/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-crafted/zero_sum4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:54:56,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:54:56,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:54:56,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:54:56,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:54:56,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:54:56,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:54:56,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:54:56,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:54:56,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:54:56,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:54:56,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:54:56,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:54:56,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:54:56,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:54:56,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:54:56,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:54:56,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:54:56,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:54:56,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:54:56,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:54:56,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:54:56,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:54:56,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:54:56,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 09:54:56,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 09:54:56,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 09:54:56,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 09:54:56,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 09:54:56,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 09:54:56,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:54:56,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:54:56,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:54:56,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:54:56,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:54:56,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:54:56,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:54:56,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:54:56,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:54:56,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:54:56,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:54:56,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:54:56,154 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:54:56,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:54:56,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:54:56,155 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:54:56,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:54:56,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:54:56,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:54:56,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:54:56,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:54:56,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:54:56,157 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:54:56,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:54:56,157 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:54:56,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:54:56,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:54:56,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:54:56,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:54:56,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:54:56,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:54:56,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:54:56,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:54:56,159 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:54:56,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:54:56,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:54:56,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:54:56,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:54:56,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:54:56,358 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:54:56,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c [2022-01-31 09:54:56,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135f6ad7a/b1654285c6f942afa1170c8caa45f894/FLAGf0e60d10b [2022-01-31 09:54:56,768 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:54:56,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum4.c [2022-01-31 09:54:56,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135f6ad7a/b1654285c6f942afa1170c8caa45f894/FLAGf0e60d10b [2022-01-31 09:54:56,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135f6ad7a/b1654285c6f942afa1170c8caa45f894 [2022-01-31 09:54:56,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:54:56,786 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:54:56,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:54:56,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:54:56,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:54:56,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53815e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56, skipping insertion in model container [2022-01-31 09:54:56,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:54:56,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:54:56,918 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-crafted/zero_sum4.c[400,413] [2022-01-31 09:54:56,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:54:56,939 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:54:56,947 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-crafted/zero_sum4.c[400,413] [2022-01-31 09:54:56,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:54:56,961 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:54:56,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56 WrapperNode [2022-01-31 09:54:56,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:54:56,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:54:56,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:54:56,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:54:56,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:54:56,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:54:56,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:54:56,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:54:56,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (1/1) ... [2022-01-31 09:54:56,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:54:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:54:57,016 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 09:54:57,021 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 09:54:57,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:54:57,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:54:57,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:54:57,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:54:57,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:54:57,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:54:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:54:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:54:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:54:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:54:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:54:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:54:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 09:54:57,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:54:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:54:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:54:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:54:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:54:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:54:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:54:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:54:57,088 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:54:57,089 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:54:57,296 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:54:57,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:54:57,300 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-31 09:54:57,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:54:57 BoogieIcfgContainer [2022-01-31 09:54:57,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:54:57,302 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:54:57,302 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:54:57,303 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:54:57,305 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:54:57" (1/1) ... [2022-01-31 09:54:57,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:54:57 BasicIcfg [2022-01-31 09:54:57,319 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:54:57,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:54:57,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:54:57,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:54:57,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:54:56" (1/4) ... [2022-01-31 09:54:57,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b81a127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:54:57, skipping insertion in model container [2022-01-31 09:54:57,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:56" (2/4) ... [2022-01-31 09:54:57,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b81a127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:54:57, skipping insertion in model container [2022-01-31 09:54:57,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:54:57" (3/4) ... [2022-01-31 09:54:57,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b81a127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:54:57, skipping insertion in model container [2022-01-31 09:54:57,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:54:57" (4/4) ... [2022-01-31 09:54:57,324 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum4.cJordan [2022-01-31 09:54:57,328 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:54:57,328 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:54:57,356 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:54:57,360 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 09:54:57,361 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:54:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 39 states have internal predecessors, (59), 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 09:54:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:54:57,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:54:57,390 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, 1] [2022-01-31 09:54:57,390 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:54:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:54:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1013109943, now seen corresponding path program 1 times [2022-01-31 09:54:57,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:54:57,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993744064] [2022-01-31 09:54:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:54:57,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:54:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:57,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:54:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:57,588 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 09:54:57,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:54:57,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993744064] [2022-01-31 09:54:57,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993744064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:54:57,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:54:57,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:54:57,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297148538] [2022-01-31 09:54:57,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:54:57,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:54:57,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:54:57,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:54:57,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:54:57,622 INFO L87 Difference]: Start difference. First operand has 46 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 39 states have internal predecessors, (59), 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 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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 09:54:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:54:57,708 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-01-31 09:54:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:54:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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 28 [2022-01-31 09:54:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:54:57,731 INFO L225 Difference]: With dead ends: 46 [2022-01-31 09:54:57,731 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 09:54:57,732 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 09:54:57,735 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:54:57,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 59 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:54:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 09:54:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-31 09:54:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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 09:54:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-01-31 09:54:57,778 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2022-01-31 09:54:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:54:57,779 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-01-31 09:54:57,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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 09:54:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-01-31 09:54:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:54:57,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:54:57,780 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, 1] [2022-01-31 09:54:57,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:54:57,781 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:54:57,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:54:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash 231468864, now seen corresponding path program 1 times [2022-01-31 09:54:57,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:54:57,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107920908] [2022-01-31 09:54:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:54:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:54:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:57,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:54:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:57,881 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 09:54:57,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:54:57,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107920908] [2022-01-31 09:54:57,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107920908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:54:57,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:54:57,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:54:57,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352486812] [2022-01-31 09:54:57,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:54:57,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:54:57,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:54:57,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:54:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:54:57,885 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 09:54:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:54:57,943 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-01-31 09:54:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:54:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 28 [2022-01-31 09:54:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:54:57,944 INFO L225 Difference]: With dead ends: 40 [2022-01-31 09:54:57,944 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 09:54:57,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:54:57,945 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:54:57,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:54:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 09:54:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 09:54:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 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 09:54:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-01-31 09:54:57,950 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2022-01-31 09:54:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:54:57,950 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-01-31 09:54:57,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 09:54:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-01-31 09:54:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 09:54:57,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:54:57,951 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, 1, 1, 1] [2022-01-31 09:54:57,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:54:57,951 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:54:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:54:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1499136157, now seen corresponding path program 1 times [2022-01-31 09:54:57,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:54:57,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243873467] [2022-01-31 09:54:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:54:57,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:54:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:58,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:54:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:54:58,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:54:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243873467] [2022-01-31 09:54:58,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243873467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:54:58,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:54:58,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:54:58,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958776708] [2022-01-31 09:54:58,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:54:58,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:54:58,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:54:58,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:54:58,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:54:58,034 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 09:54:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:54:58,127 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-01-31 09:54:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:54:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 30 [2022-01-31 09:54:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:54:58,132 INFO L225 Difference]: With dead ends: 55 [2022-01-31 09:54:58,133 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:54:58,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:54:58,136 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:54:58,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:54:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:54:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2022-01-31 09:54:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 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 09:54:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-01-31 09:54:58,140 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2022-01-31 09:54:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:54:58,140 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-01-31 09:54:58,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 09:54:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-01-31 09:54:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 09:54:58,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:54:58,141 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:54:58,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:54:58,141 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:54:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:54:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2103548915, now seen corresponding path program 1 times [2022-01-31 09:54:58,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:54:58,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370308427] [2022-01-31 09:54:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:54:58,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:54:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:58,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:54:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 09:54:58,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:54:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370308427] [2022-01-31 09:54:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370308427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:54:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021381939] [2022-01-31 09:54:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:54:58,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:54:58,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:54:58,251 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 09:54:58,252 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 09:54:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:58,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:54:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:54:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 09:54:58,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:54:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 09:54:58,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021381939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:54:58,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:54:58,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:54:58,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859189771] [2022-01-31 09:54:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:54:58,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:54:58,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:54:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:54:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:54:58,590 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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 09:54:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:54:58,687 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-01-31 09:54:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:54:58,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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 46 [2022-01-31 09:54:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:54:58,688 INFO L225 Difference]: With dead ends: 50 [2022-01-31 09:54:58,689 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 09:54:58,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:54:58,694 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:54:58,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 109 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:54:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 09:54:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 09:54:58,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 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 09:54:58,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-31 09:54:58,699 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2022-01-31 09:54:58,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:54:58,699 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-31 09:54:58,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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 09:54:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-31 09:54:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 09:54:58,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:54:58,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:54:58,726 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 09:54:58,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:54:58,906 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:54:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:54:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1345275862, now seen corresponding path program 2 times [2022-01-31 09:54:58,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:54:58,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98863107] [2022-01-31 09:54:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:54:58,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:54:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:58,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:54:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 09:54:58,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:54:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98863107] [2022-01-31 09:54:58,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98863107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:54:58,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806633908] [2022-01-31 09:54:58,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:54:58,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:54:58,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:54:58,988 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 09:54:58,989 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 09:54:59,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:54:59,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:54:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:54:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:54:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 09:54:59,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:54:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 09:54:59,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806633908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:54:59,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:54:59,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-31 09:54:59,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237004798] [2022-01-31 09:54:59,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:54:59,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 09:54:59,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:54:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 09:54:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:54:59,272 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 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 09:54:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:54:59,394 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-01-31 09:54:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 09:54:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 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 48 [2022-01-31 09:54:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:54:59,395 INFO L225 Difference]: With dead ends: 73 [2022-01-31 09:54:59,395 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 09:54:59,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:54:59,396 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:54:59,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:54:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 09:54:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-01-31 09:54:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 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 09:54:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-01-31 09:54:59,400 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2022-01-31 09:54:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:54:59,400 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-01-31 09:54:59,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 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 09:54:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-01-31 09:54:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 09:54:59,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:54:59,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:54:59,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 09:54:59,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:54:59,616 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:54:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:54:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1077297562, now seen corresponding path program 3 times [2022-01-31 09:54:59,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:54:59,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5747710] [2022-01-31 09:54:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:54:59,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:54:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:00,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:00,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5747710] [2022-01-31 09:55:00,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5747710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744577605] [2022-01-31 09:55:00,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:55:00,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:00,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:00,764 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 09:55:00,765 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 09:55:00,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:55:00,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 85 conjunts are in the unsatisfiable core [2022-01-31 09:55:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:00,915 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 09:55:02,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:55:02,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 29 [2022-01-31 09:55:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:02,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:12,185 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 72 treesize of output 64 [2022-01-31 09:55:12,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:55:12,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 246 treesize of output 215 [2022-01-31 09:55:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:12,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744577605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:12,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:12,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 29] total 67 [2022-01-31 09:55:12,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598541827] [2022-01-31 09:55:12,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:12,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 09:55:12,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:12,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 09:55:12,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=4011, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 09:55:12,546 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 67 states, 67 states have (on average 2.5522388059701493) internal successors, (171), 64 states have internal predecessors, (171), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:15,032 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2022-01-31 09:55:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 09:55:15,032 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.5522388059701493) internal successors, (171), 64 states have internal predecessors, (171), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 09:55:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:15,035 INFO L225 Difference]: With dead ends: 172 [2022-01-31 09:55:15,035 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 09:55:15,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 86 SyntacticMatches, 43 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 4110 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=908, Invalid=8794, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 09:55:15,037 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1359 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:15,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 282 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 508 Invalid, 0 Unknown, 1359 Unchecked, 0.3s Time] [2022-01-31 09:55:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 09:55:15,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 116. [2022-01-31 09:55:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.1711711711711712) internal successors, (130), 111 states have internal predecessors, (130), 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 09:55:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2022-01-31 09:55:15,044 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 64 [2022-01-31 09:55:15,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:15,044 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2022-01-31 09:55:15,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.5522388059701493) internal successors, (171), 64 states have internal predecessors, (171), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2022-01-31 09:55:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 09:55:15,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:15,046 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:15,065 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 09:55:15,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:15,263 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1107239128, now seen corresponding path program 4 times [2022-01-31 09:55:15,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:15,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176553588] [2022-01-31 09:55:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:15,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:15,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 09:55:15,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176553588] [2022-01-31 09:55:15,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176553588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867040645] [2022-01-31 09:55:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:55:15,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:15,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:15,341 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 09:55:15,345 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 09:55:15,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:55:15,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:15,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:55:15,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 09:55:15,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 09:55:15,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867040645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:15,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:15,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 09:55:15,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073560232] [2022-01-31 09:55:15,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:15,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:55:15,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:55:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:55:15,618 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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 09:55:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:15,838 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2022-01-31 09:55:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:55:15,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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 66 [2022-01-31 09:55:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:15,839 INFO L225 Difference]: With dead ends: 164 [2022-01-31 09:55:15,839 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 09:55:15,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:55:15,840 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:15,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 110 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:55:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 09:55:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-31 09:55:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 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 09:55:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2022-01-31 09:55:15,847 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 66 [2022-01-31 09:55:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:15,847 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2022-01-31 09:55:15,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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 09:55:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2022-01-31 09:55:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 09:55:15,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:15,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:15,865 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 09:55:16,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:16,055 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:16,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2146220939, now seen corresponding path program 5 times [2022-01-31 09:55:16,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:16,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215529790] [2022-01-31 09:55:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:16,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:16,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 09:55:16,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:16,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215529790] [2022-01-31 09:55:16,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215529790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:16,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220176529] [2022-01-31 09:55:16,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:55:16,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:16,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:16,119 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 09:55:16,120 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 09:55:16,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 09:55:16,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:55:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 09:55:16,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 09:55:16,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220176529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:16,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:16,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-31 09:55:16,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312724402] [2022-01-31 09:55:16,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:16,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 09:55:16,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 09:55:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:55:16,474 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 19 states have internal predecessors, (95), 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 09:55:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:16,780 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-01-31 09:55:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:55:16,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 19 states have internal predecessors, (95), 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 68 [2022-01-31 09:55:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:16,781 INFO L225 Difference]: With dead ends: 101 [2022-01-31 09:55:16,781 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 09:55:16,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:55:16,782 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 155 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:16,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 81 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:55:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 09:55:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2022-01-31 09:55:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 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 09:55:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-01-31 09:55:16,785 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2022-01-31 09:55:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:16,786 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-01-31 09:55:16,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 19 states have internal predecessors, (95), 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 09:55:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-01-31 09:55:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 09:55:16,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:16,789 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:16,807 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 09:55:16,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:16,996 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1592186855, now seen corresponding path program 6 times [2022-01-31 09:55:16,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:16,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593249204] [2022-01-31 09:55:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:16,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:19,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:19,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:19,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593249204] [2022-01-31 09:55:19,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593249204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:19,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067719401] [2022-01-31 09:55:19,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:55:19,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:19,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:19,079 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 09:55:19,079 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 09:55:19,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 09:55:19,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:19,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 111 conjunts are in the unsatisfiable core [2022-01-31 09:55:19,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:19,256 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 09:55:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:20,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:22,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067719401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:22,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:22,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 33, 37] total 107 [2022-01-31 09:55:22,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920520499] [2022-01-31 09:55:22,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:22,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 09:55:22,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:22,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 09:55:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=10654, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 09:55:22,970 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:28,866 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2022-01-31 09:55:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 09:55:28,867 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 09:55:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:28,868 INFO L225 Difference]: With dead ends: 251 [2022-01-31 09:55:28,868 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 09:55:28,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 102 SyntacticMatches, 20 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8732 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1450, Invalid=19142, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 09:55:28,871 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 247 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 5599 mSolverCounterSat, 1107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 6706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1107 IncrementalHoareTripleChecker+Valid, 5599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:28,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 394 Invalid, 6706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1107 Valid, 5599 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 09:55:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 09:55:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 138. [2022-01-31 09:55:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 133 states have internal predecessors, (149), 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 09:55:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 153 transitions. [2022-01-31 09:55:28,876 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 153 transitions. Word has length 82 [2022-01-31 09:55:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:28,876 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 153 transitions. [2022-01-31 09:55:28,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 153 transitions. [2022-01-31 09:55:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 09:55:28,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:28,877 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:28,895 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 09:55:29,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:29,088 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:29,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1154657858, now seen corresponding path program 7 times [2022-01-31 09:55:29,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665288598] [2022-01-31 09:55:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:29,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:29,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-31 09:55:29,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665288598] [2022-01-31 09:55:29,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665288598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951017399] [2022-01-31 09:55:29,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:55:29,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:29,163 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 09:55:29,164 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 09:55:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:55:29,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-31 09:55:29,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-31 09:55:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951017399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:29,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:29,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:55:29,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200417063] [2022-01-31 09:55:29,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:29,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:55:29,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:29,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:55:29,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:55:29,492 INFO L87 Difference]: Start difference. First operand 138 states and 153 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 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 09:55:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:29,701 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2022-01-31 09:55:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:55:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 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 86 [2022-01-31 09:55:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:29,702 INFO L225 Difference]: With dead ends: 109 [2022-01-31 09:55:29,702 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 09:55:29,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:55:29,702 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 222 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:29,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 55 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:55:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 09:55:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2022-01-31 09:55:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 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 09:55:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2022-01-31 09:55:29,705 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 86 [2022-01-31 09:55:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:29,706 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2022-01-31 09:55:29,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 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 09:55:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2022-01-31 09:55:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 09:55:29,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:29,707 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:29,724 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 09:55:29,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:29,916 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:29,917 INFO L85 PathProgramCache]: Analyzing trace with hash -791709964, now seen corresponding path program 8 times [2022-01-31 09:55:29,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:29,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597554164] [2022-01-31 09:55:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:29,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:33,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:33,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:33,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597554164] [2022-01-31 09:55:33,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597554164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:33,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854222555] [2022-01-31 09:55:33,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:55:33,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:33,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:33,386 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 09:55:33,387 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 09:55:33,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:55:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 143 conjunts are in the unsatisfiable core [2022-01-31 09:55:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:55:35,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:36,729 INFO L353 Elim1Store]: treesize reduction 227, result has 43.3 percent of original size [2022-01-31 09:55:36,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 186 [2022-01-31 09:55:37,175 INFO L353 Elim1Store]: treesize reduction 383, result has 4.3 percent of original size [2022-01-31 09:55:37,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 29 [2022-01-31 09:55:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:55:37,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854222555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:37,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:37,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 24, 21] total 90 [2022-01-31 09:55:37,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246955824] [2022-01-31 09:55:37,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:37,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 09:55:37,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 09:55:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=7541, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 09:55:37,273 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 90 states, 90 states have (on average 2.6777777777777776) internal successors, (241), 87 states have internal predecessors, (241), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:44,404 INFO L93 Difference]: Finished difference Result 298 states and 330 transitions. [2022-01-31 09:55:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 09:55:44,404 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.6777777777777776) internal successors, (241), 87 states have internal predecessors, (241), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 09:55:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:44,405 INFO L225 Difference]: With dead ends: 298 [2022-01-31 09:55:44,405 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 09:55:44,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 164 SyntacticMatches, 29 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6220 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1259, Invalid=16563, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 09:55:44,407 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 168 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 7082 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 8219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 7082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:44,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 437 Invalid, 8219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 7082 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 09:55:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 09:55:44,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 168. [2022-01-31 09:55:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.098159509202454) internal successors, (179), 163 states have internal predecessors, (179), 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 09:55:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2022-01-31 09:55:44,423 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 100 [2022-01-31 09:55:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:44,423 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2022-01-31 09:55:44,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.6777777777777776) internal successors, (241), 87 states have internal predecessors, (241), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2022-01-31 09:55:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 09:55:44,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:44,425 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:44,443 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 09:55:44,627 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,SelfDestructingSolverStorable10 [2022-01-31 09:55:44,629 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -720650033, now seen corresponding path program 9 times [2022-01-31 09:55:44,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:44,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122378418] [2022-01-31 09:55:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:44,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 09:55:44,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122378418] [2022-01-31 09:55:44,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122378418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211279662] [2022-01-31 09:55:44,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:55:44,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:44,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:44,721 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 09:55:44,722 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 09:55:44,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 09:55:44,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:55:44,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 09:55:44,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 09:55:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211279662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:45,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:45,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:55:45,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763652213] [2022-01-31 09:55:45,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:45,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:55:45,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:55:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:55:45,122 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 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 09:55:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:45,396 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2022-01-31 09:55:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 09:55:45,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 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 104 [2022-01-31 09:55:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:45,397 INFO L225 Difference]: With dead ends: 127 [2022-01-31 09:55:45,397 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 09:55:45,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2022-01-31 09:55:45,398 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 228 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:45,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 67 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:55:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 09:55:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-01-31 09:55:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 114 states have internal predecessors, (123), 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 09:55:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2022-01-31 09:55:45,400 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 104 [2022-01-31 09:55:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:45,400 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2022-01-31 09:55:45,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 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 09:55:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2022-01-31 09:55:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 09:55:45,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:45,401 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:45,418 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 09:55:45,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:45,613 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:45,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2032439615, now seen corresponding path program 10 times [2022-01-31 09:55:45,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:45,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814132586] [2022-01-31 09:55:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:45,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:51,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:51,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:51,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814132586] [2022-01-31 09:55:51,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814132586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:51,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276335865] [2022-01-31 09:55:51,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:55:51,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:51,317 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 09:55:51,320 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 09:55:51,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:55:51,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:51,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 167 conjunts are in the unsatisfiable core [2022-01-31 09:55:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:55:54,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:57,275 INFO L353 Elim1Store]: treesize reduction 378, result has 41.8 percent of original size [2022-01-31 09:55:57,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 285 [2022-01-31 09:55:58,573 INFO L353 Elim1Store]: treesize reduction 628, result has 3.2 percent of original size [2022-01-31 09:55:58,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 36 [2022-01-31 09:55:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:55:58,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276335865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:58,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:58,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 25, 25] total 117 [2022-01-31 09:55:58,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334198654] [2022-01-31 09:55:58,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:58,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 09:55:58,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 09:55:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=13082, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 09:55:58,695 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 117 states, 117 states have (on average 2.5213675213675213) internal successors, (295), 114 states have internal predecessors, (295), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:16,110 INFO L93 Difference]: Finished difference Result 456 states and 501 transitions. [2022-01-31 09:56:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 09:56:16,111 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.5213675213675213) internal successors, (295), 114 states have internal predecessors, (295), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 09:56:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:16,112 INFO L225 Difference]: With dead ends: 456 [2022-01-31 09:56:16,112 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 09:56:16,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 189 SyntacticMatches, 30 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13150 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=2699, Invalid=42033, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 09:56:16,115 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 313 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 9446 mSolverCounterSat, 1980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 11426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1980 IncrementalHoareTripleChecker+Valid, 9446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:16,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 399 Invalid, 11426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1980 Valid, 9446 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-01-31 09:56:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 09:56:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 250. [2022-01-31 09:56:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.089795918367347) internal successors, (267), 245 states have internal predecessors, (267), 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 09:56:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 271 transitions. [2022-01-31 09:56:16,120 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 271 transitions. Word has length 118 [2022-01-31 09:56:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:16,120 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 271 transitions. [2022-01-31 09:56:16,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.5213675213675213) internal successors, (295), 114 states have internal predecessors, (295), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 271 transitions. [2022-01-31 09:56:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 09:56:16,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:16,121 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:16,138 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 09:56:16,327 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,SelfDestructingSolverStorable12 [2022-01-31 09:56:16,327 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1149121508, now seen corresponding path program 11 times [2022-01-31 09:56:16,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219726970] [2022-01-31 09:56:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:16,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:16,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-01-31 09:56:16,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:16,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219726970] [2022-01-31 09:56:16,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219726970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:56:16,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799798335] [2022-01-31 09:56:16,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:56:16,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:16,440 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 09:56:16,443 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 09:56:16,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 09:56:16,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:56:16,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:56:16,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:56:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-01-31 09:56:16,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:56:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-01-31 09:56:17,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799798335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:56:17,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:56:17,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 09:56:17,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536478344] [2022-01-31 09:56:17,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:56:17,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:56:17,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:56:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:56:17,029 INFO L87 Difference]: Start difference. First operand 250 states and 271 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 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 09:56:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:17,368 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2022-01-31 09:56:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 09:56:17,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 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 122 [2022-01-31 09:56:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:17,369 INFO L225 Difference]: With dead ends: 145 [2022-01-31 09:56:17,369 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 09:56:17,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 236 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 09:56:17,370 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 441 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:17,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 67 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:56:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 09:56:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 137. [2022-01-31 09:56:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0681818181818181) internal successors, (141), 132 states have internal predecessors, (141), 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 09:56:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2022-01-31 09:56:17,372 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 122 [2022-01-31 09:56:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:17,373 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2022-01-31 09:56:17,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 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 09:56:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2022-01-31 09:56:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 09:56:17,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:17,373 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:17,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:56:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 09:56:17,581 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1438781262, now seen corresponding path program 12 times [2022-01-31 09:56:17,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:17,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439196325] [2022-01-31 09:56:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:17,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:56:24,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439196325] [2022-01-31 09:56:24,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439196325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:56:24,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009723379] [2022-01-31 09:56:24,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:56:24,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:24,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:24,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:56:24,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:56:24,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 09:56:24,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:56:24,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 222 conjunts are in the unsatisfiable core [2022-01-31 09:56:24,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:56:24,742 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 09:56:32,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:56:32,346 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 35 treesize of output 23 [2022-01-31 09:56:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 3 proven. 320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:56:32,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:56:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:56:47,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009723379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:56:47,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:56:47,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 39, 32] total 152 [2022-01-31 09:56:47,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78106079] [2022-01-31 09:56:47,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:56:47,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 09:56:47,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 09:56:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=21917, Unknown=1, NotChecked=0, Total=22952 [2022-01-31 09:56:47,239 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 152 states, 152 states have (on average 2.414473684210526) internal successors, (367), 149 states have internal predecessors, (367), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:04,506 INFO L93 Difference]: Finished difference Result 331 states and 354 transitions. [2022-01-31 09:57:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 09:57:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.414473684210526) internal successors, (367), 149 states have internal predecessors, (367), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-01-31 09:57:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:04,508 INFO L225 Difference]: With dead ends: 331 [2022-01-31 09:57:04,508 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 09:57:04,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 194 SyntacticMatches, 48 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23993 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=3587, Invalid=62718, Unknown=1, NotChecked=0, Total=66306 [2022-01-31 09:57:04,511 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 8414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3367 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:04,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 532 Invalid, 8414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 4444 Invalid, 0 Unknown, 3367 Unchecked, 2.4s Time] [2022-01-31 09:57:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 09:57:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 256. [2022-01-31 09:57:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0756972111553784) internal successors, (270), 251 states have internal predecessors, (270), 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 09:57:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 274 transitions. [2022-01-31 09:57:04,516 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 274 transitions. Word has length 136 [2022-01-31 09:57:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:04,516 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 274 transitions. [2022-01-31 09:57:04,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.414473684210526) internal successors, (367), 149 states have internal predecessors, (367), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 274 transitions. [2022-01-31 09:57:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 09:57:04,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:04,517 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:04,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 09:57:04,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 09:57:04,735 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash 600723852, now seen corresponding path program 13 times [2022-01-31 09:57:04,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:04,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071121765] [2022-01-31 09:57:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:04,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:04,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-01-31 09:57:04,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071121765] [2022-01-31 09:57:04,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071121765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:04,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309011638] [2022-01-31 09:57:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:57:04,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:04,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:04,867 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:57:04,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:57:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:57:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:57:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-01-31 09:57:05,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-01-31 09:57:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309011638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:57:05,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:57:05,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 09:57:05,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141887084] [2022-01-31 09:57:05,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:57:05,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:57:05,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:57:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:57:05,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:57:05,482 INFO L87 Difference]: Start difference. First operand 256 states and 274 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 09:57:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:05,963 INFO L93 Difference]: Finished difference Result 341 states and 356 transitions. [2022-01-31 09:57:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 09:57:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 138 [2022-01-31 09:57:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:05,964 INFO L225 Difference]: With dead ends: 341 [2022-01-31 09:57:05,964 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 09:57:05,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:57:05,965 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:05,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 118 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:57:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 09:57:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-01-31 09:57:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0717488789237668) internal successors, (239), 223 states have internal predecessors, (239), 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 09:57:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 243 transitions. [2022-01-31 09:57:05,969 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 243 transitions. Word has length 138 [2022-01-31 09:57:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:05,969 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 243 transitions. [2022-01-31 09:57:05,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 09:57:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 243 transitions. [2022-01-31 09:57:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 09:57:05,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:05,970 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:05,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:57:06,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 09:57:06,187 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 549724201, now seen corresponding path program 14 times [2022-01-31 09:57:06,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:06,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496143100] [2022-01-31 09:57:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:06,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:06,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-01-31 09:57:06,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:06,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496143100] [2022-01-31 09:57:06,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496143100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:06,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390962313] [2022-01-31 09:57:06,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:57:06,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:06,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:06,313 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:57:06,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 09:57:06,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:57:06,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:57:06,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:57:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:57:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-01-31 09:57:06,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-01-31 09:57:06,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390962313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:57:06,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:57:06,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 09:57:06,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061721485] [2022-01-31 09:57:06,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:57:06,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:57:06,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:57:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:57:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:57:06,822 INFO L87 Difference]: Start difference. First operand 228 states and 243 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 09:57:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:07,205 INFO L93 Difference]: Finished difference Result 163 states and 171 transitions. [2022-01-31 09:57:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 09:57:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 140 [2022-01-31 09:57:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:07,206 INFO L225 Difference]: With dead ends: 163 [2022-01-31 09:57:07,206 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 09:57:07,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 271 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=979, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:57:07,207 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 430 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:07,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 67 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:57:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 09:57:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 155. [2022-01-31 09:57:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.06) internal successors, (159), 150 states have internal predecessors, (159), 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 09:57:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2022-01-31 09:57:07,210 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 140 [2022-01-31 09:57:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:07,210 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2022-01-31 09:57:07,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 09:57:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2022-01-31 09:57:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 09:57:07,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:07,211 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:07,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 09:57:07,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:07,423 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:07,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1694062437, now seen corresponding path program 15 times [2022-01-31 09:57:07,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:07,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932650728] [2022-01-31 09:57:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:07,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:17,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 50 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:57:17,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:17,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932650728] [2022-01-31 09:57:17,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932650728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:17,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321311674] [2022-01-31 09:57:17,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:57:17,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:17,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:17,609 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:57:17,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 09:57:17,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 09:57:17,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:57:17,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 254 conjunts are in the unsatisfiable core [2022-01-31 09:57:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:57:25,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:25,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:57:25,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 109 [2022-01-31 09:57:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 7 proven. 425 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:57:25,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:44,494 INFO L353 Elim1Store]: treesize reduction 945, result has 33.4 percent of original size [2022-01-31 09:57:44,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 256 treesize of output 511 [2022-01-31 09:58:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:58:18,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321311674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:18,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:18,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 42, 37] total 164 [2022-01-31 09:58:18,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960882685] [2022-01-31 09:58:18,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:18,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 09:58:18,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:18,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 09:58:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1059, Invalid=25673, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 09:58:18,466 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 164 states, 164 states have (on average 2.481707317073171) internal successors, (407), 161 states have internal predecessors, (407), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:40,285 INFO L93 Difference]: Finished difference Result 327 states and 347 transitions. [2022-01-31 09:58:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 09:58:40,285 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.481707317073171) internal successors, (407), 161 states have internal predecessors, (407), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-01-31 09:58:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:40,286 INFO L225 Difference]: With dead ends: 327 [2022-01-31 09:58:40,286 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 09:58:40,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 227 SyntacticMatches, 66 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25959 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=3753, Invalid=75489, Unknown=0, NotChecked=0, Total=79242 [2022-01-31 09:58:40,291 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 3910 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 6908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 3910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2606 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:40,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 429 Invalid, 6908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 3910 Invalid, 0 Unknown, 2606 Unchecked, 1.9s Time] [2022-01-31 09:58:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 09:58:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 274. [2022-01-31 09:58:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.066914498141264) internal successors, (287), 269 states have internal predecessors, (287), 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 09:58:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 291 transitions. [2022-01-31 09:58:40,295 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 291 transitions. Word has length 154 [2022-01-31 09:58:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:40,296 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 291 transitions. [2022-01-31 09:58:40,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.481707317073171) internal successors, (407), 161 states have internal predecessors, (407), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 291 transitions. [2022-01-31 09:58:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 09:58:40,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:40,297 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:40,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:40,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 09:58:40,515 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 710003609, now seen corresponding path program 16 times [2022-01-31 09:58:40,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:40,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251770127] [2022-01-31 09:58:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:40,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:40,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-01-31 09:58:40,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:40,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251770127] [2022-01-31 09:58:40,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251770127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:40,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704121221] [2022-01-31 09:58:40,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:58:40,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:40,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:40,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:40,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 09:58:40,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:58:40,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:40,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:58:40,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-01-31 09:58:41,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-01-31 09:58:41,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704121221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:41,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:41,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 09:58:41,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611131905] [2022-01-31 09:58:41,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:41,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:58:41,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:58:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:58:41,285 INFO L87 Difference]: Start difference. First operand 274 states and 291 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 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 09:58:41,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:41,907 INFO L93 Difference]: Finished difference Result 387 states and 402 transitions. [2022-01-31 09:58:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:58:41,907 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 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 156 [2022-01-31 09:58:41,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:41,908 INFO L225 Difference]: With dead ends: 387 [2022-01-31 09:58:41,908 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 09:58:41,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=338, Invalid=1222, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:58:41,909 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:41,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 157 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 09:58:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 09:58:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-01-31 09:58:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.0632411067193677) internal successors, (269), 253 states have internal predecessors, (269), 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 09:58:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 273 transitions. [2022-01-31 09:58:41,913 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 273 transitions. Word has length 156 [2022-01-31 09:58:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:41,913 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 273 transitions. [2022-01-31 09:58:41,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 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 09:58:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 273 transitions. [2022-01-31 09:58:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 09:58:41,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:41,914 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:41,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-31 09:58:42,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:42,133 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash -265417482, now seen corresponding path program 17 times [2022-01-31 09:58:42,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:42,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245855361] [2022-01-31 09:58:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:42,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:42,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-01-31 09:58:42,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245855361] [2022-01-31 09:58:42,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245855361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777521012] [2022-01-31 09:58:42,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:58:42,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:42,290 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:42,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 09:58:42,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-31 09:58:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:42,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:58:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-01-31 09:58:42,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-01-31 09:58:43,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777521012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:43,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:43,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 09:58:43,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403252685] [2022-01-31 09:58:43,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:43,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:58:43,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:58:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:58:43,163 INFO L87 Difference]: Start difference. First operand 258 states and 273 transitions. Second operand has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 29 states have internal predecessors, (112), 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 09:58:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:43,573 INFO L93 Difference]: Finished difference Result 181 states and 189 transitions. [2022-01-31 09:58:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 09:58:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 29 states have internal predecessors, (112), 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 158 [2022-01-31 09:58:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:43,574 INFO L225 Difference]: With dead ends: 181 [2022-01-31 09:58:43,574 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 09:58:43,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=436, Invalid=1204, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 09:58:43,575 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 438 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:43,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 69 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:58:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 09:58:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 173. [2022-01-31 09:58:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0535714285714286) internal successors, (177), 168 states have internal predecessors, (177), 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 09:58:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 181 transitions. [2022-01-31 09:58:43,578 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 181 transitions. Word has length 158 [2022-01-31 09:58:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:43,578 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 181 transitions. [2022-01-31 09:58:43,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 29 states have internal predecessors, (112), 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 09:58:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 181 transitions. [2022-01-31 09:58:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 09:58:43,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:43,579 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:43,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:43,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:43,794 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1577547096, now seen corresponding path program 18 times [2022-01-31 09:58:43,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:43,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773080514] [2022-01-31 09:58:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:43,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:55,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:56,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773080514] [2022-01-31 09:58:56,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773080514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89837591] [2022-01-31 09:58:56,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:58:56,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:56,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:56,005 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:56,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 09:58:56,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-31 09:58:56,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:56,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 286 conjunts are in the unsatisfiable core [2022-01-31 09:58:56,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:56,313 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 09:59:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:10,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:59:10,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 217 treesize of output 355 [2022-01-31 09:59:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 15 proven. 512 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:59:11,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 527 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:59:33,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89837591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:33,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:33,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 43, 40] total 186 [2022-01-31 09:59:33,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460729030] [2022-01-31 09:59:33,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:33,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2022-01-31 09:59:33,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2022-01-31 09:59:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=32726, Unknown=0, NotChecked=0, Total=34410 [2022-01-31 09:59:33,445 INFO L87 Difference]: Start difference. First operand 173 states and 181 transitions. Second operand has 186 states, 186 states have (on average 2.5) internal successors, (465), 183 states have internal predecessors, (465), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:08,160 INFO L93 Difference]: Finished difference Result 324 states and 341 transitions. [2022-01-31 10:00:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-01-31 10:00:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 2.5) internal successors, (465), 183 states have internal predecessors, (465), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-01-31 10:00:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:08,162 INFO L225 Difference]: With dead ends: 324 [2022-01-31 10:00:08,162 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 10:00:08,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 266 SyntacticMatches, 53 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34608 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=5472, Invalid=94700, Unknown=0, NotChecked=0, Total=100172 [2022-01-31 10:00:08,166 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 5080 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 8556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 5080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3031 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:08,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 494 Invalid, 8556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 5080 Invalid, 0 Unknown, 3031 Unchecked, 2.9s Time] [2022-01-31 10:00:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 10:00:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 250. [2022-01-31 10:00:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0571428571428572) internal successors, (259), 245 states have internal predecessors, (259), 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 10:00:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 263 transitions. [2022-01-31 10:00:08,170 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 263 transitions. Word has length 172 [2022-01-31 10:00:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 263 transitions. [2022-01-31 10:00:08,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 2.5) internal successors, (465), 183 states have internal predecessors, (465), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 263 transitions. [2022-01-31 10:00:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 10:00:08,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:08,172 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:08,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 10:00:08,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:08,380 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:08,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1012096614, now seen corresponding path program 19 times [2022-01-31 10:00:08,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:08,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750716357] [2022-01-31 10:00:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:08,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:08,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-01-31 10:00:08,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:08,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750716357] [2022-01-31 10:00:08,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750716357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744333145] [2022-01-31 10:00:08,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:00:08,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:08,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:08,576 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:08,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:00:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:00:08,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-01-31 10:00:09,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:00:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-01-31 10:00:09,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744333145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:09,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:09,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 10:00:09,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552032263] [2022-01-31 10:00:09,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:09,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:00:09,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:09,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:00:09,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:00:09,388 INFO L87 Difference]: Start difference. First operand 250 states and 263 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 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 10:00:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:09,959 INFO L93 Difference]: Finished difference Result 397 states and 410 transitions. [2022-01-31 10:00:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 10:00:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 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 174 [2022-01-31 10:00:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:09,961 INFO L225 Difference]: With dead ends: 397 [2022-01-31 10:00:09,962 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 10:00:09,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 10:00:09,962 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 176 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:09,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 105 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:00:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 10:00:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2022-01-31 10:00:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.05668016194332) internal successors, (261), 247 states have internal predecessors, (261), 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 10:00:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 265 transitions. [2022-01-31 10:00:09,966 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 265 transitions. Word has length 174 [2022-01-31 10:00:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:09,966 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 265 transitions. [2022-01-31 10:00:09,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 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 10:00:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 265 transitions. [2022-01-31 10:00:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 10:00:09,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:09,967 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:09,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 10:00:10,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:10,176 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1125719421, now seen corresponding path program 20 times [2022-01-31 10:00:10,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:10,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077632049] [2022-01-31 10:00:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:10,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:10,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-01-31 10:00:10,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:10,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077632049] [2022-01-31 10:00:10,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077632049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:10,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377203698] [2022-01-31 10:00:10,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:00:10,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:10,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:10,355 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:10,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:00:10,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:00:10,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:00:10,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:00:10,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-01-31 10:00:10,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:00:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-01-31 10:00:11,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377203698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:11,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:11,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 10:00:11,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555565400] [2022-01-31 10:00:11,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:11,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:00:11,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:00:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:00:11,054 INFO L87 Difference]: Start difference. First operand 252 states and 265 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 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 10:00:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:11,561 INFO L93 Difference]: Finished difference Result 199 states and 207 transitions. [2022-01-31 10:00:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 10:00:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 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 176 [2022-01-31 10:00:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:11,563 INFO L225 Difference]: With dead ends: 199 [2022-01-31 10:00:11,563 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 10:00:11,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 341 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 10:00:11,563 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 581 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:11,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 71 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:00:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 10:00:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2022-01-31 10:00:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0483870967741935) internal successors, (195), 186 states have internal predecessors, (195), 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 10:00:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 199 transitions. [2022-01-31 10:00:11,567 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 199 transitions. Word has length 176 [2022-01-31 10:00:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:11,567 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 199 transitions. [2022-01-31 10:00:11,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 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 10:00:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 199 transitions. [2022-01-31 10:00:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 10:00:11,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:11,568 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:11,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-31 10:00:11,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 10:00:11,786 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash -927791755, now seen corresponding path program 21 times [2022-01-31 10:00:11,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:11,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572646916] [2022-01-31 10:00:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:11,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:28,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 84 proven. 645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:00:28,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:28,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572646916] [2022-01-31 10:00:28,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572646916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:28,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200316345] [2022-01-31 10:00:28,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:00:28,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:28,898 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:28,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:00:29,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-31 10:00:29,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:00:29,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 324 conjunts are in the unsatisfiable core [2022-01-31 10:00:29,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:29,277 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 10:00:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:44,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:00:44,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 175 [2022-01-31 10:00:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 9 proven. 704 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:00:45,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:01:20,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200316345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:20,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:20,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 51, 44] total 206 [2022-01-31 10:01:20,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639444748] [2022-01-31 10:01:20,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:20,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-01-31 10:01:20,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:20,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-01-31 10:01:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=40269, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 10:01:20,750 INFO L87 Difference]: Start difference. First operand 191 states and 199 transitions. Second operand has 206 states, 206 states have (on average 2.441747572815534) internal successors, (503), 203 states have internal predecessors, (503), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:03,824 INFO L93 Difference]: Finished difference Result 358 states and 375 transitions. [2022-01-31 10:02:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-01-31 10:02:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.441747572815534) internal successors, (503), 203 states have internal predecessors, (503), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 10:02:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:03,826 INFO L225 Difference]: With dead ends: 358 [2022-01-31 10:02:03,826 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 10:02:03,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 277 SyntacticMatches, 89 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42073 ImplicationChecksByTransitivity, 82.9s TimeCoverageRelationStatistics Valid=5758, Invalid=108148, Unknown=0, NotChecked=0, Total=113906 [2022-01-31 10:02:03,831 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 5828 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 10991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 5828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4413 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:03,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 554 Invalid, 10991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 5828 Invalid, 0 Unknown, 4413 Unchecked, 3.6s Time] [2022-01-31 10:02:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 10:02:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 276. [2022-01-31 10:02:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.051660516605166) internal successors, (285), 271 states have internal predecessors, (285), 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 10:02:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 289 transitions. [2022-01-31 10:02:03,835 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 289 transitions. Word has length 190 [2022-01-31 10:02:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:03,836 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 289 transitions. [2022-01-31 10:02:03,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.441747572815534) internal successors, (503), 203 states have internal predecessors, (503), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 289 transitions. [2022-01-31 10:02:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 10:02:03,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:03,837 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:03,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:04,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 10:02:04,045 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:04,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1638245901, now seen corresponding path program 22 times [2022-01-31 10:02:04,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:04,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748591938] [2022-01-31 10:02:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:04,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:04,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-01-31 10:02:04,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748591938] [2022-01-31 10:02:04,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748591938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005395074] [2022-01-31 10:02:04,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:02:04,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:04,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:04,254 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:02:04,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 10:02:04,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:02:04,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 10:02:04,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-01-31 10:02:04,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-01-31 10:02:05,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005395074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:05,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:05,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 10:02:05,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337724792] [2022-01-31 10:02:05,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:05,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:02:05,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:05,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:02:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 10:02:05,122 INFO L87 Difference]: Start difference. First operand 276 states and 289 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 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 10:02:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:05,999 INFO L93 Difference]: Finished difference Result 439 states and 452 transitions. [2022-01-31 10:02:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:02:06,000 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 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 192 [2022-01-31 10:02:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:06,001 INFO L225 Difference]: With dead ends: 439 [2022-01-31 10:02:06,001 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 10:02:06,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=1769, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 10:02:06,002 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:06,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 136 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 10:02:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 10:02:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2022-01-31 10:02:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 1.0512820512820513) internal successors, (287), 273 states have internal predecessors, (287), 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 10:02:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 291 transitions. [2022-01-31 10:02:06,005 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 291 transitions. Word has length 192 [2022-01-31 10:02:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:06,005 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 291 transitions. [2022-01-31 10:02:06,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 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 10:02:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 291 transitions. [2022-01-31 10:02:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 10:02:06,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:06,006 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:06,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:06,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:06,211 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:06,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1726083280, now seen corresponding path program 23 times [2022-01-31 10:02:06,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:06,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426923181] [2022-01-31 10:02:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:06,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:06,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2022-01-31 10:02:06,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:06,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426923181] [2022-01-31 10:02:06,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426923181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:06,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120601199] [2022-01-31 10:02:06,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:02:06,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:06,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:06,434 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:02:06,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 10:02:07,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-31 10:02:07,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 10:02:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2022-01-31 10:02:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2022-01-31 10:02:07,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120601199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:07,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:07,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 10:02:07,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678516720] [2022-01-31 10:02:07,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:07,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:02:07,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:02:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=969, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 10:02:07,695 INFO L87 Difference]: Start difference. First operand 278 states and 291 transitions. Second operand has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 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 10:02:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:08,222 INFO L93 Difference]: Finished difference Result 217 states and 225 transitions. [2022-01-31 10:02:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 10:02:08,222 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 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 194 [2022-01-31 10:02:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:08,223 INFO L225 Difference]: With dead ends: 217 [2022-01-31 10:02:08,223 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 10:02:08,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 376 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 10:02:08,224 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 360 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:08,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 93 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:02:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 10:02:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 209. [2022-01-31 10:02:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0441176470588236) internal successors, (213), 204 states have internal predecessors, (213), 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 10:02:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 217 transitions. [2022-01-31 10:02:08,228 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 217 transitions. Word has length 194 [2022-01-31 10:02:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:08,228 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 217 transitions. [2022-01-31 10:02:08,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 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 10:02:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 217 transitions. [2022-01-31 10:02:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 10:02:08,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:08,229 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:08,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:08,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:08,443 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1696426242, now seen corresponding path program 24 times [2022-01-31 10:02:08,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:08,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065963945] [2022-01-31 10:02:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:08,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:33,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 86 proven. 814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:33,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065963945] [2022-01-31 10:02:33,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065963945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356068343] [2022-01-31 10:02:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:02:33,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:33,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:33,619 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:02:33,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 10:02:33,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 10:02:33,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:33,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 363 conjunts are in the unsatisfiable core [2022-01-31 10:02:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:34,173 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 10:02:34,188 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 10:02:52,838 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-31 10:02:52,839 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-31 10:02:52,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-01-31 10:02:52,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:53,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 10:02:53,041 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 46 more [2022-01-31 10:02:53,046 INFO L158 Benchmark]: Toolchain (without parser) took 476257.58ms. Allocated memory was 198.2MB in the beginning and 958.4MB in the end (delta: 760.2MB). Free memory was 150.0MB in the beginning and 452.5MB in the end (delta: -302.5MB). Peak memory consumption was 458.8MB. Max. memory is 8.0GB. [2022-01-31 10:02:53,046 INFO L158 Benchmark]: CDTParser took 0.89ms. Allocated memory is still 198.2MB. Free memory is still 166.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 10:02:53,046 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.10ms. Allocated memory is still 198.2MB. Free memory was 149.9MB in the beginning and 174.6MB in the end (delta: -24.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-01-31 10:02:53,046 INFO L158 Benchmark]: Boogie Preprocessor took 23.57ms. Allocated memory is still 198.2MB. Free memory was 174.6MB in the beginning and 173.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 10:02:53,047 INFO L158 Benchmark]: RCFGBuilder took 314.87ms. Allocated memory is still 198.2MB. Free memory was 172.6MB in the beginning and 160.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 10:02:53,047 INFO L158 Benchmark]: IcfgTransformer took 17.25ms. Allocated memory is still 198.2MB. Free memory was 160.0MB in the beginning and 158.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 10:02:53,047 INFO L158 Benchmark]: TraceAbstraction took 475723.31ms. Allocated memory was 198.2MB in the beginning and 958.4MB in the end (delta: 760.2MB). Free memory was 157.9MB in the beginning and 452.5MB in the end (delta: -294.6MB). Peak memory consumption was 466.9MB. Max. memory is 8.0GB. [2022-01-31 10:02:53,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.89ms. Allocated memory is still 198.2MB. Free memory is still 166.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.10ms. Allocated memory is still 198.2MB. Free memory was 149.9MB in the beginning and 174.6MB in the end (delta: -24.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.57ms. Allocated memory is still 198.2MB. Free memory was 174.6MB in the beginning and 173.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 314.87ms. Allocated memory is still 198.2MB. Free memory was 172.6MB in the beginning and 160.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 17.25ms. Allocated memory is still 198.2MB. Free memory was 160.0MB in the beginning and 158.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 475723.31ms. Allocated memory was 198.2MB in the beginning and 958.4MB in the end (delta: 760.2MB). Free memory was 157.9MB in the beginning and 452.5MB in the end (delta: -294.6MB). Peak memory consumption was 466.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...