/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:06:56,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:06:56,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:06:56,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:06:56,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:06:56,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:06:56,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:06:56,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:06:56,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:06:56,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:06:56,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:06:56,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:06:56,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:06:56,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:06:56,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:06:56,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:06:56,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:06:56,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:06:56,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:06:56,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:06:56,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:06:56,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:06:56,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:06:56,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:06:56,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 08:06:56,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 08:06:56,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 08:06:56,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 08:06:56,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 08:06:56,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 08:06:56,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:06:56,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:06:56,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:06:56,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:06:56,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:06:56,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:06:56,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:06:56,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:06:56,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:06:56,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:06:56,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:06:56,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:06:56,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:06:56,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:06:56,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:06:56,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:06:56,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:06:56,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:06:56,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:06:56,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:06:56,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:06:56,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:06:56,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:06:56,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:06:56,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:06:56,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:06:56,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:06:56,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:06:56,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:06:56,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:06:56,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:06:56,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:06:56,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:06:56,935 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:06:56,935 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:06:57,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:06:57,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:06:57,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:06:57,143 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:06:57,143 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:06:57,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2022-01-31 08:06:57,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581e4967e/fc58500da7fd4c06968e42bbdaa4a591/FLAG8fe444fee [2022-01-31 08:06:57,571 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:06:57,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i [2022-01-31 08:06:57,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581e4967e/fc58500da7fd4c06968e42bbdaa4a591/FLAG8fe444fee [2022-01-31 08:06:57,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581e4967e/fc58500da7fd4c06968e42bbdaa4a591 [2022-01-31 08:06:57,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:06:57,590 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:06:57,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:06:57,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:06:57,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:06:57,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198a3d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57, skipping insertion in model container [2022-01-31 08:06:57,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:06:57,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:06:57,753 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i[811,824] [2022-01-31 08:06:57,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:06:57,772 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:06:57,780 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i[811,824] [2022-01-31 08:06:57,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:06:57,799 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:06:57,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57 WrapperNode [2022-01-31 08:06:57,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:06:57,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:06:57,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:06:57,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:06:57,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:06:57,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:06:57,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:06:57,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:06:57,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (1/1) ... [2022-01-31 08:06:57,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:06:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:57,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:06:57,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:06:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:06:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:06:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:06:57,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:06:57,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:06:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:06:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:06:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:06:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:06:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:06:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:06:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:06:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:06:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:06:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:06:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:06:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:06:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:06:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:06:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:06:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:06:57,957 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:06:57,958 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:06:58,119 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:06:58,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:06:58,129 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:06:58,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:58 BoogieIcfgContainer [2022-01-31 08:06:58,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:06:58,131 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:06:58,132 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:06:58,134 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:06:58,137 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:58" (1/1) ... [2022-01-31 08:06:58,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:06:58 BasicIcfg [2022-01-31 08:06:58,148 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:06:58,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:06:58,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:06:58,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:06:58,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:06:57" (1/4) ... [2022-01-31 08:06:58,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7d1518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:06:58, skipping insertion in model container [2022-01-31 08:06:58,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:57" (2/4) ... [2022-01-31 08:06:58,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7d1518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:06:58, skipping insertion in model container [2022-01-31 08:06:58,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:58" (3/4) ... [2022-01-31 08:06:58,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7d1518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:06:58, skipping insertion in model container [2022-01-31 08:06:58,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:06:58" (4/4) ... [2022-01-31 08:06:58,153 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-1.iJordan [2022-01-31 08:06:58,156 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:06:58,157 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:06:58,209 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:06:58,215 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:06:58,215 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:06:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 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) [2022-01-31 08:06:58,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:06:58,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:58,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:58,234 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1867323789, now seen corresponding path program 1 times [2022-01-31 08:06:58,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:58,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104025607] [2022-01-31 08:06:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:58,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:58,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:06:58,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:58,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104025607] [2022-01-31 08:06:58,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104025607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:58,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:06:58,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:06:58,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431735322] [2022-01-31 08:06:58,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:58,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:06:58,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:58,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:06:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:06:58,416 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 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) [2022-01-31 08:06:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:58,454 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-01-31 08:06:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:06:58,457 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 [2022-01-31 08:06:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:58,462 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:06:58,462 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 08:06:58,464 INFO L932 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 [2022-01-31 08:06:58,467 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 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 [2022-01-31 08:06:58,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:06:58,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 08:06:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 08:06:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-31 08:06:58,489 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2022-01-31 08:06:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:58,490 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-31 08:06:58,490 INFO L471 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) [2022-01-31 08:06:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-31 08:06:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:06:58,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:58,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:06:58,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash -978896587, now seen corresponding path program 1 times [2022-01-31 08:06:58,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:58,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771235932] [2022-01-31 08:06:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:58,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:58,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:06:58,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:58,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771235932] [2022-01-31 08:06:58,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771235932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:58,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:06:58,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:06:58,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233194310] [2022-01-31 08:06:58,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:58,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:06:58,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:06:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:06:58,574 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-01-31 08:06:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:58,657 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-31 08:06:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:06:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2022-01-31 08:06:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:58,659 INFO L225 Difference]: With dead ends: 37 [2022-01-31 08:06:58,659 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 08:06:58,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:06:58,660 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:58,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:06:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 08:06:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-31 08:06:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-31 08:06:58,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-01-31 08:06:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:58,664 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-31 08:06:58,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-01-31 08:06:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-31 08:06:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 08:06:58,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:58,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:58,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:06:58,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:58,666 INFO L85 PathProgramCache]: Analyzing trace with hash -591776019, now seen corresponding path program 1 times [2022-01-31 08:06:58,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:58,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930205672] [2022-01-31 08:06:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:58,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:58,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:06:58,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930205672] [2022-01-31 08:06:58,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930205672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603292548] [2022-01-31 08:06:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:58,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:58,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:58,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:58,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:06:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:58,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:06:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:06:58,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:06:58,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603292548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:58,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:06:58,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:06:58,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545079607] [2022-01-31 08:06:58,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:58,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:06:58,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:58,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:06:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:06:58,858 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-01-31 08:06:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:58,867 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-01-31 08:06:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:06:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 27 [2022-01-31 08:06:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:58,869 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:06:58,869 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:06:58,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:06:58,870 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:58,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:06:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:06:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 08:06:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-01-31 08:06:58,873 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 27 [2022-01-31 08:06:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:58,873 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-01-31 08:06:58,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-01-31 08:06:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-01-31 08:06:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 08:06:58,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:58,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:58,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:06:59,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:59,106 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:59,107 INFO L85 PathProgramCache]: Analyzing trace with hash -788289524, now seen corresponding path program 1 times [2022-01-31 08:06:59,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:59,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930013438] [2022-01-31 08:06:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:59,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:59,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:06:59,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930013438] [2022-01-31 08:06:59,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930013438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:59,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740340268] [2022-01-31 08:06:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:59,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:59,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:59,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:59,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:06:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:06:59,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:06:59,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:06:59,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740340268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:59,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:59,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:06:59,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866750352] [2022-01-31 08:06:59,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:59,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:06:59,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:59,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:06:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:06:59,403 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-01-31 08:06:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:59,590 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2022-01-31 08:06:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:06:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 27 [2022-01-31 08:06:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:59,591 INFO L225 Difference]: With dead ends: 68 [2022-01-31 08:06:59,591 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 08:06:59,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:06:59,592 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:59,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 28 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:06:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 08:06:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-31 08:06:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-01-31 08:06:59,598 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 27 [2022-01-31 08:06:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:59,598 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-01-31 08:06:59,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-01-31 08:06:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-01-31 08:06:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:06:59,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:59,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:59,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:06:59,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:06:59,824 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:59,825 INFO L85 PathProgramCache]: Analyzing trace with hash 271473901, now seen corresponding path program 2 times [2022-01-31 08:06:59,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:59,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154937448] [2022-01-31 08:06:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:59,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:59,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:06:59,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154937448] [2022-01-31 08:06:59,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154937448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897780547] [2022-01-31 08:06:59,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:06:59,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:59,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:59,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:59,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:07:00,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:07:00,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:07:00,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:07:00,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:07:00,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897780547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:00,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:00,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:07:00,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482855203] [2022-01-31 08:07:00,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:00,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:07:00,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:07:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:07:00,220 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:00,518 INFO L93 Difference]: Finished difference Result 146 states and 198 transitions. [2022-01-31 08:07:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:07:00,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 08:07:00,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:00,520 INFO L225 Difference]: With dead ends: 146 [2022-01-31 08:07:00,520 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 08:07:00,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:07:00,521 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 487 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:00,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 33 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:07:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 08:07:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-01-31 08:07:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.375886524822695) internal successors, (194), 141 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2022-01-31 08:07:00,529 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 63 [2022-01-31 08:07:00,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:00,529 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2022-01-31 08:07:00,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2022-01-31 08:07:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 08:07:00,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:00,532 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:00,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:00,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:00,748 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:00,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1097436033, now seen corresponding path program 3 times [2022-01-31 08:07:00,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:00,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978192875] [2022-01-31 08:07:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:00,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:00,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-01-31 08:07:00,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:00,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978192875] [2022-01-31 08:07:00,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978192875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:00,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43706804] [2022-01-31 08:07:00,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:07:00,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:00,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:00,951 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:00,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:07:01,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:07:01,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:07:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:01,134 INFO L387 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 [2022-01-31 08:07:01,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:07:01,728 INFO L387 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 41 treesize of output 33 [2022-01-31 08:07:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-01-31 08:07:01,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:02,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-01-31 08:07:02,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-31 08:07:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-01-31 08:07:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43706804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:02,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:02,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 26 [2022-01-31 08:07:02,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358899567] [2022-01-31 08:07:02,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:02,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:07:02,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:07:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:07:02,430 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 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) [2022-01-31 08:07:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:02,635 INFO L93 Difference]: Finished difference Result 291 states and 395 transitions. [2022-01-31 08:07:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 08:07:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 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 135 [2022-01-31 08:07:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:02,638 INFO L225 Difference]: With dead ends: 291 [2022-01-31 08:07:02,638 INFO L226 Difference]: Without dead ends: 291 [2022-01-31 08:07:02,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 08:07:02,639 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 111 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:02,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 63 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 31 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2022-01-31 08:07:02,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-31 08:07:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 223. [2022-01-31 08:07:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.3944954128440368) internal successors, (304), 218 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 308 transitions. [2022-01-31 08:07:02,649 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 308 transitions. Word has length 135 [2022-01-31 08:07:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:02,649 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 308 transitions. [2022-01-31 08:07:02,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 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) [2022-01-31 08:07:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 308 transitions. [2022-01-31 08:07:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 08:07:02,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:02,651 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:02,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:02,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:02,865 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:02,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2024660192, now seen corresponding path program 1 times [2022-01-31 08:07:02,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:02,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907037332] [2022-01-31 08:07:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:02,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:02,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-01-31 08:07:03,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907037332] [2022-01-31 08:07:03,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907037332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:03,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713303098] [2022-01-31 08:07:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:03,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:03,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:03,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:07:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 08:07:03,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-01-31 08:07:03,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-01-31 08:07:03,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713303098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:03,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:03,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-31 08:07:03,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238612086] [2022-01-31 08:07:03,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:03,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 08:07:03,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 08:07:03,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 08:07:03,744 INFO L87 Difference]: Start difference. First operand 223 states and 308 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 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) [2022-01-31 08:07:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:04,402 INFO L93 Difference]: Finished difference Result 573 states and 784 transitions. [2022-01-31 08:07:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 08:07:04,402 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 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 137 [2022-01-31 08:07:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:04,404 INFO L225 Difference]: With dead ends: 573 [2022-01-31 08:07:04,404 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 08:07:04,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 08:07:04,405 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1217 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:04,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 38 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:07:04,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 08:07:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 501. [2022-01-31 08:07:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 496 states have (on average 1.3991935483870968) internal successors, (694), 496 states have internal predecessors, (694), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 698 transitions. [2022-01-31 08:07:04,424 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 698 transitions. Word has length 137 [2022-01-31 08:07:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:04,424 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 698 transitions. [2022-01-31 08:07:04,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 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) [2022-01-31 08:07:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 698 transitions. [2022-01-31 08:07:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 08:07:04,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:04,429 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:04,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:04,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:04,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1231033030, now seen corresponding path program 2 times [2022-01-31 08:07:04,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:04,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176876060] [2022-01-31 08:07:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:04,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2022-01-31 08:07:05,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:05,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176876060] [2022-01-31 08:07:05,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176876060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:05,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547773718] [2022-01-31 08:07:05,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:07:05,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:05,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:05,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:05,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:07:05,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:07:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 08:07:05,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2022-01-31 08:07:05,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2022-01-31 08:07:07,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547773718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:07,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:07,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-01-31 08:07:07,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919190681] [2022-01-31 08:07:07,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:07,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 08:07:07,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:07,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 08:07:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 08:07:07,018 INFO L87 Difference]: Start difference. First operand 501 states and 698 transitions. Second operand has 54 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 53 states have internal predecessors, (124), 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) [2022-01-31 08:07:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:09,511 INFO L93 Difference]: Finished difference Result 1153 states and 1584 transitions. [2022-01-31 08:07:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 08:07:09,512 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 53 states have internal predecessors, (124), 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 303 [2022-01-31 08:07:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:09,517 INFO L225 Difference]: With dead ends: 1153 [2022-01-31 08:07:09,517 INFO L226 Difference]: Without dead ends: 1153 [2022-01-31 08:07:09,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 08:07:09,521 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3374 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3374 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:09,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3374 Valid, 43 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 08:07:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-01-31 08:07:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1021. [2022-01-31 08:07:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1016 states have (on average 1.3996062992125984) internal successors, (1422), 1016 states have internal predecessors, (1422), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1426 transitions. [2022-01-31 08:07:09,549 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1426 transitions. Word has length 303 [2022-01-31 08:07:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:09,551 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1426 transitions. [2022-01-31 08:07:09,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 53 states have internal predecessors, (124), 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) [2022-01-31 08:07:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1426 transitions. [2022-01-31 08:07:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2022-01-31 08:07:09,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:09,566 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:09,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:09,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:09,791 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash -687244302, now seen corresponding path program 3 times [2022-01-31 08:07:09,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:09,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163259018] [2022-01-31 08:07:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:09,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:10,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 12350 trivial. 0 not checked. [2022-01-31 08:07:10,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:10,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163259018] [2022-01-31 08:07:10,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163259018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:10,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817323058] [2022-01-31 08:07:10,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:07:10,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:10,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:10,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:10,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:07:11,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:07:11,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 08:07:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:11,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 08:07:11,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-31 08:07:14,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:07:14,998 INFO L387 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 19 treesize of output 19 [2022-01-31 08:07:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 196 proven. 296 refuted. 0 times theorem prover too weak. 14358 trivial. 0 not checked. [2022-01-31 08:07:15,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:17,646 INFO L353 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-01-31 08:07:17,647 INFO L387 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 41 treesize of output 29 [2022-01-31 08:07:17,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-01-31 08:07:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 14358 trivial. 0 not checked. [2022-01-31 08:07:18,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817323058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:18,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:18,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 11, 11] total 70 [2022-01-31 08:07:18,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686974486] [2022-01-31 08:07:18,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:18,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 08:07:18,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 08:07:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1856, Invalid=2974, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 08:07:18,096 INFO L87 Difference]: Start difference. First operand 1021 states and 1426 transitions. Second operand has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 69 states have internal predecessors, (176), 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) [2022-01-31 08:07:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:20,778 INFO L93 Difference]: Finished difference Result 2353 states and 3310 transitions. [2022-01-31 08:07:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 08:07:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 69 states have internal predecessors, (176), 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 615 [2022-01-31 08:07:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:20,785 INFO L225 Difference]: With dead ends: 2353 [2022-01-31 08:07:20,785 INFO L226 Difference]: Without dead ends: 2353 [2022-01-31 08:07:20,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1441 GetRequests, 1280 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9151, Invalid=16931, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 08:07:20,791 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 266 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:20,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 121 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 214 Invalid, 0 Unknown, 168 Unchecked, 0.3s Time] [2022-01-31 08:07:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-01-31 08:07:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1708. [2022-01-31 08:07:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1703 states have (on average 1.4104521432765706) internal successors, (2402), 1703 states have internal predecessors, (2402), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2406 transitions. [2022-01-31 08:07:20,826 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2406 transitions. Word has length 615 [2022-01-31 08:07:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:20,826 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 2406 transitions. [2022-01-31 08:07:20,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 69 states have internal predecessors, (176), 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) [2022-01-31 08:07:20,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2406 transitions. [2022-01-31 08:07:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-01-31 08:07:20,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:20,852 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:20,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:21,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:21,073 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1469071854, now seen corresponding path program 1 times [2022-01-31 08:07:21,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:21,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776908207] [2022-01-31 08:07:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:21,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:21,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14951 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 14803 trivial. 0 not checked. [2022-01-31 08:07:21,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:21,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776908207] [2022-01-31 08:07:21,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776908207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:21,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:21,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:07:21,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938933822] [2022-01-31 08:07:21,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:21,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:07:21,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:21,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:07:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:07:21,263 INFO L87 Difference]: Start difference. First operand 1708 states and 2406 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-01-31 08:07:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:21,292 INFO L93 Difference]: Finished difference Result 1461 states and 2009 transitions. [2022-01-31 08:07:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:07:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 617 [2022-01-31 08:07:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:21,297 INFO L225 Difference]: With dead ends: 1461 [2022-01-31 08:07:21,297 INFO L226 Difference]: Without dead ends: 1461 [2022-01-31 08:07:21,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:07:21,298 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:21,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 39 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-01-31 08:07:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1069. [2022-01-31 08:07:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1064 states have (on average 1.3787593984962405) internal successors, (1467), 1064 states have internal predecessors, (1467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1471 transitions. [2022-01-31 08:07:21,310 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1471 transitions. Word has length 617 [2022-01-31 08:07:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:21,313 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1471 transitions. [2022-01-31 08:07:21,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-01-31 08:07:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1471 transitions. [2022-01-31 08:07:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-01-31 08:07:21,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:21,320 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:21,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 08:07:21,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1938391761, now seen corresponding path program 1 times [2022-01-31 08:07:21,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:21,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151628613] [2022-01-31 08:07:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:21,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:21,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14951 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 14607 trivial. 0 not checked. [2022-01-31 08:07:21,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:21,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151628613] [2022-01-31 08:07:21,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151628613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:21,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:21,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:07:21,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909261131] [2022-01-31 08:07:21,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:21,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:07:21,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:07:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:21,526 INFO L87 Difference]: Start difference. First operand 1069 states and 1471 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2022-01-31 08:07:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:21,583 INFO L93 Difference]: Finished difference Result 1269 states and 1671 transitions. [2022-01-31 08:07:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:07:21,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 617 [2022-01-31 08:07:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:21,587 INFO L225 Difference]: With dead ends: 1269 [2022-01-31 08:07:21,588 INFO L226 Difference]: Without dead ends: 1269 [2022-01-31 08:07:21,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:07:21,589 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:21,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-01-31 08:07:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1166. [2022-01-31 08:07:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1161 states have (on average 1.3040482342807924) internal successors, (1514), 1161 states have internal predecessors, (1514), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1518 transitions. [2022-01-31 08:07:21,601 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1518 transitions. Word has length 617 [2022-01-31 08:07:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:21,601 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 1518 transitions. [2022-01-31 08:07:21,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2022-01-31 08:07:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1518 transitions. [2022-01-31 08:07:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-01-31 08:07:21,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:21,608 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:21,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 08:07:21,608 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:21,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1719726383, now seen corresponding path program 1 times [2022-01-31 08:07:21,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:21,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432276965] [2022-01-31 08:07:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:21,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:21,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14951 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 14607 trivial. 0 not checked. [2022-01-31 08:07:21,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432276965] [2022-01-31 08:07:21,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432276965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:21,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:21,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:07:21,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609862866] [2022-01-31 08:07:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:21,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:07:21,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:07:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:21,789 INFO L87 Difference]: Start difference. First operand 1166 states and 1518 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2022-01-31 08:07:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:21,845 INFO L93 Difference]: Finished difference Result 1216 states and 1518 transitions. [2022-01-31 08:07:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:07:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 617 [2022-01-31 08:07:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:21,848 INFO L225 Difference]: With dead ends: 1216 [2022-01-31 08:07:21,848 INFO L226 Difference]: Without dead ends: 1216 [2022-01-31 08:07:21,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:07:21,849 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:21,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 44 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-01-31 08:07:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1166. [2022-01-31 08:07:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1161 states have (on average 1.2609819121447028) internal successors, (1464), 1161 states have internal predecessors, (1464), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1468 transitions. [2022-01-31 08:07:21,861 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1468 transitions. Word has length 617 [2022-01-31 08:07:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:21,861 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 1468 transitions. [2022-01-31 08:07:21,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2022-01-31 08:07:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1468 transitions. [2022-01-31 08:07:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-01-31 08:07:21,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:21,865 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:21,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 08:07:21,865 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:21,866 INFO L85 PathProgramCache]: Analyzing trace with hash 55073103, now seen corresponding path program 1 times [2022-01-31 08:07:21,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:21,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428199622] [2022-01-31 08:07:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:21,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14951 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 12350 trivial. 0 not checked. [2022-01-31 08:07:22,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:22,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428199622] [2022-01-31 08:07:22,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428199622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:22,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421008454] [2022-01-31 08:07:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:22,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:22,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:22,984 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:23,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:07:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 08:07:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14951 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 12350 trivial. 0 not checked. [2022-01-31 08:07:24,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14951 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 12350 trivial. 0 not checked. [2022-01-31 08:07:26,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421008454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:26,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:26,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-01-31 08:07:26,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764701654] [2022-01-31 08:07:26,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:26,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 08:07:26,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 08:07:26,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 08:07:26,712 INFO L87 Difference]: Start difference. First operand 1166 states and 1468 transitions. Second operand has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 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) [2022-01-31 08:07:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:35,761 INFO L93 Difference]: Finished difference Result 2520 states and 3147 transitions. [2022-01-31 08:07:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 08:07:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 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 617 [2022-01-31 08:07:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:35,772 INFO L225 Difference]: With dead ends: 2520 [2022-01-31 08:07:35,772 INFO L226 Difference]: Without dead ends: 2520 [2022-01-31 08:07:35,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1393 GetRequests, 1183 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6988 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=16802, Invalid=27930, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 08:07:35,777 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6915 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 1303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6915 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1303 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:35,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6915 Valid, 58 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1303 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 08:07:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-01-31 08:07:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2406. [2022-01-31 08:07:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2401 states have (on average 1.2611411911703456) internal successors, (3028), 2401 states have internal predecessors, (3028), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3032 transitions. [2022-01-31 08:07:35,800 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3032 transitions. Word has length 617 [2022-01-31 08:07:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:35,800 INFO L470 AbstractCegarLoop]: Abstraction has 2406 states and 3032 transitions. [2022-01-31 08:07:35,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 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) [2022-01-31 08:07:35,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3032 transitions. [2022-01-31 08:07:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2022-01-31 08:07:35,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:35,812 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 104, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:35,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:36,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:07:36,031 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1789048357, now seen corresponding path program 2 times [2022-01-31 08:07:36,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:36,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860303004] [2022-01-31 08:07:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:36,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:38,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 64584 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53768 trivial. 0 not checked. [2022-01-31 08:07:38,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860303004] [2022-01-31 08:07:38,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860303004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202501350] [2022-01-31 08:07:38,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:07:38,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:38,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:38,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:38,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:07:39,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:07:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 3931 conjuncts, 106 conjunts are in the unsatisfiable core [2022-01-31 08:07:39,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64584 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53768 trivial. 0 not checked. [2022-01-31 08:07:40,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64584 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53768 trivial. 0 not checked. [2022-01-31 08:07:48,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202501350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:48,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:48,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2022-01-31 08:07:48,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970477779] [2022-01-31 08:07:48,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:48,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 214 states [2022-01-31 08:07:48,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2022-01-31 08:07:48,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22580, Invalid=23002, Unknown=0, NotChecked=0, Total=45582 [2022-01-31 08:07:48,880 INFO L87 Difference]: Start difference. First operand 2406 states and 3032 transitions. Second operand has 214 states, 214 states have (on average 2.088785046728972) internal successors, (447), 213 states have internal predecessors, (447), 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) [2022-01-31 08:09:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:09:10,589 INFO L93 Difference]: Finished difference Result 5062 states and 6325 transitions. [2022-01-31 08:09:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2022-01-31 08:09:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 214 states, 214 states have (on average 2.088785046728972) internal successors, (447), 213 states have internal predecessors, (447), 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 1263 [2022-01-31 08:09:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:09:10,620 INFO L225 Difference]: With dead ends: 5062 [2022-01-31 08:09:10,620 INFO L226 Difference]: Without dead ends: 5062 [2022-01-31 08:09:10,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2844 GetRequests, 2422 SyntacticMatches, 0 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28029 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=67311, Invalid=112041, Unknown=0, NotChecked=0, Total=179352 [2022-01-31 08:09:10,627 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 15681 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3617 mSolverCounterSat, 2884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15681 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 6501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2884 IncrementalHoareTripleChecker+Valid, 3617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:09:10,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15681 Valid, 58 Invalid, 6501 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2884 Valid, 3617 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-01-31 08:09:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2022-01-31 08:09:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 4844. [2022-01-31 08:09:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4844 states, 4839 states have (on average 1.2610043397396156) internal successors, (6102), 4839 states have internal predecessors, (6102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4844 states to 4844 states and 6106 transitions. [2022-01-31 08:09:10,791 INFO L78 Accepts]: Start accepts. Automaton has 4844 states and 6106 transitions. Word has length 1263 [2022-01-31 08:09:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:09:10,791 INFO L470 AbstractCegarLoop]: Abstraction has 4844 states and 6106 transitions. [2022-01-31 08:09:10,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 214 states, 214 states have (on average 2.088785046728972) internal successors, (447), 213 states have internal predecessors, (447), 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) [2022-01-31 08:09:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4844 states and 6106 transitions. [2022-01-31 08:09:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2536 [2022-01-31 08:09:10,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:09:10,850 INFO L514 BasicCegarLoop]: trace histogram [210, 210, 210, 210, 210, 210, 210, 210, 209, 209, 209, 209, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:09:10,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 08:09:11,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 08:09:11,073 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:09:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:09:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1605756495, now seen corresponding path program 3 times [2022-01-31 08:09:11,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:09:11,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798490801] [2022-01-31 08:09:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:09:11,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:09:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:26,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:09:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 263970 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 219870 trivial. 0 not checked. [2022-01-31 08:09:26,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:09:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798490801] [2022-01-31 08:09:26,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798490801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:09:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621580843] [2022-01-31 08:09:26,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:09:26,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:09:26,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:09:26,302 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:09:26,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:09:26,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:09:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:09:26,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:09:26,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:09:28,389 INFO L387 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 [2022-01-31 08:09:38,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:09:38,388 INFO L387 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 41 treesize of output 33 [2022-01-31 08:09:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 263970 backedges. 837 proven. 1255 refuted. 0 times theorem prover too weak. 261878 trivial. 0 not checked. [2022-01-31 08:09:38,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:09:50,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-01-31 08:09:50,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-31 08:09:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 263970 backedges. 628 proven. 1464 refuted. 0 times theorem prover too weak. 261878 trivial. 0 not checked. [2022-01-31 08:09:51,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621580843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:09:51,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:09:51,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 9, 9] total 226 [2022-01-31 08:09:51,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139948302] [2022-01-31 08:09:51,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:09:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 226 states [2022-01-31 08:09:51,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:09:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2022-01-31 08:09:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24110, Invalid=26740, Unknown=0, NotChecked=0, Total=50850 [2022-01-31 08:09:51,124 INFO L87 Difference]: Start difference. First operand 4844 states and 6106 transitions. Second operand has 226 states, 226 states have (on average 2.15929203539823) internal successors, (488), 225 states have internal predecessors, (488), 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) [2022-01-31 08:10:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:10:58,961 INFO L93 Difference]: Finished difference Result 10322 states and 12847 transitions. [2022-01-31 08:10:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-01-31 08:10:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 226 states, 226 states have (on average 2.15929203539823) internal successors, (488), 225 states have internal predecessors, (488), 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 2535 [2022-01-31 08:10:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:10:59,002 INFO L225 Difference]: With dead ends: 10322 [2022-01-31 08:10:59,003 INFO L226 Difference]: Without dead ends: 10322 [2022-01-31 08:10:59,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5723 GetRequests, 5275 SyntacticMatches, 1 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26301 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=74262, Invalid=126890, Unknown=0, NotChecked=0, Total=201152 [2022-01-31 08:10:59,015 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 9805 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 3074 mSolverCounterSat, 1601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9805 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 6485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1601 IncrementalHoareTripleChecker+Valid, 3074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1810 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:10:59,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9805 Valid, 156 Invalid, 6485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1601 Valid, 3074 Invalid, 0 Unknown, 1810 Unchecked, 3.2s Time] [2022-01-31 08:10:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10322 states. [2022-01-31 08:10:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10322 to 4884. [2022-01-31 08:10:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4884 states, 4879 states have (on average 1.2609141217462594) internal successors, (6152), 4879 states have internal predecessors, (6152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4884 states to 4884 states and 6156 transitions. [2022-01-31 08:10:59,109 INFO L78 Accepts]: Start accepts. Automaton has 4884 states and 6156 transitions. Word has length 2535 [2022-01-31 08:10:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:10:59,110 INFO L470 AbstractCegarLoop]: Abstraction has 4884 states and 6156 transitions. [2022-01-31 08:10:59,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 226 states, 226 states have (on average 2.15929203539823) internal successors, (488), 225 states have internal predecessors, (488), 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) [2022-01-31 08:10:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4884 states and 6156 transitions. [2022-01-31 08:10:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2542 [2022-01-31 08:10:59,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:10:59,152 INFO L514 BasicCegarLoop]: trace histogram [213, 213, 210, 210, 210, 210, 210, 210, 210, 209, 209, 209, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:10:59,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:10:59,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 08:10:59,370 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:10:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:10:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2071964010, now seen corresponding path program 1 times [2022-01-31 08:10:59,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:10:59,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97833152] [2022-01-31 08:10:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:10:59,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:10:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:11:11,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:11:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:11:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 265239 backedges. 0 proven. 45369 refuted. 0 times theorem prover too weak. 219870 trivial. 0 not checked. [2022-01-31 08:11:11,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:11:11,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97833152] [2022-01-31 08:11:11,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97833152] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:11:11,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708020968] [2022-01-31 08:11:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:11:11,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:11:11,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:11:11,542 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:11:11,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:11:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:11:12,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 7878 conjuncts, 215 conjunts are in the unsatisfiable core [2022-01-31 08:11:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:11:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 265239 backedges. 0 proven. 45369 refuted. 0 times theorem prover too weak. 219870 trivial. 0 not checked. [2022-01-31 08:11:16,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:11:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 265239 backedges. 0 proven. 45369 refuted. 0 times theorem prover too weak. 219870 trivial. 0 not checked. [2022-01-31 08:11:50,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708020968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:11:50,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:11:50,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [217, 216, 216] total 432 [2022-01-31 08:11:50,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072896208] [2022-01-31 08:11:50,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:11:50,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 432 states [2022-01-31 08:11:50,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:11:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 432 interpolants. [2022-01-31 08:11:50,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92667, Invalid=93525, Unknown=0, NotChecked=0, Total=186192 [2022-01-31 08:11:50,745 INFO L87 Difference]: Start difference. First operand 4884 states and 6156 transitions. Second operand has 432 states, 432 states have (on average 2.0416666666666665) internal successors, (882), 431 states have internal predecessors, (882), 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)