/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/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:03:10,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:03:10,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:03:10,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:03:10,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:03:10,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:03:10,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:03:10,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:03:10,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:03:10,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:03:10,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:03:10,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:03:10,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:03:10,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:03:10,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:03:10,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:03:10,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:03:10,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:03:10,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:03:10,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:03:10,852 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:03:10,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:03:10,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:03:10,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:03:10,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:03:10,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:03:10,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:03:10,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:03:10,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:03:10,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:03:10,890 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:03:10,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:03:10,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:03:10,891 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:03:10,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:03:10,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:03:10,892 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:03:10,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:03:10,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:03:10,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:03:10,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:03:10,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:03:10,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:03:10,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:03:10,893 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:03:10,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:03:10,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:03:10,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:03:10,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:03:10,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:03:10,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:03:10,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:03:10,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:03:10,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:03:10,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:03:10,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:03:10,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:03:10,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:03:10,896 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:03:10,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:03:11,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:03:11,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:03:11,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:03:11,115 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:03:11,116 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:03:11,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-03-20 08:03:11,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9f9d3d6/622ccbd71b974e27a387cb0a928f6b77/FLAGe8c5cd208 [2022-03-20 08:03:11,503 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:03:11,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-03-20 08:03:11,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9f9d3d6/622ccbd71b974e27a387cb0a928f6b77/FLAGe8c5cd208 [2022-03-20 08:03:11,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9f9d3d6/622ccbd71b974e27a387cb0a928f6b77 [2022-03-20 08:03:11,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:03:11,518 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:03:11,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:03:11,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:03:11,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:03:11,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bc3490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11, skipping insertion in model container [2022-03-20 08:03:11,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:03:11,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:03:11,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-03-20 08:03:11,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:03:11,686 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:03:11,693 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-03-20 08:03:11,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:03:11,706 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:03:11,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11 WrapperNode [2022-03-20 08:03:11,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:03:11,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:03:11,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:03:11,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:03:11,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:03:11,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:03:11,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:03:11,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:03:11,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (1/1) ... [2022-03-20 08:03:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:03:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:11,763 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) [2022-03-20 08:03:11,773 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 [2022-03-20 08:03:11,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:03:11,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:03:11,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:03:11,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:03:11,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:03:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:03:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:03:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:03:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:03:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:03:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 08:03:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:03:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:03:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 08:03:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:03:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:03:11,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:03:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:03:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:03:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:03:11,871 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:03:11,873 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:03:12,036 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:03:12,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:03:12,041 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-20 08:03:12,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:12 BoogieIcfgContainer [2022-03-20 08:03:12,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:03:12,048 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:03:12,048 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:03:12,049 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:03:12,051 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:12" (1/1) ... [2022-03-20 08:03:12,053 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:03:12,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:03:12 BasicIcfg [2022-03-20 08:03:12,075 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:03:12,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:03:12,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:03:12,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:03:12,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:03:11" (1/4) ... [2022-03-20 08:03:12,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3326792c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:03:12, skipping insertion in model container [2022-03-20 08:03:12,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:11" (2/4) ... [2022-03-20 08:03:12,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3326792c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:03:12, skipping insertion in model container [2022-03-20 08:03:12,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:12" (3/4) ... [2022-03-20 08:03:12,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3326792c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:03:12, skipping insertion in model container [2022-03-20 08:03:12,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:03:12" (4/4) ... [2022-03-20 08:03:12,083 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.cqvasr [2022-03-20 08:03:12,088 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:03:12,088 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:03:12,132 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:03:12,138 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 [2022-03-20 08:03:12,138 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:03:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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) [2022-03-20 08:03:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:03:12,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:12,162 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:12,162 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1926103570, now seen corresponding path program 1 times [2022-03-20 08:03:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:12,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192188754] [2022-03-20 08:03:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:12,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:12,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:12,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192188754] [2022-03-20 08:03:12,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192188754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:12,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:03:12,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:03:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443734552] [2022-03-20 08:03:12,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:12,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:03:12,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:03:12,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:03:12,365 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-20 08:03:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:12,392 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2022-03-20 08:03:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:03:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-03-20 08:03:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:12,401 INFO L225 Difference]: With dead ends: 58 [2022-03-20 08:03:12,401 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 08:03:12,403 INFO L912 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 [2022-03-20 08:03:12,405 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 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 [2022-03-20 08:03:12,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 08:03:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-20 08:03:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:03:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-03-20 08:03:12,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2022-03-20 08:03:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:12,427 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-03-20 08:03:12,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-20 08:03:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-03-20 08:03:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:03:12,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:12,428 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:12,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:03:12,428 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:12,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1448912944, now seen corresponding path program 1 times [2022-03-20 08:03:12,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:12,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910739187] [2022-03-20 08:03:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:12,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:12,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:12,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910739187] [2022-03-20 08:03:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910739187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:12,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:03:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:03:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249063341] [2022-03-20 08:03:12,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:12,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:03:12,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:12,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:03:12,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:03:12,556 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-03-20 08:03:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:12,710 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-03-20 08:03:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:03:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-03-20 08:03:12,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:12,711 INFO L225 Difference]: With dead ends: 53 [2022-03-20 08:03:12,711 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:03:12,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:03:12,717 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:12,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:03:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:03:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-20 08:03:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:03:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-03-20 08:03:12,733 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-03-20 08:03:12,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:12,733 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-03-20 08:03:12,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-03-20 08:03:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-03-20 08:03:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:03:12,735 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:12,735 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:12,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:03:12,736 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1246349198, now seen corresponding path program 1 times [2022-03-20 08:03:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:12,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646766713] [2022-03-20 08:03:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:12,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:12,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:12,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646766713] [2022-03-20 08:03:12,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646766713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:12,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343006929] [2022-03-20 08:03:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:12,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:12,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:12,891 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) [2022-03-20 08:03:12,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:03:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 08:03:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:03:13,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:03:13,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343006929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:13,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:03:13,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 08:03:13,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643582666] [2022-03-20 08:03:13,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:13,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 08:03:13,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 08:03:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:03:13,065 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-20 08:03:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:13,106 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-03-20 08:03:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 08:03:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2022-03-20 08:03:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:13,107 INFO L225 Difference]: With dead ends: 49 [2022-03-20 08:03:13,107 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 08:03:13,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:03:13,109 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:13,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 105 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 08:03:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-03-20 08:03:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:03:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-03-20 08:03:13,119 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2022-03-20 08:03:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:13,120 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-03-20 08:03:13,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-20 08:03:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-03-20 08:03:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 08:03:13,122 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:13,123 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:13,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 08:03:13,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:13,340 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash 931318849, now seen corresponding path program 1 times [2022-03-20 08:03:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:13,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501873558] [2022-03-20 08:03:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:13,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501873558] [2022-03-20 08:03:13,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501873558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683994029] [2022-03-20 08:03:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:13,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:13,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:13,470 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) [2022-03-20 08:03:13,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:03:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:13,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:03:13,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:13,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:13,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683994029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:13,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:13,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-03-20 08:03:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659467343] [2022-03-20 08:03:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:13,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 08:03:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 08:03:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 08:03:13,729 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-03-20 08:03:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:13,898 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-03-20 08:03:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:03:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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 23 [2022-03-20 08:03:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:13,899 INFO L225 Difference]: With dead ends: 61 [2022-03-20 08:03:13,899 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 08:03:13,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-20 08:03:13,899 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:13,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 63 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:03:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 08:03:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-03-20 08:03:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:03:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-20 08:03:13,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 23 [2022-03-20 08:03:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:13,903 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-20 08:03:13,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-03-20 08:03:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-20 08:03:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 08:03:13,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:13,904 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:13,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:14,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:03:14,120 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1459507809, now seen corresponding path program 2 times [2022-03-20 08:03:14,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:14,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33789746] [2022-03-20 08:03:14,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:14,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:14,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:14,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33789746] [2022-03-20 08:03:14,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33789746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43634326] [2022-03-20 08:03:14,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:03:14,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:14,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:14,460 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) [2022-03-20 08:03:14,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:03:14,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:03:14,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:03:14,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 08:03:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:14,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:03:14,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:03:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:03:14,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 08:03:14,751 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:03:14,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:03:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:14,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:15,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43634326] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:15,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 08:03:15,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16, 15] total 31 [2022-03-20 08:03:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119069413] [2022-03-20 08:03:15,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:15,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 08:03:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 08:03:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-03-20 08:03:15,042 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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) [2022-03-20 08:03:15,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:15,120 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-03-20 08:03:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 08:03:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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 25 [2022-03-20 08:03:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:15,121 INFO L225 Difference]: With dead ends: 49 [2022-03-20 08:03:15,121 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 08:03:15,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 08:03:15,122 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:15,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 175 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-03-20 08:03:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 08:03:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-03-20 08:03:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-03-20 08:03:15,127 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2022-03-20 08:03:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:15,127 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-03-20 08:03:15,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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) [2022-03-20 08:03:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-03-20 08:03:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 08:03:15,128 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:15,128 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:15,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:15,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:15,345 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1038508128, now seen corresponding path program 1 times [2022-03-20 08:03:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:15,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703012553] [2022-03-20 08:03:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:15,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:15,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:15,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:15,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703012553] [2022-03-20 08:03:15,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703012553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:15,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:03:15,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:03:15,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871634306] [2022-03-20 08:03:15,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:15,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:03:15,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:03:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:03:15,395 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-03-20 08:03:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:15,459 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2022-03-20 08:03:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:03:15,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 25 [2022-03-20 08:03:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:15,461 INFO L225 Difference]: With dead ends: 78 [2022-03-20 08:03:15,461 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 08:03:15,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:03:15,462 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:15,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 36 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 08:03:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-03-20 08:03:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-03-20 08:03:15,467 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 25 [2022-03-20 08:03:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:15,467 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-03-20 08:03:15,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-03-20 08:03:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-03-20 08:03:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 08:03:15,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:15,467 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:15,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 08:03:15,468 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1031689277, now seen corresponding path program 1 times [2022-03-20 08:03:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411371231] [2022-03-20 08:03:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:15,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:15,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:15,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411371231] [2022-03-20 08:03:15,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411371231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054198100] [2022-03-20 08:03:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:15,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:15,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:15,556 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) [2022-03-20 08:03:15,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:03:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 08:03:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:15,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:15,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054198100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:15,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:15,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-03-20 08:03:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815634324] [2022-03-20 08:03:15,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:15,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 08:03:15,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:15,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 08:03:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:03:15,688 INFO L87 Difference]: Start difference. First operand 47 states and 55 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) [2022-03-20 08:03:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:15,851 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2022-03-20 08:03:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:03:15,851 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 30 [2022-03-20 08:03:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:15,852 INFO L225 Difference]: With dead ends: 91 [2022-03-20 08:03:15,852 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 08:03:15,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-20 08:03:15,853 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:15,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 57 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:03:15,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 08:03:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2022-03-20 08:03:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 46 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-03-20 08:03:15,861 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 30 [2022-03-20 08:03:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:15,861 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-03-20 08:03:15,861 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) [2022-03-20 08:03:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-03-20 08:03:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 08:03:15,862 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:15,862 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:15,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:16,075 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 [2022-03-20 08:03:16,075 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:16,076 INFO L85 PathProgramCache]: Analyzing trace with hash -765262082, now seen corresponding path program 1 times [2022-03-20 08:03:16,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914187687] [2022-03-20 08:03:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:16,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:16,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:16,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914187687] [2022-03-20 08:03:16,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914187687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254410858] [2022-03-20 08:03:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:16,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:16,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:16,388 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) [2022-03-20 08:03:16,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:03:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 08:03:16,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:16,579 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-20 08:03:16,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 08:03:16,767 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-03-20 08:03:16,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-03-20 08:03:16,929 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-03-20 08:03:16,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-03-20 08:03:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:16,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:17,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2022-03-20 08:03:17,403 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-20 08:03:17,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 771 treesize of output 711 [2022-03-20 08:03:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:18,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254410858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:18,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:18,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 14] total 42 [2022-03-20 08:03:18,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504057786] [2022-03-20 08:03:18,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:18,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 08:03:18,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 08:03:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1533, Unknown=2, NotChecked=0, Total=1722 [2022-03-20 08:03:18,928 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:27,716 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2022-03-20 08:03:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 08:03:27,717 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 08:03:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:27,717 INFO L225 Difference]: With dead ends: 105 [2022-03-20 08:03:27,717 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 08:03:27,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=500, Invalid=4189, Unknown=3, NotChecked=0, Total=4692 [2022-03-20 08:03:27,719 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 107 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:27,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 163 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 644 Invalid, 0 Unknown, 370 Unchecked, 0.3s Time] [2022-03-20 08:03:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 08:03:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 60. [2022-03-20 08:03:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 53 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-03-20 08:03:27,729 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 30 [2022-03-20 08:03:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:27,730 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-03-20 08:03:27,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-03-20 08:03:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 08:03:27,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:27,730 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:27,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:27,948 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 [2022-03-20 08:03:27,948 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1650775123, now seen corresponding path program 1 times [2022-03-20 08:03:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:27,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880911771] [2022-03-20 08:03:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:27,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:27,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:27,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:27,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880911771] [2022-03-20 08:03:27,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880911771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:27,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141235720] [2022-03-20 08:03:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:27,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:27,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:28,000 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) [2022-03-20 08:03:28,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:03:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:28,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 08:03:28,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:28,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:03:28,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141235720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:28,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:28,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-03-20 08:03:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929373498] [2022-03-20 08:03:28,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:28,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 08:03:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 08:03:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:03:28,108 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 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) [2022-03-20 08:03:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:28,290 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2022-03-20 08:03:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 08:03:28,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 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 [2022-03-20 08:03:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:28,292 INFO L225 Difference]: With dead ends: 132 [2022-03-20 08:03:28,292 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 08:03:28,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-03-20 08:03:28,292 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 148 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:28,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 45 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:03:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 08:03:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2022-03-20 08:03:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-03-20 08:03:28,299 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 31 [2022-03-20 08:03:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:28,299 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-03-20 08:03:28,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 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) [2022-03-20 08:03:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-03-20 08:03:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 08:03:28,300 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:28,300 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:28,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:28,500 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 [2022-03-20 08:03:28,501 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash -547485170, now seen corresponding path program 1 times [2022-03-20 08:03:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:28,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727517327] [2022-03-20 08:03:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:28,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:28,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 08:03:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:03:28,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:28,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727517327] [2022-03-20 08:03:28,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727517327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:28,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635078684] [2022-03-20 08:03:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:28,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:28,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:28,591 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) [2022-03-20 08:03:28,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:03:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 08:03:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:03:28,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:03:28,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635078684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:28,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:28,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-20 08:03:28,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326890360] [2022-03-20 08:03:28,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:28,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 08:03:28,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 08:03:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:03:28,884 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:29,162 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2022-03-20 08:03:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 08:03:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-20 08:03:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:29,163 INFO L225 Difference]: With dead ends: 160 [2022-03-20 08:03:29,164 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 08:03:29,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-03-20 08:03:29,165 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 126 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:29,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 69 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:03:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 08:03:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2022-03-20 08:03:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2022-03-20 08:03:29,178 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 33 [2022-03-20 08:03:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:29,178 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2022-03-20 08:03:29,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2022-03-20 08:03:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 08:03:29,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:29,179 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:29,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:29,379 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 [2022-03-20 08:03:29,379 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1553999756, now seen corresponding path program 2 times [2022-03-20 08:03:29,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:29,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156701033] [2022-03-20 08:03:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:29,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:29,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:03:29,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:29,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156701033] [2022-03-20 08:03:29,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156701033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:29,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441982320] [2022-03-20 08:03:29,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:03:29,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:29,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:29,599 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) [2022-03-20 08:03:29,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:03:29,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:03:29,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:03:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 08:03:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:29,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:03:29,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 08:03:29,872 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:03:29,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:03:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:03:29,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:30,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-20 08:03:30,031 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-20 08:03:30,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-03-20 08:03:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:03:30,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441982320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:30,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:30,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-03-20 08:03:30,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680640596] [2022-03-20 08:03:30,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:30,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 08:03:30,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 08:03:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-20 08:03:30,156 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 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) [2022-03-20 08:03:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:31,587 INFO L93 Difference]: Finished difference Result 211 states and 257 transitions. [2022-03-20 08:03:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 08:03:31,588 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 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 38 [2022-03-20 08:03:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:31,589 INFO L225 Difference]: With dead ends: 211 [2022-03-20 08:03:31,589 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 08:03:31,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1045, Invalid=5117, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 08:03:31,590 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:31,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 85 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 915 Invalid, 0 Unknown, 101 Unchecked, 0.5s Time] [2022-03-20 08:03:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 08:03:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 84. [2022-03-20 08:03:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-03-20 08:03:31,599 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 38 [2022-03-20 08:03:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:31,599 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-03-20 08:03:31,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 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) [2022-03-20 08:03:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-03-20 08:03:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 08:03:31,600 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:31,600 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:31,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:31,817 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 [2022-03-20 08:03:31,817 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1626243309, now seen corresponding path program 2 times [2022-03-20 08:03:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:31,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619173178] [2022-03-20 08:03:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:32,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619173178] [2022-03-20 08:03:32,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619173178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695073061] [2022-03-20 08:03:32,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:03:32,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:32,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:32,322 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) [2022-03-20 08:03:32,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:03:32,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:03:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:03:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 08:03:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:32,537 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-20 08:03:32,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 08:03:32,786 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-03-20 08:03:32,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-03-20 08:03:33,039 INFO L356 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2022-03-20 08:03:33,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-03-20 08:03:33,199 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-03-20 08:03:33,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-03-20 08:03:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:03:33,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:49,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-03-20 08:03:49,653 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-03-20 08:03:49,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5803 treesize of output 5609 [2022-03-20 08:04:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 11 refuted. 1 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:04:27,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695073061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:27,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:27,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 18] total 53 [2022-03-20 08:04:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611562818] [2022-03-20 08:04:27,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:27,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 08:04:27,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:27,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 08:04:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2451, Unknown=13, NotChecked=0, Total=2756 [2022-03-20 08:04:27,723 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:45,129 WARN L232 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:04:58,418 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 4))) (let ((.cse3 (+ .cse1 |c_main_~#v~0.offset| 4)) (.cse4 (+ |c_main_~#v~0.offset| 4))) (and (or (<= 1 c_main_~i~0) (let ((.cse0 (* c_main_~j~0 4))) (and (not (= .cse0 0)) (not (= (+ .cse0 4) 0)) (= .cse1 0))) (not |c_main_#t~short10|)) (= |c_#NULL.base| |c_old(#NULL.base)|) (forall ((v_main_~i~0_29 Int)) (or (<= 0 v_main_~i~0_29) (forall ((v_ArrVal_198 Int) (v_ArrVal_195 Int)) (or (let ((.cse2 (store (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_29 4) 4) v_ArrVal_195) (+ |c_main_~#v~0.offset| (* c_main_~j~0 4) 4) v_ArrVal_198))) (<= (select .cse2 |c_main_~#v~0.offset|) (select .cse2 (+ |c_main_~#v~0.offset| 4)))) (not (<= v_ArrVal_195 c_main_~key~0)))) (not (<= c_main_~i~0 (+ v_main_~i~0_29 1))))) (not (= .cse3 0)) (not (= .cse3 .cse4)) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (let ((.cse5 (select |c_#memory_int| |c_main_~#v~0.base|))) (<= (+ (select .cse5 0) 1) (select .cse5 .cse4)))))) is different from false [2022-03-20 08:05:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:10,165 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-03-20 08:05:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 08:05:10,165 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 08:05:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:10,166 INFO L225 Difference]: With dead ends: 115 [2022-03-20 08:05:10,166 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 08:05:10,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 73.1s TimeCoverageRelationStatistics Valid=801, Invalid=6655, Unknown=30, NotChecked=170, Total=7656 [2022-03-20 08:05:10,168 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:10,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 154 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 643 Invalid, 0 Unknown, 577 Unchecked, 0.5s Time] [2022-03-20 08:05:10,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 08:05:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2022-03-20 08:05:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:05:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-03-20 08:05:10,176 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 38 [2022-03-20 08:05:10,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:10,176 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-03-20 08:05:10,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-03-20 08:05:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 08:05:10,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:10,177 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:10,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:10,380 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 [2022-03-20 08:05:10,381 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:10,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1062518689, now seen corresponding path program 2 times [2022-03-20 08:05:10,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:10,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568749606] [2022-03-20 08:05:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:10,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:10,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 08:05:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:05:10,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568749606] [2022-03-20 08:05:10,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568749606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179825154] [2022-03-20 08:05:10,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:05:10,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:10,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:10,607 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) [2022-03-20 08:05:10,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 08:05:10,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:05:10,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 08:05:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:10,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-20 08:05:10,831 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-20 08:05:10,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-20 08:05:12,869 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_1|))))) is different from true [2022-03-20 08:05:12,930 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 08:05:12,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-03-20 08:05:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-03-20 08:05:12,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:13,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2022-03-20 08:05:13,339 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-03-20 08:05:13,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 903 treesize of output 848 [2022-03-20 08:05:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:05:13,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179825154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:13,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:13,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 31 [2022-03-20 08:05:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031628502] [2022-03-20 08:05:13,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:13,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 08:05:13,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 08:05:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=774, Unknown=1, NotChecked=56, Total=930 [2022-03-20 08:05:13,764 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 08:05:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:46,648 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2022-03-20 08:05:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 08:05:46,649 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-03-20 08:05:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:46,650 INFO L225 Difference]: With dead ends: 129 [2022-03-20 08:05:46,650 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 08:05:46,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=294, Invalid=2346, Unknown=16, NotChecked=100, Total=2756 [2022-03-20 08:05:46,651 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 138 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:46,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 108 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 590 Invalid, 0 Unknown, 339 Unchecked, 0.4s Time] [2022-03-20 08:05:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 08:05:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2022-03-20 08:05:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 86 states have (on average 1.186046511627907) internal successors, (102), 87 states have internal predecessors, (102), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:05:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2022-03-20 08:05:46,660 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 41 [2022-03-20 08:05:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:46,660 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2022-03-20 08:05:46,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 08:05:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2022-03-20 08:05:46,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 08:05:46,660 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:46,660 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:46,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:46,871 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 [2022-03-20 08:05:46,871 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:46,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1915025960, now seen corresponding path program 1 times [2022-03-20 08:05:46,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:46,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136606069] [2022-03-20 08:05:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:46,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:47,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:05:47,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:47,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136606069] [2022-03-20 08:05:47,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136606069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:47,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73393300] [2022-03-20 08:05:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:47,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:47,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:47,020 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) [2022-03-20 08:05:47,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 08:05:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:47,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 08:05:47,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:05:47,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:05:47,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73393300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:47,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:47,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2022-03-20 08:05:47,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277862999] [2022-03-20 08:05:47,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:47,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 08:05:47,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 08:05:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-20 08:05:47,484 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 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) [2022-03-20 08:05:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:47,990 INFO L93 Difference]: Finished difference Result 231 states and 276 transitions. [2022-03-20 08:05:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:05:47,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 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 44 [2022-03-20 08:05:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:47,995 INFO L225 Difference]: With dead ends: 231 [2022-03-20 08:05:47,995 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 08:05:47,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-03-20 08:05:47,996 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 260 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:47,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 93 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 08:05:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 08:05:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2022-03-20 08:05:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 127 states have internal predecessors, (148), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:05:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2022-03-20 08:05:48,010 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 44 [2022-03-20 08:05:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:48,010 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2022-03-20 08:05:48,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 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) [2022-03-20 08:05:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2022-03-20 08:05:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 08:05:48,011 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:48,011 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:48,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:48,217 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 [2022-03-20 08:05:48,217 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:48,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:48,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1328658693, now seen corresponding path program 1 times [2022-03-20 08:05:48,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:48,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735215267] [2022-03-20 08:05:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:48,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:48,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:48,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 08:05:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:05:48,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:48,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735215267] [2022-03-20 08:05:48,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735215267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:48,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230773999] [2022-03-20 08:05:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:48,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:48,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:48,547 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:48,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 08:05:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:48,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 08:05:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:48,746 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-20 08:05:48,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 08:05:48,979 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-03-20 08:05:48,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-03-20 08:06:01,166 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 08:06:01,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2022-03-20 08:06:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:06:01,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:18,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-03-20 08:06:18,450 INFO L356 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2022-03-20 08:06:18,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1679 treesize of output 1549 [2022-03-20 08:06:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:06:18,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230773999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:18,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:18,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 17] total 42 [2022-03-20 08:06:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569880515] [2022-03-20 08:06:18,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:18,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 08:06:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 08:06:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1508, Unknown=15, NotChecked=0, Total=1722 [2022-03-20 08:06:18,951 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 08:06:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:06:32,609 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2022-03-20 08:06:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 08:06:32,610 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-03-20 08:06:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:06:32,611 INFO L225 Difference]: With dead ends: 221 [2022-03-20 08:06:32,611 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 08:06:32,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=609, Invalid=4772, Unknown=21, NotChecked=0, Total=5402 [2022-03-20 08:06:32,612 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 177 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:06:32,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 201 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1235 Invalid, 0 Unknown, 570 Unchecked, 0.7s Time] [2022-03-20 08:06:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 08:06:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 146. [2022-03-20 08:06:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 137 states have internal predecessors, (161), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:06:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 170 transitions. [2022-03-20 08:06:32,627 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 170 transitions. Word has length 46 [2022-03-20 08:06:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:06:32,627 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 170 transitions. [2022-03-20 08:06:32,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 08:06:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 170 transitions. [2022-03-20 08:06:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 08:06:32,627 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:06:32,628 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:06:32,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 08:06:32,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 08:06:32,839 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:06:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:06:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1678714754, now seen corresponding path program 1 times [2022-03-20 08:06:32,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:06:32,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8903895] [2022-03-20 08:06:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:06:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:06:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:33,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:06:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:33,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 08:06:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:06:33,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:06:33,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8903895] [2022-03-20 08:06:33,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8903895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:06:33,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155404799] [2022-03-20 08:06:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:06:33,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:33,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:06:33,044 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:06:33,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 08:06:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:33,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 08:06:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:06:33,243 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-20 08:06:33,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-20 08:06:35,278 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_5| Int) (|v_main_~#v~0.offset_BEFORE_CALL_5| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_5|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_5| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_5|))))) is different from true [2022-03-20 08:06:35,334 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 08:06:35,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-03-20 08:06:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 2 not checked. [2022-03-20 08:06:35,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:38,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-20 08:06:38,415 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-03-20 08:06:38,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 98 [2022-03-20 08:06:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 08:06:38,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155404799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:38,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:38,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 27 [2022-03-20 08:06:38,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312996444] [2022-03-20 08:06:38,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:38,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 08:06:38,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 08:06:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=577, Unknown=2, NotChecked=48, Total=702 [2022-03-20 08:06:38,542 INFO L87 Difference]: Start difference. First operand 146 states and 170 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 08:07:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:07:05,404 INFO L93 Difference]: Finished difference Result 223 states and 258 transitions. [2022-03-20 08:07:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 08:07:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-03-20 08:07:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:07:05,406 INFO L225 Difference]: With dead ends: 223 [2022-03-20 08:07:05,406 INFO L226 Difference]: Without dead ends: 221 [2022-03-20 08:07:05,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=249, Invalid=1903, Unknown=14, NotChecked=90, Total=2256 [2022-03-20 08:07:05,409 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:07:05,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 116 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 754 Invalid, 0 Unknown, 181 Unchecked, 0.4s Time] [2022-03-20 08:07:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-20 08:07:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 140. [2022-03-20 08:07:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 130 states have (on average 1.1846153846153846) internal successors, (154), 131 states have internal predecessors, (154), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:07:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2022-03-20 08:07:05,426 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 46 [2022-03-20 08:07:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:07:05,426 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2022-03-20 08:07:05,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 08:07:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2022-03-20 08:07:05,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 08:07:05,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:07:05,427 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:07:05,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 08:07:05,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 08:07:05,633 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:07:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:07:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2059580614, now seen corresponding path program 2 times [2022-03-20 08:07:05,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:07:05,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117286343] [2022-03-20 08:07:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:07:05,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:07:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:07:06,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:07:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:07:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:07:06,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:07:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117286343] [2022-03-20 08:07:06,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117286343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:07:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863497909] [2022-03-20 08:07:06,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:07:06,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:07:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:07:06,164 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:07:06,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 08:07:06,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:07:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:07:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 08:07:06,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:07:06,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:07:06,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 08:07:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:07:06,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:07:06,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:07:06,475 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:07:06,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-03-20 08:07:06,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:07:06,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:07:06,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:07:06,657 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:07:06,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-03-20 08:07:06,695 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:07:06,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:07:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 08:07:06,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:07:18,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2022-03-20 08:07:18,155 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-20 08:07:18,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 353 treesize of output 338 [2022-03-20 08:07:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 08:07:18,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863497909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:07:18,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:07:18,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-03-20 08:07:18,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447219900] [2022-03-20 08:07:18,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:07:18,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 08:07:18,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:07:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 08:07:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1557, Unknown=7, NotChecked=0, Total=1892 [2022-03-20 08:07:18,348 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 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) [2022-03-20 08:07:51,735 WARN L232 SmtUtils]: Spent 21.87s on a formula simplification. DAG size of input: 59 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:09:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:09:24,130 INFO L93 Difference]: Finished difference Result 428 states and 526 transitions. [2022-03-20 08:09:24,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 08:09:24,130 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 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 46 [2022-03-20 08:09:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:09:24,132 INFO L225 Difference]: With dead ends: 428 [2022-03-20 08:09:24,132 INFO L226 Difference]: Without dead ends: 370 [2022-03-20 08:09:24,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 92 SyntacticMatches, 12 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 136.6s TimeCoverageRelationStatistics Valid=1927, Invalid=10013, Unknown=50, NotChecked=0, Total=11990 [2022-03-20 08:09:24,135 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 311 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 966 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:09:24,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 131 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1029 Invalid, 0 Unknown, 966 Unchecked, 0.7s Time] [2022-03-20 08:09:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-03-20 08:09:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 185. [2022-03-20 08:09:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 175 states have (on average 1.2285714285714286) internal successors, (215), 176 states have internal predecessors, (215), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:09:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2022-03-20 08:09:24,156 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 46 [2022-03-20 08:09:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:09:24,156 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2022-03-20 08:09:24,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 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) [2022-03-20 08:09:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2022-03-20 08:09:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 08:09:24,157 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:09:24,157 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:09:24,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 08:09:24,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:09:24,357 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:09:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:09:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1792607455, now seen corresponding path program 3 times [2022-03-20 08:09:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:09:24,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162869868] [2022-03-20 08:09:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:09:24,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:09:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:09:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:09:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:09:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:09:24,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:09:24,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162869868] [2022-03-20 08:09:24,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162869868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:09:24,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665937215] [2022-03-20 08:09:24,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:09:24,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:09:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:09:24,765 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:09:24,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 08:09:24,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 08:09:24,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:09:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 08:09:24,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:09:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:09:25,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 08:09:25,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:09:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:09:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:09:25,272 INFO L356 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2022-03-20 08:09:25,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 52 [2022-03-20 08:09:25,340 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:09:25,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:09:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-20 08:09:25,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:09:56,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 68 [2022-03-20 08:09:56,106 INFO L356 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2022-03-20 08:09:56,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 412 treesize of output 418 [2022-03-20 08:09:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-20 08:09:56,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665937215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:09:56,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:09:56,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 42 [2022-03-20 08:09:56,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398377084] [2022-03-20 08:09:56,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:09:56,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 08:09:56,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:09:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 08:09:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1484, Unknown=15, NotChecked=0, Total=1722 [2022-03-20 08:09:56,300 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 08:09:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:09:58,808 INFO L93 Difference]: Finished difference Result 295 states and 356 transitions. [2022-03-20 08:09:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 08:09:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-03-20 08:09:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:09:58,810 INFO L225 Difference]: With dead ends: 295 [2022-03-20 08:09:58,810 INFO L226 Difference]: Without dead ends: 293 [2022-03-20 08:09:58,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=1229, Invalid=6238, Unknown=15, NotChecked=0, Total=7482 [2022-03-20 08:09:58,812 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 224 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 08:09:58,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 73 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1294 Invalid, 0 Unknown, 269 Unchecked, 0.8s Time] [2022-03-20 08:09:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-20 08:09:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 158. [2022-03-20 08:09:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 148 states have (on average 1.2094594594594594) internal successors, (179), 149 states have internal predecessors, (179), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:09:58,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2022-03-20 08:09:58,830 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 46 [2022-03-20 08:09:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:09:58,831 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2022-03-20 08:09:58,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 08:09:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2022-03-20 08:09:58,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 08:09:58,831 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:09:58,831 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:09:58,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 08:09:59,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 08:09:59,035 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:09:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:09:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1570483864, now seen corresponding path program 3 times [2022-03-20 08:09:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:09:59,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370432709] [2022-03-20 08:09:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:09:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:09:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:09:59,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:09:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:09:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:09:59,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:09:59,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370432709] [2022-03-20 08:09:59,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370432709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:09:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356502688] [2022-03-20 08:09:59,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:09:59,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:09:59,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:09:59,606 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:09:59,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 08:09:59,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-20 08:09:59,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:09:59,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 08:09:59,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:09:59,841 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-20 08:09:59,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 08:10:00,037 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-03-20 08:10:00,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2022-03-20 08:10:00,205 INFO L356 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2022-03-20 08:10:00,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-20 08:10:00,358 INFO L356 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2022-03-20 08:10:00,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-03-20 08:10:00,466 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-03-20 08:10:00,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-03-20 08:10:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 08:10:00,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:10:03,046 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_57 Int)) (or (not (<= c_main_~j~0 (+ v_main_~i~0_57 1))) (forall ((v_ArrVal_437 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* v_main_~i~0_57 4) |c_main_~#v~0.offset| 4) v_ArrVal_437))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))))) is different from false [2022-03-20 08:11:08,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2022-03-20 08:11:08,264 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-03-20 08:11:08,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169635 treesize of output 166561 [2022-03-20 08:11:14,822 WARN L232 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 654 DAG size of output: 648 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)