:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:44:46,594 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 141 transitions. [2022-03-17 20:44:46,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:44:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 141 transitions. [2022-03-17 20:44:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 20:44:46,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:44:46,595 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:44:46,611 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 20:44:46,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:44:46,796 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:44:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:44:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-03-17 20:44:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:44:46,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256586607] [2022-03-17 20:44:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:46,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:44:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:46,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:44:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:46,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:44:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:46,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:44:46,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256586607] [2022-03-17 20:44:46,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256586607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:44:46,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774945285] [2022-03-17 20:44:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:44:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:44:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:44:46,934 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 20:44:46,935 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 20:44:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:44:46,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 20:44:46,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:44:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:47,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:44:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:44:47,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774945285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:44:47,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:44:47,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-17 20:44:47,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671711964] [2022-03-17 20:44:47,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:44:47,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 20:44:47,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:44:47,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 20:44:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-17 20:44:47,260 INFO L87 Difference]: Start difference. First operand 100 states and 141 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:44:50,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:52,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:55,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:57,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:44:59,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:01,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:03,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:06,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:09,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:11,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:45:12,712 INFO L93 Difference]: Finished difference Result 156 states and 225 transitions. [2022-03-17 20:45:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 20:45:12,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-17 20:45:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:45:12,713 INFO L225 Difference]: With dead ends: 156 [2022-03-17 20:45:12,713 INFO L226 Difference]: Without dead ends: 141 [2022-03-17 20:45:12,714 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-17 20:45:12,714 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 63 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 174 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-03-17 20:45:12,714 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 276 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 421 Invalid, 5 Unknown, 0 Unchecked, 25.3s Time] [2022-03-17 20:45:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-17 20:45:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2022-03-17 20:45:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 80 states have internal predecessors, (94), 49 states have call successors, (49), 11 states have call predecessors, (49), 10 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-17 20:45:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2022-03-17 20:45:12,729 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 24 [2022-03-17 20:45:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:45:12,729 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2022-03-17 20:45:12,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:45:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2022-03-17 20:45:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 20:45:12,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:45:12,730 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 20:45:12,750 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 20:45:12,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:45:12,931 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:45:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:45:12,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2026335537, now seen corresponding path program 1 times [2022-03-17 20:45:12,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:45:12,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832736778] [2022-03-17 20:45:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:12,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:45:12,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:45:12,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233735802] [2022-03-17 20:45:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:12,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:45:12,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:45:12,948 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 20:45:12,949 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 20:45:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:13,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:45:13,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:45:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:45:13,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:45:13,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:45:13,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832736778] [2022-03-17 20:45:13,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:45:13,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233735802] [2022-03-17 20:45:13,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233735802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:45:13,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:45:13,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:45:13,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954275356] [2022-03-17 20:45:13,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:45:13,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:45:13,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:45:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:45:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:45:13,153 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:45:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:45:13,631 INFO L93 Difference]: Finished difference Result 140 states and 190 transitions. [2022-03-17 20:45:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:45:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-03-17 20:45:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:45:13,633 INFO L225 Difference]: With dead ends: 140 [2022-03-17 20:45:13,634 INFO L226 Difference]: Without dead ends: 116 [2022-03-17 20:45:13,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:45:13,634 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 20:45:13,635 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 20:45:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-17 20:45:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-03-17 20:45:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 70 states have internal predecessors, (83), 42 states have call successors, (42), 9 states have call predecessors, (42), 8 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-17 20:45:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 162 transitions. [2022-03-17 20:45:13,655 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 162 transitions. Word has length 31 [2022-03-17 20:45:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:45:13,656 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 162 transitions. [2022-03-17 20:45:13,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:45:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 162 transitions. [2022-03-17 20:45:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 20:45:13,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:45:13,657 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 20:45:13,665 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 20:45:13,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:45:13,862 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:45:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:45:13,862 INFO L85 PathProgramCache]: Analyzing trace with hash -266035918, now seen corresponding path program 1 times [2022-03-17 20:45:13,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:45:13,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463688675] [2022-03-17 20:45:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:13,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:45:13,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:45:13,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405859105] [2022-03-17 20:45:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:13,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:45:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:45:13,874 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 20:45:13,875 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 20:45:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:13,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:45:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:45:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 20:45:14,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:45:14,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:45:14,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463688675] [2022-03-17 20:45:14,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:45:14,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405859105] [2022-03-17 20:45:14,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405859105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:45:14,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:45:14,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:45:14,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513408423] [2022-03-17 20:45:14,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:45:14,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:45:14,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:45:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:45:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:45:14,022 INFO L87 Difference]: Start difference. First operand 116 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:45:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:45:14,569 INFO L93 Difference]: Finished difference Result 138 states and 180 transitions. [2022-03-17 20:45:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:45:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-03-17 20:45:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:45:14,570 INFO L225 Difference]: With dead ends: 138 [2022-03-17 20:45:14,570 INFO L226 Difference]: Without dead ends: 134 [2022-03-17 20:45:14,571 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:45:14,571 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 20:45:14,571 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 172 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 20:45:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-17 20:45:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-03-17 20:45:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.155844155844156) internal successors, (89), 80 states have internal predecessors, (89), 40 states have call successors, (40), 14 states have call predecessors, (40), 13 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-17 20:45:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2022-03-17 20:45:14,582 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 34 [2022-03-17 20:45:14,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:45:14,583 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2022-03-17 20:45:14,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:45:14,583 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2022-03-17 20:45:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 20:45:14,584 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:45:14,584 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:45:14,589 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 20:45:14,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:45:14,785 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:45:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:45:14,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1209382940, now seen corresponding path program 1 times [2022-03-17 20:45:14,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:45:14,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644011659] [2022-03-17 20:45:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:14,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:45:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:14,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:45:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:14,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:45:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:45:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:45:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644011659] [2022-03-17 20:45:14,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644011659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:45:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756491051] [2022-03-17 20:45:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:45:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:45:14,879 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 20:45:14,891 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 20:45:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 20:45:14,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:45:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:45:15,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:45:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:45:15,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756491051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:45:15,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:45:15,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-17 20:45:15,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820243518] [2022-03-17 20:45:15,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:45:15,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 20:45:15,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:45:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 20:45:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:45:15,077 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:45:18,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:21,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:23,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:27,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:29,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:31,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:45:32,181 INFO L93 Difference]: Finished difference Result 177 states and 226 transitions. [2022-03-17 20:45:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 20:45:32,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-03-17 20:45:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:45:32,184 INFO L225 Difference]: With dead ends: 177 [2022-03-17 20:45:32,184 INFO L226 Difference]: Without dead ends: 137 [2022-03-17 20:45:32,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-17 20:45:32,185 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 44 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:45:32,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 132 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 243 Invalid, 5 Unknown, 0 Unchecked, 17.0s Time] [2022-03-17 20:45:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-17 20:45:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-03-17 20:45:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 80 states have (on average 1.1625) internal successors, (93), 83 states have internal predecessors, (93), 40 states have call successors, (40), 14 states have call predecessors, (40), 13 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-17 20:45:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 170 transitions. [2022-03-17 20:45:32,196 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 170 transitions. Word has length 32 [2022-03-17 20:45:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:45:32,196 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 170 transitions. [2022-03-17 20:45:32,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:45:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 170 transitions. [2022-03-17 20:45:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 20:45:32,197 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:45:32,197 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:45:32,220 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 20:45:32,398 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,SelfDestructingSolverStorable9 [2022-03-17 20:45:32,398 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:45:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:45:32,399 INFO L85 PathProgramCache]: Analyzing trace with hash -55903719, now seen corresponding path program 2 times [2022-03-17 20:45:32,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:45:32,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278919934] [2022-03-17 20:45:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:45:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:32,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:45:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:32,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:45:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:45:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-17 20:45:32,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:45:32,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278919934] [2022-03-17 20:45:32,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278919934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:45:32,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:45:32,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:45:32,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647357139] [2022-03-17 20:45:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:45:32,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:45:32,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:45:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:45:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:45:32,458 INFO L87 Difference]: Start difference. First operand 134 states and 170 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:45:35,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:45:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:45:35,800 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2022-03-17 20:45:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:45:35,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-03-17 20:45:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:45:35,801 INFO L225 Difference]: With dead ends: 171 [2022-03-17 20:45:35,801 INFO L226 Difference]: Without dead ends: 131 [2022-03-17 20:45:35,802 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 20:45:35,802 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-17 20:45:35,802 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 106 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 101 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-03-17 20:45:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-17 20:45:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-03-17 20:45:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 75 states have internal predecessors, (84), 39 states have call successors, (39), 14 states have call predecessors, (39), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-17 20:45:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 159 transitions. [2022-03-17 20:45:35,810 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 159 transitions. Word has length 35 [2022-03-17 20:45:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:45:35,810 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 159 transitions. [2022-03-17 20:45:35,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:45:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 159 transitions. [2022-03-17 20:45:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 20:45:35,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:45:35,811 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 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 20:45:35,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-17 20:45:35,811 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:45:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:45:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash -926681017, now seen corresponding path program 1 times [2022-03-17 20:45:35,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:45:35,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207084424] [2022-03-17 20:45:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:35,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:45:35,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:45:35,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85023890] [2022-03-17 20:45:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:45:35,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:45:35,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:45:35,818 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 20:45:35,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process