/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_find_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:53:16,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:53:16,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:53:16,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:53:16,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:53:16,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:53:16,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:53:16,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:53:16,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:53:16,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:53:16,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:53:16,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:53:16,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:53:16,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:53:16,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:53:16,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:53:16,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:53:16,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:53:16,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:53:16,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:53:16,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:53:16,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:53:16,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:53:16,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:53:16,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 07:53:16,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 07:53:16,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 07:53:16,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 07:53:16,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 07:53:16,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 07:53:16,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 07:53:16,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 07:53:16,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 07:53:16,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 07:53:16,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 07:53:16,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 07:53:16,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 07:53:16,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 07:53:16,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:53:16,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:53:16,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:53:16,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:53:16,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:53:16,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:53:16,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:53:16,755 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:53:16,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:53:16,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:53:16,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:53:16,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:53:16,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:53:16,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:53:16,756 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:53:16,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:53:16,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:53:16,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:53:16,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:53:16,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:53:16,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:53:16,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:53:16,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:53:16,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:53:16,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:53:16,758 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:53:16,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:53:16,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:53:16,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:53:16,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:53:16,954 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:53:16,957 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:53:16,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_find_ground-1.i [2022-01-31 07:53:17,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1056d7a2/72fc23d7e626402dbc11de57e2a1e510/FLAG1fde1fb0c [2022-01-31 07:53:17,310 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:53:17,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_find_ground-1.i [2022-01-31 07:53:17,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1056d7a2/72fc23d7e626402dbc11de57e2a1e510/FLAG1fde1fb0c [2022-01-31 07:53:17,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1056d7a2/72fc23d7e626402dbc11de57e2a1e510 [2022-01-31 07:53:17,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:53:17,756 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:53:17,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:53:17,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:53:17,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:53:17,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:17,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9551a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17, skipping insertion in model container [2022-01-31 07:53:17,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:17,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:53:17,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:53:17,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_find_ground-1.i[855,868] [2022-01-31 07:53:17,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:53:17,919 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:53:17,935 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_find_ground-1.i[855,868] [2022-01-31 07:53:17,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:53:17,972 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:53:17,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17 WrapperNode [2022-01-31 07:53:17,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:53:17,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:53:17,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:53:17,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:53:17,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:17,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:17,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:17,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:18,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:18,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:18,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:18,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:53:18,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:53:18,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:53:18,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:53:18,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (1/1) ... [2022-01-31 07:53:18,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:53:18,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:18,042 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 07:53:18,050 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 07:53:18,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:53:18,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:53:18,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:53:18,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:53:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:53:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:53:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:53:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:53:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:53:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:53:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:53:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:53:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:53:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:53:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:53:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:53:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:53:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:53:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:53:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:53:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:53:18,128 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:53:18,130 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:53:18,237 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:53:18,241 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:53:18,241 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 07:53:18,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:53:18 BoogieIcfgContainer [2022-01-31 07:53:18,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:53:18,243 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:53:18,244 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:53:18,253 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:53:18,256 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:53:18" (1/1) ... [2022-01-31 07:53:18,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:53:18 BasicIcfg [2022-01-31 07:53:18,280 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:53:18,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:53:18,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:53:18,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:53:18,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:53:17" (1/4) ... [2022-01-31 07:53:18,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f85497f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:53:18, skipping insertion in model container [2022-01-31 07:53:18,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:53:17" (2/4) ... [2022-01-31 07:53:18,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f85497f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:53:18, skipping insertion in model container [2022-01-31 07:53:18,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:53:18" (3/4) ... [2022-01-31 07:53:18,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f85497f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:53:18, skipping insertion in model container [2022-01-31 07:53:18,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:53:18" (4/4) ... [2022-01-31 07:53:18,293 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_find_ground-1.iJordan [2022-01-31 07:53:18,296 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:53:18,296 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:53:18,347 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:53:18,351 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 07:53:18,352 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:53:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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 07:53:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 07:53:18,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:18,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:18,366 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1138936723, now seen corresponding path program 1 times [2022-01-31 07:53:18,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:18,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687069867] [2022-01-31 07:53:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:18,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:18,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:18,482 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 07:53:18,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:18,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687069867] [2022-01-31 07:53:18,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687069867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:53:18,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:53:18,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:53:18,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887746988] [2022-01-31 07:53:18,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:53:18,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:53:18,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:53:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:53:18,507 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 07:53:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:18,527 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-31 07:53:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:53:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2022-01-31 07:53:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:18,533 INFO L225 Difference]: With dead ends: 27 [2022-01-31 07:53:18,533 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 07:53:18,534 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 07:53:18,536 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:18,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:53:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 07:53:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 07:53:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:53:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 07:53:18,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 07:53:18,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:18,556 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 07:53:18,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 07:53:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 07:53:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:53:18,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:18,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:18,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:53:18,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1060539282, now seen corresponding path program 1 times [2022-01-31 07:53:18,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:18,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046483836] [2022-01-31 07:53:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:18,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:18,617 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 07:53:18,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:18,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046483836] [2022-01-31 07:53:18,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046483836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:53:18,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:53:18,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:53:18,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379965765] [2022-01-31 07:53:18,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:53:18,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:53:18,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:18,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:53:18,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:53:18,620 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 07:53:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:18,672 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-01-31 07:53:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:53:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2022-01-31 07:53:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:18,673 INFO L225 Difference]: With dead ends: 24 [2022-01-31 07:53:18,674 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 07:53:18,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:53:18,680 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:18,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:53:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 07:53:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-31 07:53:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:53:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-31 07:53:18,689 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2022-01-31 07:53:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:18,689 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-31 07:53:18,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 07:53:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-31 07:53:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 07:53:18,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:18,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:18,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:53:18,696 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash 428017333, now seen corresponding path program 1 times [2022-01-31 07:53:18,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:18,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971249171] [2022-01-31 07:53:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:18,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:53:18,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971249171] [2022-01-31 07:53:18,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971249171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:53:18,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686653826] [2022-01-31 07:53:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:18,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:18,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:18,758 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 07:53:18,759 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 07:53:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:53:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:53:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:53:18,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:53:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:53:18,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686653826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:53:18,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:53:18,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:53:18,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766140086] [2022-01-31 07:53:18,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:53:18,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:53:18,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:53:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:53:18,941 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 07:53:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:19,013 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-01-31 07:53:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:53:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 18 [2022-01-31 07:53:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:19,014 INFO L225 Difference]: With dead ends: 29 [2022-01-31 07:53:19,014 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 07:53:19,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:53:19,016 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:19,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 44 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:53:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 07:53:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 07:53:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:53:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-01-31 07:53:19,019 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2022-01-31 07:53:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:19,019 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-01-31 07:53:19,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 07:53:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-01-31 07:53:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 07:53:19,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:19,019 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:19,039 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 07:53:19,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:19,242 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:19,242 INFO L85 PathProgramCache]: Analyzing trace with hash -111162466, now seen corresponding path program 2 times [2022-01-31 07:53:19,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:19,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213332251] [2022-01-31 07:53:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:19,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:53:19,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213332251] [2022-01-31 07:53:19,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213332251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:53:19,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:53:19,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:53:19,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604368290] [2022-01-31 07:53:19,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:53:19,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:53:19,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:53:19,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:53:19,332 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 07:53:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:19,374 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-31 07:53:19,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:53:19,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 24 [2022-01-31 07:53:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:19,376 INFO L225 Difference]: With dead ends: 34 [2022-01-31 07:53:19,376 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 07:53:19,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:53:19,383 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:19,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:53:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 07:53:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 07:53:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:53:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-31 07:53:19,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2022-01-31 07:53:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:19,391 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-31 07:53:19,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 07:53:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-31 07:53:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 07:53:19,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:19,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:19,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 07:53:19,394 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:19,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1801370547, now seen corresponding path program 1 times [2022-01-31 07:53:19,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:19,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355399492] [2022-01-31 07:53:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:19,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:53:19,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355399492] [2022-01-31 07:53:19,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355399492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:53:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599164718] [2022-01-31 07:53:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:19,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:19,464 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 07:53:19,465 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 07:53:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:53:19,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:53:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:53:19,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:53:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:53:19,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599164718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:53:19,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:53:19,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 07:53:19,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229050353] [2022-01-31 07:53:19,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:53:19,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 07:53:19,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 07:53:19,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 07:53:19,666 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 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 07:53:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:19,802 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-01-31 07:53:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 07:53:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 07:53:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:19,803 INFO L225 Difference]: With dead ends: 44 [2022-01-31 07:53:19,803 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 07:53:19,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 07:53:19,803 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:19,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:53:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 07:53:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 07:53:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:53:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-01-31 07:53:19,807 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2022-01-31 07:53:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:19,807 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-01-31 07:53:19,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 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 07:53:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-01-31 07:53:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 07:53:19,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:19,808 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:19,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 07:53:20,017 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 07:53:20,017 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 482089185, now seen corresponding path program 2 times [2022-01-31 07:53:20,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:20,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653262104] [2022-01-31 07:53:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:20,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:20,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:53:20,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653262104] [2022-01-31 07:53:20,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653262104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:53:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346876100] [2022-01-31 07:53:20,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:53:20,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:20,151 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 07:53:20,152 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 07:53:20,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:53:20,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:53:20,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:53:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:53:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:53:20,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:53:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:53:20,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346876100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:53:20,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:53:20,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 07:53:20,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423603917] [2022-01-31 07:53:20,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:53:20,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 07:53:20,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:20,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 07:53:20,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 07:53:20,502 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 07:53:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:20,824 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-01-31 07:53:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 07:53:20,824 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 39 [2022-01-31 07:53:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:20,825 INFO L225 Difference]: With dead ends: 68 [2022-01-31 07:53:20,825 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 07:53:20,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 07:53:20,826 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:20,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 44 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:53:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 07:53:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-31 07:53:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:53:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-01-31 07:53:20,830 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 39 [2022-01-31 07:53:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:20,830 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-01-31 07:53:20,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 07:53:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-01-31 07:53:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 07:53:20,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:20,831 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:20,858 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 07:53:21,047 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 07:53:21,048 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 377836605, now seen corresponding path program 3 times [2022-01-31 07:53:21,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310415534] [2022-01-31 07:53:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:21,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:21,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:53:21,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:21,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310415534] [2022-01-31 07:53:21,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310415534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:53:21,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140016818] [2022-01-31 07:53:21,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:53:21,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:21,338 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 07:53:21,340 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 07:53:21,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 07:53:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:53:21,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 07:53:21,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:53:21,685 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 16 treesize of output 8 [2022-01-31 07:53:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 07:53:21,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:53:21,837 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-01-31 07:53:21,838 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 15 treesize of output 9 [2022-01-31 07:53:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 07:53:21,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140016818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:53:21,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:53:21,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 37 [2022-01-31 07:53:21,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772680615] [2022-01-31 07:53:21,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:53:21,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 07:53:21,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:21,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 07:53:21,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 07:53:21,938 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 3 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 07:53:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:22,617 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-01-31 07:53:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 07:53:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 3 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 63 [2022-01-31 07:53:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:22,619 INFO L225 Difference]: With dead ends: 80 [2022-01-31 07:53:22,619 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 07:53:22,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 07:53:22,622 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:22,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 73 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:53:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 07:53:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-01-31 07:53:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 69 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:53:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-01-31 07:53:22,626 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 63 [2022-01-31 07:53:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:22,626 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-01-31 07:53:22,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 3 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 07:53:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-01-31 07:53:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 07:53:22,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:22,627 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:22,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 07:53:22,828 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 07:53:22,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1464622290, now seen corresponding path program 1 times [2022-01-31 07:53:22,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:22,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561627366] [2022-01-31 07:53:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:22,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:23,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 07:53:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:53:23,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:23,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561627366] [2022-01-31 07:53:23,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561627366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:53:23,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393880475] [2022-01-31 07:53:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:23,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:23,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:23,110 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 07:53:23,111 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 07:53:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 07:53:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:53:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 07:53:23,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:53:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:53:23,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393880475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:53:23,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:53:23,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-01-31 07:53:23,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398610330] [2022-01-31 07:53:23,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:53:23,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 07:53:23,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 07:53:23,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 07:53:23,935 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:53:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:24,922 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2022-01-31 07:53:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 07:53:24,923 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-01-31 07:53:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:24,925 INFO L225 Difference]: With dead ends: 126 [2022-01-31 07:53:24,925 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 07:53:24,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 07:53:24,929 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 137 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:24,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 64 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:53:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 07:53:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-01-31 07:53:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 119 states have internal predecessors, (123), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:53:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-01-31 07:53:24,946 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 73 [2022-01-31 07:53:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:24,947 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-01-31 07:53:24,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:53:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-01-31 07:53:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 07:53:24,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:24,949 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:24,977 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 07:53:25,173 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 07:53:25,174 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:25,174 INFO L85 PathProgramCache]: Analyzing trace with hash -28190685, now seen corresponding path program 2 times [2022-01-31 07:53:25,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:25,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079520332] [2022-01-31 07:53:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:25,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:26,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:26,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 07:53:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:53:26,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:26,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079520332] [2022-01-31 07:53:26,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079520332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:53:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077505995] [2022-01-31 07:53:26,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:53:26,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:26,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:26,065 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 07:53:26,066 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 07:53:26,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:53:26,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:53:26,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 07:53:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:53:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 07:53:26,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:53:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:53:28,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077505995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:53:28,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:53:28,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-01-31 07:53:28,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150632675] [2022-01-31 07:53:28,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:53:28,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 07:53:28,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:28,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 07:53:28,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 07:53:28,552 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 102 states, 102 states have (on average 2.1372549019607843) internal successors, (218), 101 states have internal predecessors, (218), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:53:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:31,689 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-01-31 07:53:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 07:53:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.1372549019607843) internal successors, (218), 101 states have internal predecessors, (218), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-01-31 07:53:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:31,697 INFO L225 Difference]: With dead ends: 226 [2022-01-31 07:53:31,697 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 07:53:31,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 07:53:31,704 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 213 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:31,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 64 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:53:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 07:53:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-01-31 07:53:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 218 states have (on average 1.0229357798165137) internal successors, (223), 219 states have internal predecessors, (223), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:53:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 230 transitions. [2022-01-31 07:53:31,724 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 230 transitions. Word has length 123 [2022-01-31 07:53:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:31,724 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 230 transitions. [2022-01-31 07:53:31,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.1372549019607843) internal successors, (218), 101 states have internal predecessors, (218), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:53:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 230 transitions. [2022-01-31 07:53:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 07:53:31,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:31,726 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:31,749 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 07:53:31,943 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 07:53:31,944 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1214381133, now seen corresponding path program 3 times [2022-01-31 07:53:31,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:31,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979517791] [2022-01-31 07:53:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:31,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:34,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:34,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-01-31 07:53:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9611 backedges. 2 proven. 9604 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:53:34,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:34,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979517791] [2022-01-31 07:53:34,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979517791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:53:34,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92054858] [2022-01-31 07:53:34,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:53:34,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:34,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:34,816 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 07:53:34,817 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 07:53:34,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 07:53:34,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:53:34,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 07:53:34,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:53:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9611 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-01-31 07:53:35,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:53:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9611 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-01-31 07:53:35,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92054858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:53:35,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:53:35,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 6, 6] total 108 [2022-01-31 07:53:35,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143334341] [2022-01-31 07:53:35,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:53:35,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 07:53:35,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 07:53:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5072, Invalid=6484, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 07:53:35,778 INFO L87 Difference]: Start difference. First operand 226 states and 230 transitions. Second operand has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:53:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:53:39,855 INFO L93 Difference]: Finished difference Result 238 states and 244 transitions. [2022-01-31 07:53:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 07:53:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 223 [2022-01-31 07:53:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:53:39,857 INFO L225 Difference]: With dead ends: 238 [2022-01-31 07:53:39,857 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 07:53:39,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6046 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15593, Invalid=28717, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 07:53:39,874 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 334 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:53:39,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 59 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:53:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 07:53:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-01-31 07:53:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 223 states have (on average 1.0269058295964126) internal successors, (229), 224 states have internal predecessors, (229), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:53:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 236 transitions. [2022-01-31 07:53:39,887 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 236 transitions. Word has length 223 [2022-01-31 07:53:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:53:39,887 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 236 transitions. [2022-01-31 07:53:39,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:53:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 236 transitions. [2022-01-31 07:53:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 07:53:39,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:53:39,889 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:53:39,915 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 07:53:40,115 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 07:53:40,118 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:53:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:53:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1518866799, now seen corresponding path program 4 times [2022-01-31 07:53:40,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:53:40,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322303293] [2022-01-31 07:53:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:53:40,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:53:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:53:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:43,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-01-31 07:53:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:53:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9814 backedges. 2 proven. 9801 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 07:53:43,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:53:43,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322303293] [2022-01-31 07:53:43,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322303293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:53:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485840427] [2022-01-31 07:53:43,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:53:43,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:53:43,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:53:43,056 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 07:53:43,057 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 07:53:43,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:53:43,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:53:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-31 07:53:43,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:53:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9814 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 07:53:43,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:53:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9814 backedges. 2 proven. 9801 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 07:53:51,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485840427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:53:51,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:53:51,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-01-31 07:53:51,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652484861] [2022-01-31 07:53:51,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:53:51,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-01-31 07:53:51,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:53:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-01-31 07:53:51,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 07:53:51,988 INFO L87 Difference]: Start difference. First operand 231 states and 236 transitions. Second operand has 204 states, 204 states have (on average 2.0686274509803924) internal successors, (422), 203 states have internal predecessors, (422), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:54:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:54:03,974 INFO L93 Difference]: Finished difference Result 433 states and 438 transitions. [2022-01-31 07:54:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-31 07:54:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 2.0686274509803924) internal successors, (422), 203 states have internal predecessors, (422), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 228 [2022-01-31 07:54:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:54:03,977 INFO L225 Difference]: With dead ends: 433 [2022-01-31 07:54:03,977 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 07:54:03,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25444 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=61106, Invalid=101706, Unknown=0, NotChecked=0, Total=162812 [2022-01-31 07:54:03,985 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 417 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:54:03,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 59 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:54:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 07:54:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-01-31 07:54:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 425 states have (on average 1.0141176470588236) internal successors, (431), 426 states have internal predecessors, (431), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:54:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 438 transitions. [2022-01-31 07:54:03,992 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 438 transitions. Word has length 228 [2022-01-31 07:54:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:54:03,993 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 438 transitions. [2022-01-31 07:54:03,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 2.0686274509803924) internal successors, (422), 203 states have internal predecessors, (422), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:54:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 438 transitions. [2022-01-31 07:54:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 07:54:03,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:54:04,000 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:54:04,022 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 07:54:04,215 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 07:54:04,216 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:54:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:54:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash 674004286, now seen corresponding path program 5 times [2022-01-31 07:54:04,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:54:04,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566798715] [2022-01-31 07:54:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:54:04,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:54:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:54:15,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:54:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:54:15,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2022-01-31 07:54:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:54:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40013 backedges. 2 proven. 40000 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 07:54:15,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:54:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566798715] [2022-01-31 07:54:15,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566798715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:54:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060221506] [2022-01-31 07:54:15,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:54:15,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:54:15,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:54:15,444 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 07:54:15,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process