/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/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:42:06,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:42:06,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:42:06,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:42:06,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:42:06,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:42:06,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:42:06,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:42:06,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:42:06,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:42:06,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:42:06,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:42:06,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:42:06,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:42:06,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:42:06,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:42:06,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:42:06,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:42:06,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:42:06,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:42:06,789 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:42:06,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:42:06,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:42:06,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:42:06,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:42:06,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 19:42:06,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:42:06,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:42:06,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:42:06,804 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 19:42:06,823 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:42:06,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:42:06,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:42:06,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:42:06,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:42:06,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:42:06,825 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:42:06,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:42:06,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:42:06,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:42:06,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:42:06,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:42:06,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:42:06,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:42:06,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:42:06,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:42:06,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:42:06,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:42:06,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:42:06,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:42:06,828 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:42:06,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:42:07,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:42:07,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:42:07,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:42:07,035 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:42:07,035 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:42:07,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2022-03-17 19:42:07,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442af27ce/b28d7ec17f8e45718540275bb8da2048/FLAG4bc3e1b92 [2022-03-17 19:42:07,470 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:42:07,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2022-03-17 19:42:07,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442af27ce/b28d7ec17f8e45718540275bb8da2048/FLAG4bc3e1b92 [2022-03-17 19:42:07,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442af27ce/b28d7ec17f8e45718540275bb8da2048 [2022-03-17 19:42:07,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:42:07,494 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:42:07,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:42:07,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:42:07,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:42:07,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cd1696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07, skipping insertion in model container [2022-03-17 19:42:07,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:42:07,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:42:07,676 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i[895,908] [2022-03-17 19:42:07,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:42:07,692 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:42:07,701 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i[895,908] [2022-03-17 19:42:07,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:42:07,713 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:42:07,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07 WrapperNode [2022-03-17 19:42:07,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:42:07,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:42:07,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:42:07,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:42:07,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:42:07,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:42:07,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:42:07,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:42:07,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (1/1) ... [2022-03-17 19:42:07,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:42:07,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:07,777 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 19:42:07,791 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 19:42:07,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:42:07,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:42:07,817 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:42:07,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 19:42:07,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:42:07,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:42:07,818 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:42:07,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:42:07,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 19:42:07,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 19:42:07,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:42:07,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:42:07,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 19:42:07,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:42:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 19:42:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:42:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:42:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:42:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:42:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:42:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:42:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:42:07,870 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:42:07,871 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:42:08,002 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:42:08,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:42:08,006 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 19:42:08,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:42:08 BoogieIcfgContainer [2022-03-17 19:42:08,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:42:08,008 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:42:08,008 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:42:08,008 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:42:08,011 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:42:08" (1/1) ... [2022-03-17 19:42:08,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:42:08 BasicIcfg [2022-03-17 19:42:08,019 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:42:08,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:42:08,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:42:08,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:42:08,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:42:07" (1/4) ... [2022-03-17 19:42:08,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369b8a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:42:08, skipping insertion in model container [2022-03-17 19:42:08,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:42:07" (2/4) ... [2022-03-17 19:42:08,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369b8a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:42:08, skipping insertion in model container [2022-03-17 19:42:08,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:42:08" (3/4) ... [2022-03-17 19:42:08,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369b8a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:42:08, skipping insertion in model container [2022-03-17 19:42:08,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:42:08" (4/4) ... [2022-03-17 19:42:08,041 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.iqvasr [2022-03-17 19:42:08,044 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:42:08,044 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:42:08,110 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:42:08,130 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 19:42:08,130 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:42:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:42:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:42:08,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:08,150 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:08,150 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash -27272427, now seen corresponding path program 1 times [2022-03-17 19:42:08,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:08,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124585296] [2022-03-17 19:42:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:08,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,298 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 19:42:08,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124585296] [2022-03-17 19:42:08,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124585296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:42:08,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:42:08,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 19:42:08,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117162805] [2022-03-17 19:42:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:42:08,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:42:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:08,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:42:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:42:08,330 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:08,364 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-03-17 19:42:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:42:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 19:42:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:08,373 INFO L225 Difference]: With dead ends: 33 [2022-03-17 19:42:08,373 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 19:42:08,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 19:42:08,378 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:08,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:42:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 19:42:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 19:42:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 19:42:08,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 19:42:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:08,405 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 19:42:08,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 19:42:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:42:08,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:08,407 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:08,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:42:08,408 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1365319963, now seen corresponding path program 1 times [2022-03-17 19:42:08,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:08,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395283897] [2022-03-17 19:42:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:08,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,499 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 19:42:08,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:08,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395283897] [2022-03-17 19:42:08,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395283897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:42:08,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:42:08,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 19:42:08,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717590058] [2022-03-17 19:42:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:42:08,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 19:42:08,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 19:42:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:42:08,504 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:08,565 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-03-17 19:42:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 19:42:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 19:42:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:08,567 INFO L225 Difference]: With dead ends: 24 [2022-03-17 19:42:08,567 INFO L226 Difference]: Without dead ends: 19 [2022-03-17 19:42:08,573 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 19:42:08,574 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:08,575 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:42:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-17 19:42:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-03-17 19:42:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-17 19:42:08,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-17 19:42:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:08,580 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-17 19:42:08,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-17 19:42:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:42:08,580 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:08,580 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:08,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:42:08,581 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1393949114, now seen corresponding path program 1 times [2022-03-17 19:42:08,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:08,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968308730] [2022-03-17 19:42:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,633 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 19:42:08,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:08,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968308730] [2022-03-17 19:42:08,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968308730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:42:08,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:42:08,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:42:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353038720] [2022-03-17 19:42:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:42:08,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:42:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:42:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:42:08,636 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:08,663 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-17 19:42:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:42:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 19:42:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:08,664 INFO L225 Difference]: With dead ends: 28 [2022-03-17 19:42:08,665 INFO L226 Difference]: Without dead ends: 20 [2022-03-17 19:42:08,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:42:08,671 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:08,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:42:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-17 19:42:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-17 19:42:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-17 19:42:08,682 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2022-03-17 19:42:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:08,682 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-17 19:42:08,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-17 19:42:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-17 19:42:08,683 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:08,684 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:08,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 19:42:08,684 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1701781083, now seen corresponding path program 1 times [2022-03-17 19:42:08,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:08,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534940498] [2022-03-17 19:42:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:08,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:42:08,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534940498] [2022-03-17 19:42:08,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534940498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612071278] [2022-03-17 19:42:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:08,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:08,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:08,746 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 19:42:08,747 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 19:42:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:08,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 19:42:08,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:42:08,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:42:08,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612071278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:08,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:08,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 19:42:08,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8034745] [2022-03-17 19:42:08,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:08,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 19:42:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 19:42:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 19:42:08,902 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:08,973 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-03-17 19:42:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 19:42:08,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-17 19:42:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:08,975 INFO L225 Difference]: With dead ends: 38 [2022-03-17 19:42:08,975 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 19:42:08,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-17 19:42:08,976 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:08,976 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:42:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 19:42:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-03-17 19:42:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-17 19:42:08,980 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2022-03-17 19:42:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:08,981 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-17 19:42:08,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-17 19:42:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 19:42:08,981 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:08,981 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:09,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 19:42:09,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:09,195 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash -508194182, now seen corresponding path program 2 times [2022-03-17 19:42:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:09,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155576603] [2022-03-17 19:42:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:09,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:42:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155576603] [2022-03-17 19:42:09,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155576603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321778683] [2022-03-17 19:42:09,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:42:09,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:09,270 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 19:42:09,271 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 19:42:09,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:42:09,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 19:42:09,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 19:42:09,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 19:42:09,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321778683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:09,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:09,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-03-17 19:42:09,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069876084] [2022-03-17 19:42:09,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:09,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 19:42:09,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 19:42:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 19:42:09,414 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:09,539 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-03-17 19:42:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 19:42:09,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-17 19:42:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:09,540 INFO L225 Difference]: With dead ends: 44 [2022-03-17 19:42:09,540 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 19:42:09,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2022-03-17 19:42:09,541 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:09,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:42:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 19:42:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-17 19:42:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-03-17 19:42:09,551 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2022-03-17 19:42:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:09,551 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-03-17 19:42:09,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-03-17 19:42:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 19:42:09,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:09,552 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:09,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:42:09,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:09,767 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1754997211, now seen corresponding path program 3 times [2022-03-17 19:42:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761331190] [2022-03-17 19:42:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:09,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 19:42:09,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:09,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761331190] [2022-03-17 19:42:09,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761331190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:09,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287446113] [2022-03-17 19:42:09,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:42:09,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:09,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:09,862 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 19:42:09,864 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 19:42:09,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-17 19:42:09,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:09,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 19:42:09,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 19:42:09,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 19:42:10,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287446113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:10,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:10,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-03-17 19:42:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296557194] [2022-03-17 19:42:10,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:10,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 19:42:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 19:42:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-17 19:42:10,040 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:10,164 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-03-17 19:42:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 19:42:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-17 19:42:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:10,164 INFO L225 Difference]: With dead ends: 55 [2022-03-17 19:42:10,165 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 19:42:10,165 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-03-17 19:42:10,165 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:10,166 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:42:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 19:42:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-17 19:42:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-17 19:42:10,170 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2022-03-17 19:42:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:10,171 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-17 19:42:10,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-17 19:42:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 19:42:10,171 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:10,172 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:10,188 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 19:42:10,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:10,389 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:10,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1007935590, now seen corresponding path program 4 times [2022-03-17 19:42:10,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:10,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075455686] [2022-03-17 19:42:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:10,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:10,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:42:10,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:10,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075455686] [2022-03-17 19:42:10,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075455686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:10,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688833669] [2022-03-17 19:42:10,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:42:10,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:10,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:10,456 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 19:42:10,457 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 19:42:10,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:42:10,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:10,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 19:42:10,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:42:10,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:42:10,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688833669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:10,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:10,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-17 19:42:10,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523931696] [2022-03-17 19:42:10,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:10,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 19:42:10,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:10,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 19:42:10,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-17 19:42:10,654 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:10,823 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-17 19:42:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 19:42:10,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-17 19:42:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:10,824 INFO L225 Difference]: With dead ends: 78 [2022-03-17 19:42:10,824 INFO L226 Difference]: Without dead ends: 63 [2022-03-17 19:42:10,824 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-17 19:42:10,825 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:10,825 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:42:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-17 19:42:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-17 19:42:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-17 19:42:10,830 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 37 [2022-03-17 19:42:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:10,831 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-17 19:42:10,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-17 19:42:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 19:42:10,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:10,832 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:10,853 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 19:42:11,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:11,052 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1175433498, now seen corresponding path program 5 times [2022-03-17 19:42:11,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:11,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385872611] [2022-03-17 19:42:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:11,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:11,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 301 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:42:11,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385872611] [2022-03-17 19:42:11,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385872611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773090674] [2022-03-17 19:42:11,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 19:42:11,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:11,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:11,218 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 19:42:11,219 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 19:42:11,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-17 19:42:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:11,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 19:42:11,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 301 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:42:11,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 301 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:42:11,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773090674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:11,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:11,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-17 19:42:11,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36582894] [2022-03-17 19:42:11,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:11,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-17 19:42:11,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:11,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-17 19:42:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 19:42:11,651 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:12,131 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2022-03-17 19:42:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-17 19:42:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-17 19:42:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:12,136 INFO L225 Difference]: With dead ends: 126 [2022-03-17 19:42:12,137 INFO L226 Difference]: Without dead ends: 111 [2022-03-17 19:42:12,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2022-03-17 19:42:12,139 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:12,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 45 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:42:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-17 19:42:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-03-17 19:42:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-17 19:42:12,156 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 61 [2022-03-17 19:42:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:12,157 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-17 19:42:12,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-17 19:42:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-17 19:42:12,158 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:12,158 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 30, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:12,193 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 19:42:12,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:12,373 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 136401946, now seen corresponding path program 6 times [2022-03-17 19:42:12,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:12,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028338386] [2022-03-17 19:42:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:12,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 214 proven. 1365 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:42:12,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028338386] [2022-03-17 19:42:12,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028338386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752873379] [2022-03-17 19:42:12,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 19:42:12,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:12,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:12,693 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 19:42:12,695 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 19:42:12,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-17 19:42:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 19:42:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 508 proven. 17 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2022-03-17 19:42:12,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 508 proven. 17 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2022-03-17 19:42:13,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752873379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:13,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:13,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 6, 6] total 38 [2022-03-17 19:42:13,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213126249] [2022-03-17 19:42:13,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:13,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-17 19:42:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-17 19:42:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 19:42:13,013 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:13,584 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2022-03-17 19:42:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-17 19:42:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-03-17 19:42:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:13,587 INFO L225 Difference]: With dead ends: 139 [2022-03-17 19:42:13,587 INFO L226 Difference]: Without dead ends: 124 [2022-03-17 19:42:13,589 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1925, Invalid=3775, Unknown=0, NotChecked=0, Total=5700 [2022-03-17 19:42:13,590 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:13,590 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:42:13,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-17 19:42:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2022-03-17 19:42:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-03-17 19:42:13,624 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2022-03-17 19:42:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:13,624 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-03-17 19:42:13,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-03-17 19:42:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-17 19:42:13,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:13,627 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 31, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:13,646 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 19:42:13,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:13,828 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1200165189, now seen corresponding path program 7 times [2022-03-17 19:42:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816722869] [2022-03-17 19:42:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:13,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:14,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 316 proven. 1457 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 19:42:14,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816722869] [2022-03-17 19:42:14,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816722869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850631126] [2022-03-17 19:42:14,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 19:42:14,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:14,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:14,327 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 19:42:14,328 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 19:42:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:14,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 19:42:14,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 316 proven. 1457 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 19:42:14,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 316 proven. 1457 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 19:42:15,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850631126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:15,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:15,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 54 [2022-03-17 19:42:15,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335914148] [2022-03-17 19:42:15,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:15,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-17 19:42:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-17 19:42:15,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-17 19:42:15,403 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 53 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:16,546 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2022-03-17 19:42:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 19:42:16,547 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 53 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-03-17 19:42:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:16,548 INFO L225 Difference]: With dead ends: 193 [2022-03-17 19:42:16,548 INFO L226 Difference]: Without dead ends: 175 [2022-03-17 19:42:16,551 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-03-17 19:42:16,551 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:16,551 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 30 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:42:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-17 19:42:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-03-17 19:42:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 168 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-03-17 19:42:16,559 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 115 [2022-03-17 19:42:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:16,559 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-03-17 19:42:16,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 53 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-03-17 19:42:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-03-17 19:42:16,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:16,561 INFO L500 BasicCegarLoop]: trace histogram [54, 53, 50, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:16,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 19:42:16,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:16,777 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2079146812, now seen corresponding path program 8 times [2022-03-17 19:42:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:16,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635493657] [2022-03-17 19:42:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:16,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 1145 proven. 34 refuted. 0 times theorem prover too weak. 3114 trivial. 0 not checked. [2022-03-17 19:42:16,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635493657] [2022-03-17 19:42:16,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635493657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480136069] [2022-03-17 19:42:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:42:16,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:16,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:16,915 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 19:42:16,916 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 19:42:16,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:42:16,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:16,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-17 19:42:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 4249 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 19:42:18,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 4249 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 19:42:19,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480136069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:19,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:19,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 53, 53] total 100 [2022-03-17 19:42:19,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585160604] [2022-03-17 19:42:19,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:19,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-17 19:42:19,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:19,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-17 19:42:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-03-17 19:42:19,022 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 100 states, 100 states have (on average 3.12) internal successors, (312), 99 states have internal predecessors, (312), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:20,201 INFO L93 Difference]: Finished difference Result 789 states and 1027 transitions. [2022-03-17 19:42:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-17 19:42:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.12) internal successors, (312), 99 states have internal predecessors, (312), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-03-17 19:42:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:20,204 INFO L225 Difference]: With dead ends: 789 [2022-03-17 19:42:20,205 INFO L226 Difference]: Without dead ends: 784 [2022-03-17 19:42:20,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6030 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=10053, Invalid=12899, Unknown=0, NotChecked=0, Total=22952 [2022-03-17 19:42:20,210 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:20,210 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 78 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 19:42:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-03-17 19:42:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 314. [2022-03-17 19:42:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.168284789644013) internal successors, (361), 309 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 365 transitions. [2022-03-17 19:42:20,224 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 365 transitions. Word has length 172 [2022-03-17 19:42:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:20,225 INFO L478 AbstractCegarLoop]: Abstraction has 314 states and 365 transitions. [2022-03-17 19:42:20,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.12) internal successors, (312), 99 states have internal predecessors, (312), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 365 transitions. [2022-03-17 19:42:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-03-17 19:42:20,228 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:20,228 INFO L500 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:20,245 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 19:42:20,443 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,SelfDestructingSolverStorable10 [2022-03-17 19:42:20,444 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash 727187930, now seen corresponding path program 9 times [2022-03-17 19:42:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:20,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787839425] [2022-03-17 19:42:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:20,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:42:23,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:23,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787839425] [2022-03-17 19:42:23,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787839425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:23,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135705948] [2022-03-17 19:42:23,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:42:23,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:23,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:23,536 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:42:23,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 19:42:23,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2022-03-17 19:42:23,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:23,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-17 19:42:23,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3876 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-03-17 19:42:24,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3876 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-03-17 19:42:25,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135705948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:25,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:25,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 57, 57] total 109 [2022-03-17 19:42:25,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384838704] [2022-03-17 19:42:25,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:25,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-17 19:42:25,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:25,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-17 19:42:25,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=10279, Unknown=0, NotChecked=0, Total=11772 [2022-03-17 19:42:25,220 INFO L87 Difference]: Start difference. First operand 314 states and 365 transitions. Second operand has 109 states, 109 states have (on average 2.908256880733945) internal successors, (317), 106 states have internal predecessors, (317), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:33,646 INFO L93 Difference]: Finished difference Result 4399 states and 5826 transitions. [2022-03-17 19:42:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-17 19:42:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.908256880733945) internal successors, (317), 106 states have internal predecessors, (317), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-03-17 19:42:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:33,657 INFO L225 Difference]: With dead ends: 4399 [2022-03-17 19:42:33,657 INFO L226 Difference]: Without dead ends: 4237 [2022-03-17 19:42:33,662 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 670 SyntacticMatches, 6 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8723 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4466, Invalid=40690, Unknown=0, NotChecked=0, Total=45156 [2022-03-17 19:42:33,662 INFO L912 BasicCegarLoop]: 159 mSDtfsCounter, 316 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 15318 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 15477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 15318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:33,663 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 456 Invalid, 15477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [159 Valid, 15318 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-17 19:42:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2022-03-17 19:42:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 4188. [2022-03-17 19:42:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4183 states have (on average 1.0241453502271098) internal successors, (4284), 4183 states have internal predecessors, (4284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 4288 transitions. [2022-03-17 19:42:33,865 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 4288 transitions. Word has length 313 [2022-03-17 19:42:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:33,865 INFO L478 AbstractCegarLoop]: Abstraction has 4188 states and 4288 transitions. [2022-03-17 19:42:33,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.908256880733945) internal successors, (317), 106 states have internal predecessors, (317), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 4288 transitions. [2022-03-17 19:42:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-03-17 19:42:33,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:33,868 INFO L500 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:33,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 19:42:34,084 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:34,084 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash 635638076, now seen corresponding path program 10 times [2022-03-17 19:42:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:34,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031401169] [2022-03-17 19:42:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:35,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-17 19:42:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031401169] [2022-03-17 19:42:35,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031401169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576095795] [2022-03-17 19:42:35,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:42:35,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:35,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:35,135 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:42:35,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 19:42:35,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:42:35,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-17 19:42:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-17 19:42:35,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:42:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-17 19:42:36,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576095795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:42:36,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:42:36,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 56 [2022-03-17 19:42:36,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448386187] [2022-03-17 19:42:36,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:42:36,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-17 19:42:36,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-17 19:42:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=1594, Unknown=0, NotChecked=0, Total=3080 [2022-03-17 19:42:36,139 INFO L87 Difference]: Start difference. First operand 4188 states and 4288 transitions. Second operand has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:37,493 INFO L93 Difference]: Finished difference Result 8375 states and 8576 transitions. [2022-03-17 19:42:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-17 19:42:37,493 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2022-03-17 19:42:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:37,502 INFO L225 Difference]: With dead ends: 8375 [2022-03-17 19:42:37,502 INFO L226 Difference]: Without dead ends: 4191 [2022-03-17 19:42:37,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 682 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4452, Invalid=7320, Unknown=0, NotChecked=0, Total=11772 [2022-03-17 19:42:37,510 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:37,510 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 34 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:42:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2022-03-17 19:42:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 4191. [2022-03-17 19:42:37,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4186 states have (on average 1.0241280458671762) internal successors, (4287), 4186 states have internal predecessors, (4287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4291 transitions. [2022-03-17 19:42:37,696 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4291 transitions. Word has length 316 [2022-03-17 19:42:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:37,697 INFO L478 AbstractCegarLoop]: Abstraction has 4191 states and 4291 transitions. [2022-03-17 19:42:37,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4291 transitions. [2022-03-17 19:42:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-03-17 19:42:37,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:42:37,699 INFO L500 BasicCegarLoop]: trace histogram [103, 102, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:42:37,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 19:42:37,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 19:42:37,916 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:42:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:42:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash 293034619, now seen corresponding path program 11 times [2022-03-17 19:42:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:42:37,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733933611] [2022-03-17 19:42:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:42:37,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:42:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:38,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:42:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:42:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11580 proven. 149 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2022-03-17 19:42:38,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:42:38,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733933611] [2022-03-17 19:42:38,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733933611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:42:38,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038939512] [2022-03-17 19:42:38,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 19:42:38,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:42:38,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:42:38,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:42:38,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 19:42:39,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2022-03-17 19:42:39,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:42:39,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-17 19:42:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:42:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11729 proven. 0 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2022-03-17 19:42:39,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:42:39,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038939512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:42:39,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:42:39,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [54] total 55 [2022-03-17 19:42:39,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265503319] [2022-03-17 19:42:39,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:42:39,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-17 19:42:39,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:42:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-17 19:42:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2022-03-17 19:42:39,597 INFO L87 Difference]: Start difference. First operand 4191 states and 4291 transitions. Second operand has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:42:39,785 INFO L93 Difference]: Finished difference Result 4191 states and 4291 transitions. [2022-03-17 19:42:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 19:42:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-03-17 19:42:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:42:39,786 INFO L225 Difference]: With dead ends: 4191 [2022-03-17 19:42:39,786 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 19:42:39,790 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2022-03-17 19:42:39,791 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:42:39,791 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 254 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:42:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 19:42:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 19:42:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 19:42:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 19:42:39,792 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 319 [2022-03-17 19:42:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:42:39,792 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 19:42:39,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:42:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 19:42:39,792 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 19:42:39,794 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 19:42:39,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 19:42:40,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 19:42:40,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 19:42:44,145 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 19:42:44,145 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 19:42:44,145 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 19:42:44,145 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 19:42:44,145 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 19:42:44,145 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 19:42:44,145 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 19:42:44,145 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 39) the Hoare annotation is: true [2022-03-17 19:42:44,146 INFO L878 garLoopResultBuilder]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse27 (<= main_~y~0 3)) (.cse28 (<= 3 main_~y~0)) (.cse10 (<= main_~y~0 30)) (.cse11 (<= 30 main_~y~0)) (.cse12 (= main_~y~0 0)) (.cse35 (<= 1 main_~y~0)) (.cse36 (<= main_~y~0 1)) (.cse51 (<= main_~y~0 34)) (.cse52 (<= 34 main_~y~0)) (.cse4 (<= main_~y~0 11)) (.cse5 (<= 11 main_~y~0)) (.cse47 (<= main_~y~0 4)) (.cse48 (<= 4 main_~y~0)) (.cse2 (<= main_~y~0 46)) (.cse3 (<= 46 main_~y~0)) (.cse8 (<= main_~y~0 8)) (.cse9 (<= 8 main_~y~0)) (.cse53 (<= 49 main_~y~0)) (.cse54 (<= main_~y~0 49)) (.cse19 (<= 16 main_~y~0)) (.cse20 (<= main_~y~0 16)) (.cse43 (<= 25 main_~y~0)) (.cse44 (<= main_~y~0 25)) (.cse21 (<= main_~y~0 28)) (.cse22 (<= 28 main_~y~0)) (.cse73 (<= main_~y~0 23)) (.cse74 (<= 23 main_~y~0)) (.cse55 (<= main_~y~0 27)) (.cse56 (<= 27 main_~y~0)) (.cse71 (<= 35 main_~y~0)) (.cse72 (<= main_~y~0 35)) (.cse25 (<= 7 main_~y~0)) (.cse26 (<= main_~y~0 7)) (.cse61 (<= 36 main_~y~0)) (.cse62 (<= main_~y~0 36)) (.cse29 (<= main_~y~0 44)) (.cse30 (<= 44 main_~y~0)) (.cse89 (<= 18 main_~y~0)) (.cse90 (<= main_~y~0 18)) (.cse93 (<= 2 main_~y~0)) (.cse94 (<= main_~y~0 2)) (.cse91 (<= main_~y~0 21)) (.cse92 (<= 21 main_~y~0)) (.cse31 (<= main_~y~0 10)) (.cse32 (<= 10 main_~y~0)) (.cse69 (<= main_~y~0 17)) (.cse70 (<= 17 main_~y~0)) (.cse67 (<= 9 main_~y~0)) (.cse68 (<= main_~y~0 9)) (.cse41 (<= main_~y~0 31)) (.cse42 (<= 31 main_~y~0)) (.cse6 (<= main_~y~0 32)) (.cse7 (<= 32 main_~y~0)) (.cse49 (<= 19 main_~y~0)) (.cse50 (<= main_~y~0 19)) (.cse77 (<= main_~y~0 22)) (.cse78 (<= 22 main_~y~0)) (.cse79 (<= 24 main_~y~0)) (.cse80 (<= main_~y~0 24)) (.cse83 (<= 38 main_~y~0)) (.cse84 (<= main_~y~0 38)) (.cse81 (<= 48 main_~y~0)) (.cse82 (<= main_~y~0 48)) (.cse33 (<= 20 main_~y~0)) (.cse34 (<= main_~y~0 20)) (.cse87 (<= 43 main_~y~0)) (.cse88 (<= main_~y~0 43)) (.cse95 (<= 5 main_~y~0)) (.cse96 (<= main_~y~0 5)) (.cse39 (<= main_~y~0 6)) (.cse40 (<= 6 main_~y~0)) (.cse15 (<= main_~y~0 13)) (.cse16 (<= 13 main_~y~0)) (.cse85 (<= main_~y~0 47)) (.cse86 (<= 47 main_~y~0)) (.cse17 (<= 39 main_~y~0)) (.cse18 (<= main_~y~0 39)) (.cse45 (<= 33 main_~y~0)) (.cse46 (<= main_~y~0 33)) (.cse57 (<= 40 main_~y~0)) (.cse58 (<= main_~y~0 40)) (.cse59 (<= main_~y~0 45)) (.cse60 (<= 45 main_~y~0)) (.cse75 (<= 29 main_~y~0)) (.cse76 (<= main_~y~0 29)) (.cse65 (<= 14 main_~y~0)) (.cse66 (<= main_~y~0 14)) (.cse37 (<= 12 main_~y~0)) (.cse38 (<= main_~y~0 12)) (.cse13 (<= main_~y~0 15)) (.cse14 (<= 15 main_~y~0)) (.cse23 (<= main_~y~0 37)) (.cse24 (<= 37 main_~y~0)) (.cse63 (<= main_~y~0 26)) (.cse64 (<= 26 main_~y~0)) (.cse97 (<= 41 main_~y~0)) (.cse98 (<= main_~y~0 41)) (.cse0 (<= main_~y~0 42)) (.cse1 (<= 42 main_~y~0))) (or (and (<= main_~x~0 42) .cse0 (<= 42 main_~x~0) .cse1) (and (<= main_~x~0 54) .cse2 .cse3 (<= 54 main_~x~0)) (and (<= 50 main_~y~0) (<= main_~x~0 50) (<= 50 main_~x~0) (<= main_~y~0 50)) (and .cse4 (<= main_~x~0 11) (<= 11 main_~x~0) .cse5) (and (<= main_~x~0 68) (<= 68 main_~x~0) .cse6 .cse7) (and (<= main_~x~0 92) (<= 92 main_~x~0) .cse8 .cse9) (and .cse10 (<= 30 main_~x~0) (<= main_~x~0 30) .cse11) (and (= main_~x~0 0) .cse12) (and .cse13 .cse14 (<= 85 main_~x~0) (<= main_~x~0 85)) (and .cse15 (<= main_~x~0 13) (<= 13 main_~x~0) .cse16) (and (<= main_~x~0 61) (<= 61 main_~x~0) .cse17 .cse18) (and .cse19 (<= main_~x~0 16) .cse20 (<= 16 main_~x~0)) (and .cse21 (<= 72 main_~x~0) (<= main_~x~0 72) .cse22) (and (<= main_~x~0 63) (<= 63 main_~x~0) .cse23 .cse24) (and .cse25 .cse26 (<= main_~x~0 7) (<= 7 main_~x~0)) (and .cse27 .cse28 (<= main_~x~0 3) (<= 3 main_~x~0)) (and .cse29 .cse30 (<= main_~x~0 56) (<= 56 main_~x~0)) (and (<= 97 main_~x~0) .cse27 .cse28 (<= main_~x~0 97)) (and .cse31 .cse32 (<= 90 main_~x~0) (<= main_~x~0 90)) (and .cse10 (<= main_~x~0 70) (<= 70 main_~x~0) .cse11) (and (<= main_~x~0 20) (<= 20 main_~x~0) .cse33 .cse34) (and (<= main_~x~0 99) (<= 99 main_~x~0) .cse35 .cse36) (and .cse37 (<= main_~x~0 88) .cse38 (<= 88 main_~x~0)) (and (<= 6 main_~x~0) .cse39 (<= main_~x~0 6) .cse40) (and (<= main_~x~0 69) .cse41 .cse42 (<= 69 main_~x~0)) (and .cse43 .cse44 (<= main_~x~0 25) (<= 25 main_~x~0)) (and .cse45 .cse46 (<= 67 main_~x~0) (<= main_~x~0 67)) (and .cse47 (<= 96 main_~x~0) .cse48 (<= main_~x~0 96)) (and (< 99 main_~x~0) .cse12 (<= main_~x~0 100)) (and .cse49 (<= main_~x~0 81) (<= 81 main_~x~0) .cse50) (and .cse51 (<= 66 main_~x~0) (<= main_~x~0 66) .cse52) (and (<= 1 main_~x~0) (<= main_~x~0 1) .cse35 .cse36) (and .cse53 (<= main_~x~0 51) (<= 51 main_~x~0) .cse54) (and (<= main_~x~0 73) .cse55 (<= 73 main_~x~0) .cse56) (and .cse51 (<= main_~x~0 34) (<= 34 main_~x~0) .cse52) (and .cse57 (<= main_~x~0 60) .cse58 (<= 60 main_~x~0)) (and .cse4 (<= 89 main_~x~0) (<= main_~x~0 89) .cse5) (and .cse59 .cse60 (<= main_~x~0 45) (<= 45 main_~x~0)) (and (<= main_~x~0 64) .cse61 .cse62 (<= 64 main_~x~0)) (and (<= 74 main_~x~0) .cse63 (<= main_~x~0 74) .cse64) (and .cse65 .cse66 (<= main_~x~0 86) (<= 86 main_~x~0)) (and (<= main_~x~0 4) .cse47 .cse48 (<= 4 main_~x~0)) (and (<= 46 main_~x~0) .cse2 .cse3 (<= main_~x~0 46)) (and .cse8 (<= main_~x~0 8) (<= 8 main_~x~0) .cse9) (and (<= main_~x~0 49) .cse53 (<= 49 main_~x~0) .cse54) (and (<= main_~x~0 91) .cse67 .cse68 (<= 91 main_~x~0)) (and (<= 84 main_~x~0) .cse19 (<= main_~x~0 84) .cse20) (and (<= main_~x~0 83) .cse69 (<= 83 main_~x~0) .cse70) (and (<= 75 main_~x~0) .cse43 (<= main_~x~0 75) .cse44) (and (<= 28 main_~x~0) .cse21 (<= main_~x~0 28) .cse22) (and (<= 35 main_~x~0) (<= main_~x~0 35) .cse71 .cse72) (and .cse73 (<= 23 main_~x~0) .cse74 (<= main_~x~0 23)) (and (<= main_~x~0 29) .cse75 .cse76 (<= 29 main_~x~0)) (and (<= 78 main_~x~0) .cse77 .cse78 (<= main_~x~0 78)) (and (<= main_~x~0 24) .cse79 (<= 24 main_~x~0) .cse80) (and .cse73 (<= main_~x~0 77) .cse74 (<= 77 main_~x~0)) (and (<= main_~x~0 52) (<= 52 main_~x~0) .cse81 .cse82) (and (<= main_~x~0 38) .cse83 .cse84 (<= 38 main_~x~0)) (and .cse55 (<= 27 main_~x~0) .cse56 (<= main_~x~0 27)) (and (<= 47 main_~x~0) .cse85 (<= main_~x~0 47) .cse86) (and (<= 65 main_~x~0) (<= main_~x~0 65) .cse71 .cse72) (and (<= 57 main_~x~0) .cse87 (<= main_~x~0 57) .cse88) (and .cse89 (<= 82 main_~x~0) (<= main_~x~0 82) .cse90) (and .cse25 .cse26 (<= main_~x~0 93) (<= 93 main_~x~0)) (and (<= main_~x~0 36) (<= 36 main_~x~0) .cse61 .cse62) (and (<= 21 main_~x~0) .cse91 (<= main_~x~0 21) .cse92) (and .cse29 .cse30 (<= 44 main_~x~0) (<= main_~x~0 44)) (and .cse93 .cse94 (<= 2 main_~x~0) (<= main_~x~0 2)) (and .cse89 (<= main_~x~0 18) (<= 18 main_~x~0) .cse90) (and .cse93 .cse94 (<= 98 main_~x~0) (<= main_~x~0 98)) (and (<= main_~x~0 79) (<= 79 main_~x~0) .cse91 .cse92) (and .cse31 .cse32 (<= main_~x~0 10) (<= 10 main_~x~0)) (and .cse69 .cse70 (<= 17 main_~x~0) (<= main_~x~0 17)) (and (<= main_~x~0 9) (<= 9 main_~x~0) .cse67 .cse68) (and .cse95 (<= 5 main_~x~0) (<= main_~x~0 5) .cse96) (and (<= 31 main_~x~0) (<= main_~x~0 31) .cse41 .cse42) (and (<= main_~x~0 32) .cse6 .cse7 (<= 32 main_~x~0)) (and .cse49 (<= 19 main_~x~0) (<= main_~x~0 19) .cse50) (and .cse77 .cse78 (<= 22 main_~x~0) (<= main_~x~0 22)) (and (<= 76 main_~x~0) .cse79 (<= main_~x~0 76) .cse80) (and (<= 62 main_~x~0) .cse83 (<= main_~x~0 62) .cse84) (and (<= main_~x~0 48) .cse81 .cse82 (<= 48 main_~x~0)) (and (<= 80 main_~x~0) .cse33 (<= main_~x~0 80) .cse34) (and (<= main_~x~0 43) .cse87 (<= 43 main_~x~0) .cse88) (and (<= main_~x~0 95) .cse95 (<= 95 main_~x~0) .cse96) (and .cse39 (<= 94 main_~x~0) .cse40 (<= main_~x~0 94)) (and .cse15 (<= main_~x~0 87) (<= 87 main_~x~0) .cse16) (and (<= 53 main_~x~0) .cse85 (<= main_~x~0 53) .cse86) (and (<= main_~x~0 39) .cse17 .cse18 (<= 39 main_~x~0)) (and (<= main_~x~0 33) .cse45 .cse46 (<= 33 main_~x~0)) (and .cse57 .cse58 (<= main_~x~0 40) (<= 40 main_~x~0)) (and .cse59 .cse60 (<= main_~x~0 55) (<= 55 main_~x~0)) (and .cse75 .cse76 (<= 71 main_~x~0) (<= main_~x~0 71)) (and (<= 14 main_~x~0) (<= main_~x~0 14) .cse65 .cse66) (and (<= main_~x~0 12) .cse37 (<= 12 main_~x~0) .cse38) (and .cse13 .cse14 (<= 15 main_~x~0) (<= main_~x~0 15)) (and (<= main_~x~0 37) .cse23 (<= 37 main_~x~0) .cse24) (and (<= main_~x~0 59) (<= 59 main_~x~0) .cse97 .cse98) (and .cse63 (<= main_~x~0 26) (<= 26 main_~x~0) .cse64) (and (<= main_~x~0 41) .cse97 .cse98 (<= 41 main_~x~0)) (and .cse0 (<= 58 main_~x~0) (<= main_~x~0 58) .cse1))) [2022-03-17 19:42:44,146 INFO L878 garLoopResultBuilder]: At program point L28-3(lines 28 36) the Hoare annotation is: (and (< 99 main_~x~0) (<= main_~x~0 100) (<= 0 (+ main_~y~0 1))) [2022-03-17 19:42:44,146 INFO L882 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2022-03-17 19:42:44,146 INFO L882 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2022-03-17 19:42:44,147 INFO L882 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2022-03-17 19:42:44,147 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 39) no Hoare annotation was computed. [2022-03-17 19:42:44,147 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 39) no Hoare annotation was computed. [2022-03-17 19:42:44,147 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-17 19:42:44,147 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-03-17 19:42:44,147 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-03-17 19:42:44,147 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-03-17 19:42:44,147 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-03-17 19:42:44,147 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-03-17 19:42:44,149 INFO L718 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2022-03-17 19:42:44,150 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 19:42:44,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:42:44 BasicIcfg [2022-03-17 19:42:44,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 19:42:44,185 INFO L158 Benchmark]: Toolchain (without parser) took 36691.00ms. Allocated memory was 207.6MB in the beginning and 593.5MB in the end (delta: 385.9MB). Free memory was 154.6MB in the beginning and 262.5MB in the end (delta: -107.9MB). Peak memory consumption was 336.2MB. Max. memory is 8.0GB. [2022-03-17 19:42:44,185 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 207.6MB. Free memory is still 170.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 19:42:44,185 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.22ms. Allocated memory is still 207.6MB. Free memory was 154.4MB in the beginning and 183.2MB in the end (delta: -28.8MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-03-17 19:42:44,185 INFO L158 Benchmark]: Boogie Preprocessor took 25.73ms. Allocated memory is still 207.6MB. Free memory was 183.2MB in the beginning and 182.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 19:42:44,185 INFO L158 Benchmark]: RCFGBuilder took 265.53ms. Allocated memory is still 207.6MB. Free memory was 182.2MB in the beginning and 171.7MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-17 19:42:44,186 INFO L158 Benchmark]: IcfgTransformer took 11.80ms. Allocated memory is still 207.6MB. Free memory was 171.7MB in the beginning and 170.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:42:44,186 INFO L158 Benchmark]: TraceAbstraction took 36164.05ms. Allocated memory was 207.6MB in the beginning and 593.5MB in the end (delta: 385.9MB). Free memory was 170.1MB in the beginning and 262.5MB in the end (delta: -92.4MB). Peak memory consumption was 352.7MB. Max. memory is 8.0GB. [2022-03-17 19:42:44,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 207.6MB. Free memory is still 170.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 218.22ms. Allocated memory is still 207.6MB. Free memory was 154.4MB in the beginning and 183.2MB in the end (delta: -28.8MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.73ms. Allocated memory is still 207.6MB. Free memory was 183.2MB in the beginning and 182.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 265.53ms. Allocated memory is still 207.6MB. Free memory was 182.2MB in the beginning and 171.7MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 11.80ms. Allocated memory is still 207.6MB. Free memory was 171.7MB in the beginning and 170.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 36164.05ms. Allocated memory was 207.6MB in the beginning and 593.5MB in the end (delta: 385.9MB). Free memory was 170.1MB in the beginning and 262.5MB in the end (delta: -92.4MB). Peak memory consumption was 352.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 36.0s, OverallIterations: 14, TraceHistogramMax: 103, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 14.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 908 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 907 mSDsluCounter, 1161 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 729 mSDsCounter, 954 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17508 IncrementalHoareTripleChecker+Invalid, 18462 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 954 mSolverCounterUnsat, 432 mSDtfsCounter, 17508 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3595 GetRequests, 2735 SyntacticMatches, 15 SemanticMatches, 845 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20138 ImplicationChecksByTransitivity, 15.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4191occurred in iteration=13, InterpolantAutomatonStates: 459, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 545 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 21 PreInvPairs, 123 NumberOfFragments, 1328 HoareAnnotationTreeSize, 21 FomulaSimplifications, 1480 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 5789 FormulaSimplificationTreeSizeReductionInter, 2.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 3065 NumberOfCodeBlocks, 2942 NumberOfCodeBlocksAsserted, 244 NumberOfCheckSat, 4225 ConstructedInterpolants, 0 QuantifiedInterpolants, 12179 SizeOfPredicates, 2 NumberOfNonLiveVariables, 3495 ConjunctsInSsa, 395 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 95861/148149 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 42 && y <= 42) && 42 <= x) && 42 <= y) || (((x <= 54 && y <= 46) && 46 <= y) && 54 <= x)) || (((50 <= y && x <= 50) && 50 <= x) && y <= 50)) || (((y <= 11 && x <= 11) && 11 <= x) && 11 <= y)) || (((x <= 68 && 68 <= x) && y <= 32) && 32 <= y)) || (((x <= 92 && 92 <= x) && y <= 8) && 8 <= y)) || (((y <= 30 && 30 <= x) && x <= 30) && 30 <= y)) || (x == 0 && y == 0)) || (((y <= 15 && 15 <= y) && 85 <= x) && x <= 85)) || (((y <= 13 && x <= 13) && 13 <= x) && 13 <= y)) || (((x <= 61 && 61 <= x) && 39 <= y) && y <= 39)) || (((16 <= y && x <= 16) && y <= 16) && 16 <= x)) || (((y <= 28 && 72 <= x) && x <= 72) && 28 <= y)) || (((x <= 63 && 63 <= x) && y <= 37) && 37 <= y)) || (((7 <= y && y <= 7) && x <= 7) && 7 <= x)) || (((y <= 3 && 3 <= y) && x <= 3) && 3 <= x)) || (((y <= 44 && 44 <= y) && x <= 56) && 56 <= x)) || (((97 <= x && y <= 3) && 3 <= y) && x <= 97)) || (((y <= 10 && 10 <= y) && 90 <= x) && x <= 90)) || (((y <= 30 && x <= 70) && 70 <= x) && 30 <= y)) || (((x <= 20 && 20 <= x) && 20 <= y) && y <= 20)) || (((x <= 99 && 99 <= x) && 1 <= y) && y <= 1)) || (((12 <= y && x <= 88) && y <= 12) && 88 <= x)) || (((6 <= x && y <= 6) && x <= 6) && 6 <= y)) || (((x <= 69 && y <= 31) && 31 <= y) && 69 <= x)) || (((25 <= y && y <= 25) && x <= 25) && 25 <= x)) || (((33 <= y && y <= 33) && 67 <= x) && x <= 67)) || (((y <= 4 && 96 <= x) && 4 <= y) && x <= 96)) || ((99 < x && y == 0) && x <= 100)) || (((19 <= y && x <= 81) && 81 <= x) && y <= 19)) || (((y <= 34 && 66 <= x) && x <= 66) && 34 <= y)) || (((1 <= x && x <= 1) && 1 <= y) && y <= 1)) || (((49 <= y && x <= 51) && 51 <= x) && y <= 49)) || (((x <= 73 && y <= 27) && 73 <= x) && 27 <= y)) || (((y <= 34 && x <= 34) && 34 <= x) && 34 <= y)) || (((40 <= y && x <= 60) && y <= 40) && 60 <= x)) || (((y <= 11 && 89 <= x) && x <= 89) && 11 <= y)) || (((y <= 45 && 45 <= y) && x <= 45) && 45 <= x)) || (((x <= 64 && 36 <= y) && y <= 36) && 64 <= x)) || (((74 <= x && y <= 26) && x <= 74) && 26 <= y)) || (((14 <= y && y <= 14) && x <= 86) && 86 <= x)) || (((x <= 4 && y <= 4) && 4 <= y) && 4 <= x)) || (((46 <= x && y <= 46) && 46 <= y) && x <= 46)) || (((y <= 8 && x <= 8) && 8 <= x) && 8 <= y)) || (((x <= 49 && 49 <= y) && 49 <= x) && y <= 49)) || (((x <= 91 && 9 <= y) && y <= 9) && 91 <= x)) || (((84 <= x && 16 <= y) && x <= 84) && y <= 16)) || (((x <= 83 && y <= 17) && 83 <= x) && 17 <= y)) || (((75 <= x && 25 <= y) && x <= 75) && y <= 25)) || (((28 <= x && y <= 28) && x <= 28) && 28 <= y)) || (((35 <= x && x <= 35) && 35 <= y) && y <= 35)) || (((y <= 23 && 23 <= x) && 23 <= y) && x <= 23)) || (((x <= 29 && 29 <= y) && y <= 29) && 29 <= x)) || (((78 <= x && y <= 22) && 22 <= y) && x <= 78)) || (((x <= 24 && 24 <= y) && 24 <= x) && y <= 24)) || (((y <= 23 && x <= 77) && 23 <= y) && 77 <= x)) || (((x <= 52 && 52 <= x) && 48 <= y) && y <= 48)) || (((x <= 38 && 38 <= y) && y <= 38) && 38 <= x)) || (((y <= 27 && 27 <= x) && 27 <= y) && x <= 27)) || (((47 <= x && y <= 47) && x <= 47) && 47 <= y)) || (((65 <= x && x <= 65) && 35 <= y) && y <= 35)) || (((57 <= x && 43 <= y) && x <= 57) && y <= 43)) || (((18 <= y && 82 <= x) && x <= 82) && y <= 18)) || (((7 <= y && y <= 7) && x <= 93) && 93 <= x)) || (((x <= 36 && 36 <= x) && 36 <= y) && y <= 36)) || (((21 <= x && y <= 21) && x <= 21) && 21 <= y)) || (((y <= 44 && 44 <= y) && 44 <= x) && x <= 44)) || (((2 <= y && y <= 2) && 2 <= x) && x <= 2)) || (((18 <= y && x <= 18) && 18 <= x) && y <= 18)) || (((2 <= y && y <= 2) && 98 <= x) && x <= 98)) || (((x <= 79 && 79 <= x) && y <= 21) && 21 <= y)) || (((y <= 10 && 10 <= y) && x <= 10) && 10 <= x)) || (((y <= 17 && 17 <= y) && 17 <= x) && x <= 17)) || (((x <= 9 && 9 <= x) && 9 <= y) && y <= 9)) || (((5 <= y && 5 <= x) && x <= 5) && y <= 5)) || (((31 <= x && x <= 31) && y <= 31) && 31 <= y)) || (((x <= 32 && y <= 32) && 32 <= y) && 32 <= x)) || (((19 <= y && 19 <= x) && x <= 19) && y <= 19)) || (((y <= 22 && 22 <= y) && 22 <= x) && x <= 22)) || (((76 <= x && 24 <= y) && x <= 76) && y <= 24)) || (((62 <= x && 38 <= y) && x <= 62) && y <= 38)) || (((x <= 48 && 48 <= y) && y <= 48) && 48 <= x)) || (((80 <= x && 20 <= y) && x <= 80) && y <= 20)) || (((x <= 43 && 43 <= y) && 43 <= x) && y <= 43)) || (((x <= 95 && 5 <= y) && 95 <= x) && y <= 5)) || (((y <= 6 && 94 <= x) && 6 <= y) && x <= 94)) || (((y <= 13 && x <= 87) && 87 <= x) && 13 <= y)) || (((53 <= x && y <= 47) && x <= 53) && 47 <= y)) || (((x <= 39 && 39 <= y) && y <= 39) && 39 <= x)) || (((x <= 33 && 33 <= y) && y <= 33) && 33 <= x)) || (((40 <= y && y <= 40) && x <= 40) && 40 <= x)) || (((y <= 45 && 45 <= y) && x <= 55) && 55 <= x)) || (((29 <= y && y <= 29) && 71 <= x) && x <= 71)) || (((14 <= x && x <= 14) && 14 <= y) && y <= 14)) || (((x <= 12 && 12 <= y) && 12 <= x) && y <= 12)) || (((y <= 15 && 15 <= y) && 15 <= x) && x <= 15)) || (((x <= 37 && y <= 37) && 37 <= x) && 37 <= y)) || (((x <= 59 && 59 <= x) && 41 <= y) && y <= 41)) || (((y <= 26 && x <= 26) && 26 <= x) && 26 <= y)) || (((x <= 41 && 41 <= y) && y <= 41) && 41 <= x)) || (((y <= 42 && 58 <= x) && x <= 58) && 42 <= y) RESULT: Ultimate proved your program to be correct! [2022-03-17 19:42:44,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...