/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/loop-acceleration/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:10:48,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:10:48,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:10:48,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 17:10:48,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 17:10:48,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 17:10:48,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 17:10:48,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 17:10:48,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 17:10:48,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 17:10:48,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 17:10:48,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 17:10:48,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:10:48,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:10:48,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:10:48,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:10:48,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:10:48,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:10:48,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:10:48,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:10:48,412 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:10:48,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:10:48,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:10:48,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:10:48,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:10:48,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 17:10:48,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 17:10:48,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 17:10:48,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 17:10:48,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 17:10:48,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 17:10:48,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 17:10:48,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 17:10:48,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 17:10:48,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 17:10:48,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 17:10:48,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 17:10:48,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 17:10:48,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 17:10:48,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:10:48,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:10:48,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:10:48,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:10:48,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:10:48,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:10:48,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:10:48,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:10:48,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:10:48,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:10:48,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:10:48,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:10:48,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:10:48,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:10:48,441 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:10:48,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:10:48,441 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:10:48,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:10:48,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:10:48,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:10:48,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:10:48,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:10:48,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:10:48,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:10:48,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:10:48,442 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:10:48,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:10:48,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:10:48,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:10:48,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:10:48,659 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:10:48,660 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:10:48,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-03-18 17:10:48,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8d19a16/9f81ef310b8a4edc86ea4a712d05cfa3/FLAG6639628f7 [2022-03-18 17:10:48,994 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:10:48,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-03-18 17:10:48,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8d19a16/9f81ef310b8a4edc86ea4a712d05cfa3/FLAG6639628f7 [2022-03-18 17:10:49,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8d19a16/9f81ef310b8a4edc86ea4a712d05cfa3 [2022-03-18 17:10:49,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:10:49,436 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:10:49,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:10:49,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:10:49,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:10:49,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217531f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49, skipping insertion in model container [2022-03-18 17:10:49,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:10:49,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:10:49,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-03-18 17:10:49,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:10:49,584 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:10:49,592 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-03-18 17:10:49,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:10:49,606 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:10:49,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49 WrapperNode [2022-03-18 17:10:49,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:10:49,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:10:49,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:10:49,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:10:49,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:10:49,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:10:49,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:10:49,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:10:49,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:10:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:10:49,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 17:10:49,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 17:10:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:10:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:10:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:10:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:10:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-03-18 17:10:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:10:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:10:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:10:49,775 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:10:49,776 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:10:49,842 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:10:49,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:10:49,847 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 17:10:49,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:10:49 BoogieIcfgContainer [2022-03-18 17:10:49,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:10:49,848 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:10:49,848 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:10:49,855 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:10:49,857 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:10:49" (1/1) ... [2022-03-18 17:10:49,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:10:49 BasicIcfg [2022-03-18 17:10:49,867 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:10:49,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:10:49,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:10:49,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:10:49,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:10:49" (1/4) ... [2022-03-18 17:10:49,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625459ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:10:49, skipping insertion in model container [2022-03-18 17:10:49,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:10:49" (2/4) ... [2022-03-18 17:10:49,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625459ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:10:49, skipping insertion in model container [2022-03-18 17:10:49,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:10:49" (3/4) ... [2022-03-18 17:10:49,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625459ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:10:49, skipping insertion in model container [2022-03-18 17:10:49,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:10:49" (4/4) ... [2022-03-18 17:10:49,878 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.cJordan [2022-03-18 17:10:49,883 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:10:49,884 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:10:49,915 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:10:49,920 INFO L340 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 [2022-03-18 17:10:49,920 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:10:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 17:10:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 17:10:49,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:10:49,947 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:10:49,948 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:10:49,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:10:49,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1565505021, now seen corresponding path program 1 times [2022-03-18 17:10:49,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:10:49,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611567728] [2022-03-18 17:10:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:10:49,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:10:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:50,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:10:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:10:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:10:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611567728] [2022-03-18 17:10:50,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611567728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:10:50,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:10:50,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 17:10:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458814306] [2022-03-18 17:10:50,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:10:50,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 17:10:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:10:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 17:10:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:10:50,089 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:10:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:10:50,113 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-03-18 17:10:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 17:10:50,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 17:10:50,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:10:50,119 INFO L225 Difference]: With dead ends: 23 [2022-03-18 17:10:50,119 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 17:10:50,120 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:10:50,122 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:10:50,123 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:10:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 17:10:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 17:10:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:10:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-18 17:10:50,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2022-03-18 17:10:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:10:50,144 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-18 17:10:50,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:10:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-18 17:10:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 17:10:50,144 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:10:50,144 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:10:50,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:10:50,145 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:10:50,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:10:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1564581500, now seen corresponding path program 1 times [2022-03-18 17:10:50,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:10:50,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856888357] [2022-03-18 17:10:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:10:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:10:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:50,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:10:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:10:50,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:10:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856888357] [2022-03-18 17:10:50,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856888357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:10:50,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:10:50,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:10:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932935418] [2022-03-18 17:10:50,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:10:50,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 17:10:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:10:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 17:10:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 17:10:50,220 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:10:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:10:50,253 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-03-18 17:10:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 17:10:50,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 17:10:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:10:50,255 INFO L225 Difference]: With dead ends: 20 [2022-03-18 17:10:50,255 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 17:10:50,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 17:10:50,257 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:10:50,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:10:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 17:10:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-03-18 17:10:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 17:10:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-18 17:10:50,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-03-18 17:10:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:10:50,263 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-18 17:10:50,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:10:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-18 17:10:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 17:10:50,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:10:50,264 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:10:50,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:10:50,264 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:10:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:10:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1890585047, now seen corresponding path program 1 times [2022-03-18 17:10:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:10:50,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054167993] [2022-03-18 17:10:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:10:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:10:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:50,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:10:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:50,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 17:10:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:10:50,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:10:50,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054167993] [2022-03-18 17:10:50,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054167993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:10:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225120907] [2022-03-18 17:10:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:10:50,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:10:50,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:10:50,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:10:50,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 17:10:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 17:10:50,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:10:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:10:50,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:10:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:10:50,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225120907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:10:50,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:10:50,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-18 17:10:50,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257271041] [2022-03-18 17:10:50,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:10:50,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 17:10:50,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:10:50,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 17:10:50,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-18 17:10:50,684 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 17:10:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:10:50,827 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-03-18 17:10:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 17:10:50,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 17 [2022-03-18 17:10:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:10:50,829 INFO L225 Difference]: With dead ends: 24 [2022-03-18 17:10:50,829 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 17:10:50,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-03-18 17:10:50,837 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:10:50,838 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:10:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 17:10:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-18 17:10:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 17:10:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-18 17:10:50,847 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-03-18 17:10:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:10:50,847 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-18 17:10:50,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 17:10:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-18 17:10:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 17:10:50,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:10:50,849 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:10:50,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 17:10:51,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:10:51,070 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:10:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:10:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1393393715, now seen corresponding path program 2 times [2022-03-18 17:10:51,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:10:51,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309649476] [2022-03-18 17:10:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:10:51,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:10:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:10:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:51,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 17:10:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:51,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:10:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:51,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 17:10:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 17:10:51,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:10:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309649476] [2022-03-18 17:10:51,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309649476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:10:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858449478] [2022-03-18 17:10:51,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:10:51,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:10:51,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:10:51,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:10:51,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 17:10:51,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:10:51,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:10:51,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 17:10:51,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:10:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 17:10:51,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:10:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 17:10:51,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858449478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:10:51,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:10:51,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 22 [2022-03-18 17:10:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777530669] [2022-03-18 17:10:51,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:10:51,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 17:10:51,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:10:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 17:10:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-18 17:10:51,738 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 17:10:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:10:52,196 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-03-18 17:10:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 17:10:52,196 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 29 [2022-03-18 17:10:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:10:52,197 INFO L225 Difference]: With dead ends: 36 [2022-03-18 17:10:52,197 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 17:10:52,198 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 17:10:52,199 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:10:52,199 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 17:10:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 17:10:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-18 17:10:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 17:10:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-03-18 17:10:52,204 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 29 [2022-03-18 17:10:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:10:52,204 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-03-18 17:10:52,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 17:10:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-03-18 17:10:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 17:10:52,205 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:10:52,205 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:10:52,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 17:10:52,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 17:10:52,406 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:10:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:10:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash 638375751, now seen corresponding path program 3 times [2022-03-18 17:10:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:10:52,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049344989] [2022-03-18 17:10:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:10:52,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:10:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:10:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 17:10:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:10:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 17:10:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 17:10:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 17:10:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 17:10:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 17:10:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-18 17:10:52,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:10:52,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049344989] [2022-03-18 17:10:52,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049344989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:10:52,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273354770] [2022-03-18 17:10:52,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:10:52,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:10:52,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:10:52,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:10:52,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 17:10:52,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-18 17:10:52,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:10:52,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 17:10:52,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:10:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-18 17:10:53,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:10:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 17:10:53,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273354770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:10:53,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:10:53,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 42 [2022-03-18 17:10:53,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711371354] [2022-03-18 17:10:53,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:10:53,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 17:10:53,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:10:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 17:10:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 17:10:53,836 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 17:10:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:10:58,224 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-03-18 17:10:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 17:10:58,225 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 53 [2022-03-18 17:10:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:10:58,226 INFO L225 Difference]: With dead ends: 60 [2022-03-18 17:10:58,226 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 17:10:58,228 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=845, Invalid=4267, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 17:10:58,228 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 17:10:58,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 148 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 17:10:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 17:10:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-18 17:10:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 18 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 17:10:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-03-18 17:10:58,235 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 53 [2022-03-18 17:10:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:10:58,235 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-03-18 17:10:58,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 17:10:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-03-18 17:10:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 17:10:58,238 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:10:58,238 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:10:58,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 17:10:58,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:10:58,457 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:10:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:10:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1561497967, now seen corresponding path program 4 times [2022-03-18 17:10:58,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:10:58,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384372194] [2022-03-18 17:10:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:10:58,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:10:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:10:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 17:10:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:10:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 17:10:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 17:10:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 17:10:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 17:10:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 17:10:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 17:10:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 17:10:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 17:10:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 17:10:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 17:10:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 17:10:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 17:10:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 17:10:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:10:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-18 17:10:59,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:10:59,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384372194] [2022-03-18 17:10:59,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384372194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:10:59,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350357526] [2022-03-18 17:10:59,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:10:59,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:10:59,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:10:59,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:10:59,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 17:10:59,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:10:59,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:10:59,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-18 17:10:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:11:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-18 17:11:00,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:11:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-18 17:11:02,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350357526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:11:02,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:11:02,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 48] total 82 [2022-03-18 17:11:02,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510459783] [2022-03-18 17:11:02,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:11:02,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 17:11:02,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:11:02,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 17:11:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=5953, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 17:11:02,345 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 17:13:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:29,502 INFO L93 Difference]: Finished difference Result 108 states and 138 transitions. [2022-03-18 17:13:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 17:13:29,503 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 101 [2022-03-18 17:13:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:29,504 INFO L225 Difference]: With dead ends: 108 [2022-03-18 17:13:29,504 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 17:13:29,507 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 172 SyntacticMatches, 15 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3050 ImplicationChecksByTransitivity, 147.4s TimeCoverageRelationStatistics Valid=3098, Invalid=17490, Unknown=4, NotChecked=0, Total=20592 [2022-03-18 17:13:29,508 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3837 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 3837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:29,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 266 Invalid, 4203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 3837 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 17:13:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 17:13:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-03-18 17:13:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 34 states have call successors, (34), 4 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 17:13:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2022-03-18 17:13:29,526 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 101 [2022-03-18 17:13:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:29,526 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2022-03-18 17:13:29,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 17:13:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2022-03-18 17:13:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-18 17:13:29,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:29,529 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:29,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 17:13:29,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:13:29,748 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1223308735, now seen corresponding path program 5 times [2022-03-18 17:13:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531336049] [2022-03-18 17:13:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 17:13:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:13:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 17:13:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 17:13:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 17:13:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 17:13:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 17:13:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 17:13:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 17:13:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 17:13:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 17:13:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 17:13:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 17:13:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 17:13:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 17:13:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 17:13:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 17:13:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 17:13:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 17:13:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 17:13:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-18 17:13:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-18 17:13:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-18 17:13:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-18 17:13:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-18 17:13:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-18 17:13:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-03-18 17:13:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-03-18 17:13:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-18 17:13:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-03-18 17:13:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-03-18 17:13:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-03-18 17:13:31,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:31,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531336049] [2022-03-18 17:13:31,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531336049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:13:31,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320927665] [2022-03-18 17:13:31,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 17:13:31,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:13:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:13:31,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:13:31,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 17:13:48,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-18 17:13:48,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:13:48,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 313 conjunts are in the unsatisfiable core [2022-03-18 17:13:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:13:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-03-18 17:13:49,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:13:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-03-18 17:13:58,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320927665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:13:58,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:13:58,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 96] total 162 [2022-03-18 17:13:58,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436322082] [2022-03-18 17:13:58,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:13:58,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-03-18 17:13:58,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-03-18 17:13:58,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2401, Invalid=23681, Unknown=0, NotChecked=0, Total=26082 [2022-03-18 17:13:58,150 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 162 states, 162 states have (on average 1.2345679012345678) internal successors, (200), 99 states have internal predecessors, (200), 64 states have call successors, (66), 3 states have call predecessors, (66), 33 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-18 17:16:49,644 WARN L232 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 132 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 17:19:43,249 WARN L232 SmtUtils]: Spent 26.93s on a formula simplification. DAG size of input: 222 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 17:21:06,450 WARN L232 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 128 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 17:24:09,416 WARN L232 SmtUtils]: Spent 24.82s on a formula simplification. DAG size of input: 215 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 17:25:27,274 WARN L833 $PredicateComparison]: unable to prove that (and (< (mod (+ 16 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ c_main_~x~0 24) 4294967296) 268435455) (< (mod (+ 20 c_main_~x~0) 4294967296) 268435455) (= |c_#NULL.base| |c_old(#NULL.base)|) (< (mod (+ 6 c_main_~x~0) 4294967296) 268435455) (< (mod (+ c_main_~x~0 54) 4294967296) 268435455) (< (mod (+ 52 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 50) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 10) 4294967296) 268435455) (< (mod (+ 14 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 52 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 48 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 42 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 38 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 56 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 12) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 38) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 28) 4294967296) 268435455) (< (mod (+ 4 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 20) 4294967296) 268435455) (< (mod (+ 34 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 2 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 24) 4294967296) 268435455) (< (mod (+ 34 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 26) 4294967296) 268435455) (< (mod (+ 46 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod c_main_~x~0 4294967296) 268435455) (< (mod (+ 30 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 18 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 40 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 28 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 32 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 18) 4294967296) 268435455) (< (mod (+ 42 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 2 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 14 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 36) 4294967296) 268435455) (< (mod (+ 32 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 44 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 16 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 4) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 48) 4294967296) 268435455) (< (mod (+ 8 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 30 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 26 c_main_~x~0) 4294967296) 268435455) (< (mod (+ c_main_~x~0 50) 4294967296) 268435455) (< (mod (+ 46 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 10 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 40 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 6 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 12 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 54) 4294967296) 268435455) (< (mod |c_main_#t~ret4| 4294967296) 268435455) (< (mod (+ 44 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 36 c_main_~x~0) 4294967296) 268435455) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< (mod (+ 22 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 8) 4294967296) 268435455) (< (mod (+ 22 c_main_~x~0) 4294967296) 268435455)) is different from false