/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/nla-digbench-scaling/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:00:45,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:00:45,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:00:46,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:00:46,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:00:46,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:00:46,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:00:46,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:00:46,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:00:46,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:00:46,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:00:46,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:00:46,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:00:46,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:00:46,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:00:46,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:00:46,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:00:46,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:00:46,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:00:46,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:00:46,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:00:46,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:00:46,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:00:46,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:00:46,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-14 22:00:46,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-14 22:00:46,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-14 22:00:46,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-14 22:00:46,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-14 22:00:46,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-14 22:00:46,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 22:00:46,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 22:00:46,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 22:00:46,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 22:00:46,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 22:00:46,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 22:00:46,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 22:00:46,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 22:00:46,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:00:46,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:00:46,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:00:46,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:00:46,122 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:00:46,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:00:46,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:00:46,124 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:00:46,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:00:46,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:00:46,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:00:46,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:00:46,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:00:46,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:00:46,126 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:00:46,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:00:46,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:00:46,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:00:46,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:00:46,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:00:46,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:00:46,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:00:46,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:00:46,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:00:46,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:00:46,128 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:00:46,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:00:46,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:00:46,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:00:46,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:00:46,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:00:46,412 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:00:46,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-02-14 22:00:46,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe750b87/a66d189099a44584ae5600eee5efe746/FLAGd99adfdeb [2022-02-14 22:00:46,822 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:00:46,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-02-14 22:00:46,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe750b87/a66d189099a44584ae5600eee5efe746/FLAGd99adfdeb [2022-02-14 22:00:46,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe750b87/a66d189099a44584ae5600eee5efe746 [2022-02-14 22:00:46,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:00:46,858 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:00:46,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:00:46,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:00:46,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:00:46,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:00:46" (1/1) ... [2022-02-14 22:00:46,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158af652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:46, skipping insertion in model container [2022-02-14 22:00:46,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:00:46" (1/1) ... [2022-02-14 22:00:46,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:00:46,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:00:47,090 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2022-02-14 22:00:47,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:00:47,117 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:00:47,128 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2022-02-14 22:00:47,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:00:47,160 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:00:47,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47 WrapperNode [2022-02-14 22:00:47,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:00:47,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:00:47,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:00:47,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:00:47,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:00:47,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:00:47,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:00:47,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:00:47,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:00:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:00:47,211 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) [2022-02-14 22:00:47,234 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 [2022-02-14 22:00:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:00:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:00:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:00:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:00:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:00:47,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:00:47,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:00:47,255 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:00:47,256 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:00:47,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:00:47,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 22:00:47,256 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:00:47,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:00:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:00:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:00:47,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:00:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:00:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:00:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:00:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:00:47,319 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:00:47,320 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:00:47,485 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:00:47,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:00:47,490 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 22:00:47,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:00:47 BoogieIcfgContainer [2022-02-14 22:00:47,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:00:47,492 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:00:47,492 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:00:47,493 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:00:47,496 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:00:47" (1/1) ... [2022-02-14 22:00:47,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:00:47 BasicIcfg [2022-02-14 22:00:47,517 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:00:47,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:00:47,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:00:47,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:00:47,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:00:46" (1/4) ... [2022-02-14 22:00:47,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5692ef50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:00:47, skipping insertion in model container [2022-02-14 22:00:47,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:00:47" (2/4) ... [2022-02-14 22:00:47,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5692ef50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:00:47, skipping insertion in model container [2022-02-14 22:00:47,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:00:47" (3/4) ... [2022-02-14 22:00:47,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5692ef50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:00:47, skipping insertion in model container [2022-02-14 22:00:47,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:00:47" (4/4) ... [2022-02-14 22:00:47,547 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.cJordan [2022-02-14 22:00:47,551 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:00:47,551 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:00:47,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:00:47,640 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 22:00:47,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:00:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 22:00:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 22:00:47,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:00:47,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:00:47,657 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:00:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:00:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2022-02-14 22:00:47,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:00:47,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990399631] [2022-02-14 22:00:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:47,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:00:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:00:47,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:00:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:00:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:00:47,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:00:47,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990399631] [2022-02-14 22:00:47,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990399631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:00:47,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:00:47,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:00:47,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873348398] [2022-02-14 22:00:47,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:00:47,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:00:47,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:00:47,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:00:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:00:47,859 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-02-14 22:00:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:00:47,900 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-02-14 22:00:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:00:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-02-14 22:00:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:00:47,909 INFO L225 Difference]: With dead ends: 26 [2022-02-14 22:00:47,909 INFO L226 Difference]: Without dead ends: 21 [2022-02-14 22:00:47,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:00:47,914 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:00:47,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:00:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-14 22:00:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-02-14 22:00:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 22:00:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-14 22:00:47,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-02-14 22:00:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:00:47,940 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-14 22:00:47,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-02-14 22:00:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-14 22:00:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 22:00:47,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:00:47,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:00:47,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:00:47,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:00:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:00:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2022-02-14 22:00:47,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:00:47,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451464336] [2022-02-14 22:00:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:47,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:00:47,957 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:00:47,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304969022] [2022-02-14 22:00:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:47,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:00:47,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:00:47,959 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) [2022-02-14 22:00:47,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:00:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:00:48,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:00:48,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:00:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:00:48,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:00:48,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:00:48,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451464336] [2022-02-14 22:00:48,187 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:00:48,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304969022] [2022-02-14 22:00:48,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304969022] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:00:48,188 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:00:48,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 22:00:48,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117217407] [2022-02-14 22:00:48,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:00:48,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 22:00:48,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:00:48,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 22:00:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:00:48,191 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 22:00:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:00:48,255 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-02-14 22:00:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:00:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-14 22:00:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:00:48,257 INFO L225 Difference]: With dead ends: 32 [2022-02-14 22:00:48,257 INFO L226 Difference]: Without dead ends: 29 [2022-02-14 22:00:48,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:00:48,258 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:00:48,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:00:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-14 22:00:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-02-14 22:00:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 22:00:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-14 22:00:48,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-02-14 22:00:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:00:48,265 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-14 22:00:48,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 22:00:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-14 22:00:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 22:00:48,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:00:48,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:00:48,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 22:00:48,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:00:48,483 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:00:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:00:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2022-02-14 22:00:48,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:00:48,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123505776] [2022-02-14 22:00:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:48,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:00:48,497 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:00:48,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17310245] [2022-02-14 22:00:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:48,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:00:48,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:00:48,501 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) [2022-02-14 22:00:48,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:00:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:00:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 22:00:48,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:00:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:00:48,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:00:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 22:00:48,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:00:48,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123505776] [2022-02-14 22:00:48,944 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:00:48,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17310245] [2022-02-14 22:00:48,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17310245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:00:48,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:00:48,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-14 22:00:48,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80461489] [2022-02-14 22:00:48,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:00:48,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 22:00:48,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:00:48,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 22:00:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:00:48,947 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 22:00:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:00:49,212 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-02-14 22:00:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 22:00:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-02-14 22:00:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:00:49,214 INFO L225 Difference]: With dead ends: 43 [2022-02-14 22:00:49,214 INFO L226 Difference]: Without dead ends: 38 [2022-02-14 22:00:49,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-14 22:00:49,215 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:00:49,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 121 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:00:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-14 22:00:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-02-14 22:00:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 22:00:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-02-14 22:00:49,221 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-02-14 22:00:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:00:49,222 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-02-14 22:00:49,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 22:00:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-02-14 22:00:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 22:00:49,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:00:49,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:00:49,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 22:00:49,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 22:00:49,444 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:00:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:00:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2022-02-14 22:00:49,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:00:49,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375783817] [2022-02-14 22:00:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:00:49,461 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:00:49,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476443553] [2022-02-14 22:00:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:49,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:00:49,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:00:49,479 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) [2022-02-14 22:00:49,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 22:00:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:00:49,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:00:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:00:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:00:49,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:00:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:00:49,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:00:49,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375783817] [2022-02-14 22:00:49,636 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:00:49,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476443553] [2022-02-14 22:00:49,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476443553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:00:49,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:00:49,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 22:00:49,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828588214] [2022-02-14 22:00:49,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:00:49,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:00:49,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:00:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:00:49,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:00:49,638 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:00:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:00:49,687 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-02-14 22:00:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 22:00:49,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-02-14 22:00:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:00:49,689 INFO L225 Difference]: With dead ends: 71 [2022-02-14 22:00:49,689 INFO L226 Difference]: Without dead ends: 71 [2022-02-14 22:00:49,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:00:49,690 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:00:49,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 119 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:00:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-14 22:00:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-02-14 22:00:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:00:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-02-14 22:00:49,696 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-02-14 22:00:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:00:49,697 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-02-14 22:00:49,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:00:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-02-14 22:00:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 22:00:49,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:00:49,698 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:00:49,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:00:49,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:00:49,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:00:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:00:49,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2022-02-14 22:00:49,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:00:49,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401466302] [2022-02-14 22:00:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:49,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:00:49,917 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:00:49,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36247475] [2022-02-14 22:00:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:49,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:00:49,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:00:49,924 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) [2022-02-14 22:00:49,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 22:00:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:00:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 22:00:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:00:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 22:00:50,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:00:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 22:00:50,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:00:50,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401466302] [2022-02-14 22:00:50,791 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:00:50,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36247475] [2022-02-14 22:00:50,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36247475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:00:50,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:00:50,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-02-14 22:00:50,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362069521] [2022-02-14 22:00:50,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:00:50,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 22:00:50,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:00:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 22:00:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-14 22:00:50,794 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 22:00:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:00:51,370 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-02-14 22:00:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-14 22:00:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-02-14 22:00:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:00:51,372 INFO L225 Difference]: With dead ends: 82 [2022-02-14 22:00:51,372 INFO L226 Difference]: Without dead ends: 76 [2022-02-14 22:00:51,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 22:00:51,373 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:00:51,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 241 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 255 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-02-14 22:00:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-14 22:00:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-02-14 22:00:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 22:00:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-02-14 22:00:51,381 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-02-14 22:00:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:00:51,381 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-02-14 22:00:51,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 22:00:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-02-14 22:00:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-14 22:00:51,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:00:51,382 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:00:51,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:00:51,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:00:51,583 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:00:51,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:00:51,584 INFO L85 PathProgramCache]: Analyzing trace with hash -782335822, now seen corresponding path program 1 times [2022-02-14 22:00:51,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:00:51,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37485313] [2022-02-14 22:00:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:00:51,593 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:00:51,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661256707] [2022-02-14 22:00:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:00:51,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:00:51,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:00:51,597 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) [2022-02-14 22:00:51,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 22:00:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:00:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 22:00:51,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:00:51,794 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:00:51,796 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:00:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-14 22:00:54,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:00:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-14 22:00:54,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:00:54,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37485313] [2022-02-14 22:00:54,714 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:00:54,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661256707] [2022-02-14 22:00:54,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661256707] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:00:54,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:00:54,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-02-14 22:00:54,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452356798] [2022-02-14 22:00:54,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:00:54,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 22:00:54,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:00:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 22:00:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2022-02-14 22:00:54,716 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:00:56,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:01:00,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:01:02,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:01:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:01:05,344 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2022-02-14 22:01:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 22:01:05,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-02-14 22:01:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:01:05,346 INFO L225 Difference]: With dead ends: 94 [2022-02-14 22:01:05,346 INFO L226 Difference]: Without dead ends: 90 [2022-02-14 22:01:05,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=117, Invalid=432, Unknown=3, NotChecked=0, Total=552 [2022-02-14 22:01:05,347 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:01:05,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 153 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 159 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-02-14 22:01:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-14 22:01:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-02-14 22:01:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 22:01:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-02-14 22:01:05,357 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-02-14 22:01:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:01:05,357 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-02-14 22:01:05,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:01:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-02-14 22:01:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-14 22:01:05,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:01:05,359 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:01:05,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 22:01:05,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:01:05,560 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:01:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:01:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1435422131, now seen corresponding path program 1 times [2022-02-14 22:01:05,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:01:05,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775795923] [2022-02-14 22:01:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:01:05,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:01:05,569 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:01:05,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535762721] [2022-02-14 22:01:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:01:05,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:01:05,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:01:05,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:01:05,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 22:01:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:01:05,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:01:05,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:01:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:01:05,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:01:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:01:06,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:01:06,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775795923] [2022-02-14 22:01:06,007 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:01:06,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535762721] [2022-02-14 22:01:06,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535762721] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:01:06,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:01:06,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-14 22:01:06,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603067930] [2022-02-14 22:01:06,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:01:06,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 22:01:06,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:01:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 22:01:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:01:06,011 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 22:01:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:01:06,158 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-02-14 22:01:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 22:01:06,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-02-14 22:01:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:01:06,160 INFO L225 Difference]: With dead ends: 91 [2022-02-14 22:01:06,160 INFO L226 Difference]: Without dead ends: 91 [2022-02-14 22:01:06,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-14 22:01:06,161 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:01:06,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:01:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-14 22:01:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-02-14 22:01:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:01:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-02-14 22:01:06,171 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-02-14 22:01:06,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:01:06,171 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-02-14 22:01:06,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 22:01:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-02-14 22:01:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 22:01:06,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:01:06,175 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:01:06,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 22:01:06,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:01:06,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:01:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:01:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1628716144, now seen corresponding path program 2 times [2022-02-14 22:01:06,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:01:06,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777465670] [2022-02-14 22:01:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:01:06,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:01:06,384 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:01:06,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346092448] [2022-02-14 22:01:06,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:01:06,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:01:06,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:01:06,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:01:06,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 22:01:06,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:01:06,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:01:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:01:06,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:01:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:01:06,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:01:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:01:06,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:01:06,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777465670] [2022-02-14 22:01:06,875 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:01:06,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346092448] [2022-02-14 22:01:06,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346092448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:01:06,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:01:06,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 22:01:06,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391059603] [2022-02-14 22:01:06,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:01:06,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 22:01:06,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:01:06,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 22:01:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:01:06,877 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:01:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:01:07,046 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-02-14 22:01:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 22:01:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-02-14 22:01:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:01:07,048 INFO L225 Difference]: With dead ends: 102 [2022-02-14 22:01:07,048 INFO L226 Difference]: Without dead ends: 102 [2022-02-14 22:01:07,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-14 22:01:07,049 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:01:07,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 179 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:01:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-14 22:01:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-02-14 22:01:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 22:01:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-02-14 22:01:07,056 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-02-14 22:01:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:01:07,057 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-02-14 22:01:07,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:01:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-02-14 22:01:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 22:01:07,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:01:07,062 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:01:07,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 22:01:07,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:01:07,278 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:01:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:01:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1136439088, now seen corresponding path program 3 times [2022-02-14 22:01:07,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:01:07,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332118039] [2022-02-14 22:01:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:01:07,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:01:07,286 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:01:07,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338894950] [2022-02-14 22:01:07,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:01:07,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:01:07,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:01:07,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:01:07,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 22:01:07,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-14 22:01:07,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:01:07,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 22:01:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:01:08,075 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:01:08,083 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:01:08,085 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:01:14,184 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false