/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/prodbin-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 15:47:09,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 15:47:09,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 15:47:09,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 15:47:09,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 15:47:09,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 15:47:09,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 15:47:09,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 15:47:09,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 15:47:09,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 15:47:09,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 15:47:09,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 15:47:09,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 15:47:09,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 15:47:09,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 15:47:09,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 15:47:09,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 15:47:09,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 15:47:09,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 15:47:09,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 15:47:09,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 15:47:09,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 15:47:09,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 15:47:09,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 15:47:09,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 15:47:09,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 15:47:09,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 15:47:09,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 15:47:09,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 15:47:09,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 15:47:09,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 15:47:09,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 15:47:09,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 15:47:09,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 15:47:09,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 15:47:09,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 15:47:09,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 15:47:09,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 15:47:09,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 15:47:09,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 15:47:09,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 15:47:09,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 15:47:09,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 15:47:09,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 15:47:09,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 15:47:09,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 15:47:09,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 15:47:09,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 15:47:09,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 15:47:09,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 15:47:09,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 15:47:09,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 15:47:09,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 15:47:09,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 15:47:09,301 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 15:47:09,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 15:47:09,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 15:47:09,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 15:47:09,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 15:47:09,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 15:47:09,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:47:09,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 15:47:09,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 15:47:09,303 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 15:47:09,303 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 15:47:09,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 15:47:09,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 15:47:09,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 15:47:09,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 15:47:09,510 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 15:47:09,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-01-31 15:47:09,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de88896ee/7b473a8b71c1464ba0b4cae7aae31cb3/FLAG03177fb6d [2022-01-31 15:47:09,903 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 15:47:09,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-01-31 15:47:09,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de88896ee/7b473a8b71c1464ba0b4cae7aae31cb3/FLAG03177fb6d [2022-01-31 15:47:09,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de88896ee/7b473a8b71c1464ba0b4cae7aae31cb3 [2022-01-31 15:47:09,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 15:47:09,919 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 15:47:09,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 15:47:09,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 15:47:09,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 15:47:09,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:47:09" (1/1) ... [2022-01-31 15:47:09,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f7c4da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:09, skipping insertion in model container [2022-01-31 15:47:09,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:47:09" (1/1) ... [2022-01-31 15:47:09,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 15:47:09,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 15:47:10,097 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/prodbin-ll_valuebound20.c[537,550] [2022-01-31 15:47:10,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:47:10,109 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 15:47:10,116 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/prodbin-ll_valuebound20.c[537,550] [2022-01-31 15:47:10,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:47:10,127 INFO L208 MainTranslator]: Completed translation [2022-01-31 15:47:10,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10 WrapperNode [2022-01-31 15:47:10,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 15:47:10,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 15:47:10,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 15:47:10,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 15:47:10,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 15:47:10,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 15:47:10,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 15:47:10,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 15:47:10,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:47:10,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:47:10,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 15:47:10,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 15:47:10,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 15:47:10,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 15:47:10,200 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 15:47:10,200 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 15:47:10,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 15:47:10,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 15:47:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 15:47:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 15:47:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 15:47:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 15:47:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 15:47:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 15:47:10,240 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 15:47:10,241 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 15:47:10,329 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 15:47:10,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 15:47:10,333 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 15:47:10,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:47:10 BoogieIcfgContainer [2022-01-31 15:47:10,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 15:47:10,335 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 15:47:10,335 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 15:47:10,336 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 15:47:10,338 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:47:10" (1/1) ... [2022-01-31 15:47:10,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:47:10 BasicIcfg [2022-01-31 15:47:10,349 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 15:47:10,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 15:47:10,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 15:47:10,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 15:47:10,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 03:47:09" (1/4) ... [2022-01-31 15:47:10,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c45709d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:47:10, skipping insertion in model container [2022-01-31 15:47:10,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:47:10" (2/4) ... [2022-01-31 15:47:10,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c45709d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:47:10, skipping insertion in model container [2022-01-31 15:47:10,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:47:10" (3/4) ... [2022-01-31 15:47:10,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c45709d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 03:47:10, skipping insertion in model container [2022-01-31 15:47:10,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:47:10" (4/4) ... [2022-01-31 15:47:10,354 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.cJordan [2022-01-31 15:47:10,356 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 15:47:10,357 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 15:47:10,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 15:47:10,386 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 15:47:10,386 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 15:47:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 15:47:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 15:47:10,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:47:10,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:47:10,399 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:47:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:47:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-01-31 15:47:10,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:47:10,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119828583] [2022-01-31 15:47:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:10,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:47:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:10,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:47:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:10,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 15:47:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:10,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 15:47:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:10,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 15:47:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:47:10,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:47:10,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119828583] [2022-01-31 15:47:10,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119828583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:47:10,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:47:10,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 15:47:10,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78454335] [2022-01-31 15:47:10,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:47:10,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 15:47:10,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:47:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 15:47:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:47:10,552 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:47:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:47:10,589 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-31 15:47:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 15:47:10,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-01-31 15:47:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:47:10,601 INFO L225 Difference]: With dead ends: 32 [2022-01-31 15:47:10,601 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 15:47:10,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:47:10,604 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:47:10,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:47:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 15:47:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 15:47:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 15:47:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 15:47:10,634 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-01-31 15:47:10,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:47:10,634 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 15:47:10,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:47:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 15:47:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 15:47:10,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:47:10,635 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:47:10,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 15:47:10,636 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:47:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:47:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-01-31 15:47:10,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:47:10,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768080831] [2022-01-31 15:47:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:10,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:47:10,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:47:10,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984248443] [2022-01-31 15:47:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:10,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:47:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:47:10,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:47:10,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 15:47:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:10,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 15:47:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:47:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:47:10,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:47:10,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:47:10,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768080831] [2022-01-31 15:47:10,881 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:47:10,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984248443] [2022-01-31 15:47:10,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984248443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:47:10,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:47:10,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:47:10,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084109296] [2022-01-31 15:47:10,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:47:10,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:47:10,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:47:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:47:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:47:10,884 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 15:47:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:47:10,930 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-01-31 15:47:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:47:10,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-01-31 15:47:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:47:10,932 INFO L225 Difference]: With dead ends: 37 [2022-01-31 15:47:10,932 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 15:47:10,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:47:10,933 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:47:10,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:47:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 15:47:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-01-31 15:47:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 15:47:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 15:47:10,939 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-01-31 15:47:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:47:10,940 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 15:47:10,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 15:47:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 15:47:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 15:47:10,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:47:10,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:47:10,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 15:47:11,141 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 [2022-01-31 15:47:11,142 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:47:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:47:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-01-31 15:47:11,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:47:11,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389335069] [2022-01-31 15:47:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:11,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:47:11,166 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:47:11,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879170838] [2022-01-31 15:47:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:11,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:47:11,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:47:11,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:47:11,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 15:47:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 15:47:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:47:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 15:47:11,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:47:11,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:47:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389335069] [2022-01-31 15:47:11,389 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:47:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879170838] [2022-01-31 15:47:11,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879170838] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:47:11,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:47:11,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 15:47:11,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587682073] [2022-01-31 15:47:11,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:47:11,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:47:11,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:47:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:47:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:47:11,393 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:47:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:47:11,449 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-31 15:47:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 15:47:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-01-31 15:47:11,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:47:11,452 INFO L225 Difference]: With dead ends: 36 [2022-01-31 15:47:11,452 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 15:47:11,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 15:47:11,456 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:47:11,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:47:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 15:47:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-01-31 15:47:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 15:47:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-01-31 15:47:11,470 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-01-31 15:47:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:47:11,471 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-01-31 15:47:11,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:47:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-01-31 15:47:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 15:47:11,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:47:11,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:47:11,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 15:47:11,693 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 [2022-01-31 15:47:11,693 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:47:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:47:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-01-31 15:47:11,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:47:11,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079739309] [2022-01-31 15:47:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:11,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:47:11,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:47:11,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446830459] [2022-01-31 15:47:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:11,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:47:11,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:47:11,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:47:11,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 15:47:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 15:47:11,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:47:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:47:12,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:47:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:47:23,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:47:23,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079739309] [2022-01-31 15:47:23,315 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:47:23,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446830459] [2022-01-31 15:47:23,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446830459] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 15:47:23,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:47:23,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2022-01-31 15:47:23,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868892125] [2022-01-31 15:47:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:47:23,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 15:47:23,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:47:23,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 15:47:23,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-31 15:47:23,317 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:47:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:47:23,804 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-01-31 15:47:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:47:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-01-31 15:47:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:47:23,805 INFO L225 Difference]: With dead ends: 45 [2022-01-31 15:47:23,805 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 15:47:23,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-31 15:47:23,806 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 15:47:23,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 15:47:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 15:47:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-01-31 15:47:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 15:47:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-01-31 15:47:23,810 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 37 [2022-01-31 15:47:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:47:23,810 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-01-31 15:47:23,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:47:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-01-31 15:47:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 15:47:23,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:47:23,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:47:23,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 15:47:24,019 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 [2022-01-31 15:47:24,020 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:47:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:47:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-01-31 15:47:24,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:47:24,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260515077] [2022-01-31 15:47:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:24,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:47:24,035 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:47:24,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107344391] [2022-01-31 15:47:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:24,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:47:24,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:47:24,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:47:24,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 15:47:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:24,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 15:47:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:47:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 15:47:25,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:47:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 15:47:25,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:47:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260515077] [2022-01-31 15:47:25,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:47:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107344391] [2022-01-31 15:47:25,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107344391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:47:25,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:47:25,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-01-31 15:47:25,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778406727] [2022-01-31 15:47:25,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:47:25,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 15:47:25,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:47:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 15:47:25,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-31 15:47:25,793 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 15:47:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:47:26,678 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-01-31 15:47:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 15:47:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-01-31 15:47:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:47:26,686 INFO L225 Difference]: With dead ends: 61 [2022-01-31 15:47:26,686 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 15:47:26,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-31 15:47:26,687 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 15:47:26,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 148 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 15:47:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 15:47:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 15:47:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 15:47:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-01-31 15:47:26,692 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 37 [2022-01-31 15:47:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:47:26,692 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-01-31 15:47:26,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 15:47:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-01-31 15:47:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 15:47:26,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:47:26,693 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:47:26,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 15:47:26,935 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 [2022-01-31 15:47:26,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:47:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:47:26,936 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-01-31 15:47:26,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:47:26,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476897601] [2022-01-31 15:47:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:26,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:47:26,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:47:26,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936830208] [2022-01-31 15:47:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:26,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:47:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:47:26,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:47:26,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 15:47:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:27,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 15:47:27,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:47:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 15:47:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:47:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 15:47:27,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:47:27,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476897601] [2022-01-31 15:47:27,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:47:27,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936830208] [2022-01-31 15:47:27,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936830208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:47:27,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:47:27,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-31 15:47:27,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33897138] [2022-01-31 15:47:27,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:47:27,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 15:47:27,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:47:27,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 15:47:27,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:47:27,925 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 15:47:29,932 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 [] [2022-01-31 15:47:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:47:30,008 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-01-31 15:47:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 15:47:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-01-31 15:47:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:47:30,009 INFO L225 Difference]: With dead ends: 66 [2022-01-31 15:47:30,009 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 15:47:30,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 15:47:30,010 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:47:30,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 93 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 15:47:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 15:47:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 15:47:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 15:47:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-01-31 15:47:30,015 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 43 [2022-01-31 15:47:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:47:30,015 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-01-31 15:47:30,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 15:47:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-01-31 15:47:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 15:47:30,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:47:30,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:47:30,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 15:47:30,231 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 [2022-01-31 15:47:30,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:47:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:47:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1353204359, now seen corresponding path program 1 times [2022-01-31 15:47:30,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:47:30,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581590161] [2022-01-31 15:47:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:30,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:47:30,242 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:47:30,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095994279] [2022-01-31 15:47:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:30,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:47:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:47:30,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:47:30,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 15:47:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:47:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 15:47:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:47:30,636 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:47:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 15:47:31,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:47:38,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:47:38,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581590161] [2022-01-31 15:47:38,752 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:47:38,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095994279] [2022-01-31 15:47:38,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095994279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 15:47:38,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:47:38,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-01-31 15:47:38,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064030601] [2022-01-31 15:47:38,753 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 15:47:38,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 15:47:38,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:47:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 15:47:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=249, Unknown=2, NotChecked=0, Total=306 [2022-01-31 15:47:38,754 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 15:47:41,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:47:43,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:47:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:47:43,577 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-01-31 15:47:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 15:47:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-01-31 15:47:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:47:43,579 INFO L225 Difference]: With dead ends: 86 [2022-01-31 15:47:43,579 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 15:47:43,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=66, Invalid=312, Unknown=2, NotChecked=0, Total=380 [2022-01-31 15:47:43,580 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-31 15:47:43,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 217 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 182 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-01-31 15:47:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 15:47:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-01-31 15:47:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 15:47:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-01-31 15:47:43,585 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 46 [2022-01-31 15:47:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:47:43,585 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-01-31 15:47:43,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 15:47:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-01-31 15:47:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 15:47:43,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:47:43,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:47:43,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 15:47:43,804 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 [2022-01-31 15:47:43,805 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:47:43,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:47:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 2 times [2022-01-31 15:47:43,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:47:43,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881125992] [2022-01-31 15:47:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:47:43,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:47:43,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:47:43,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132647723] [2022-01-31 15:47:43,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 15:47:43,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:47:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:47:43,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:47:43,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 15:47:43,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 15:47:43,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:47:43,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 15:47:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:47:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 15:47:49,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:48:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 15:48:10,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:48:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881125992] [2022-01-31 15:48:10,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:48:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132647723] [2022-01-31 15:48:10,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132647723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:48:10,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:48:10,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2022-01-31 15:48:10,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657563470] [2022-01-31 15:48:10,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:48:10,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 15:48:10,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:48:10,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 15:48:10,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=338, Unknown=7, NotChecked=0, Total=420 [2022-01-31 15:48:10,205 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 15:48:12,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:48:15,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:48:26,610 WARN L228 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 49 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 15:48:37,202 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 [] [2022-01-31 15:48:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:48:45,580 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-01-31 15:48:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 15:48:45,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2022-01-31 15:48:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:48:45,584 INFO L225 Difference]: With dead ends: 105 [2022-01-31 15:48:45,584 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 15:48:45,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=177, Invalid=806, Unknown=9, NotChecked=0, Total=992 [2022-01-31 15:48:45,585 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-01-31 15:48:45,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 275 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 356 Invalid, 2 Unknown, 22 Unchecked, 10.5s Time] [2022-01-31 15:48:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 15:48:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2022-01-31 15:48:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 15:48:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-01-31 15:48:45,599 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2022-01-31 15:48:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:48:45,599 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-01-31 15:48:45,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 15:48:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-01-31 15:48:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 15:48:45,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:48:45,600 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:48:45,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 15:48:45,819 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 [2022-01-31 15:48:45,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:48:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:48:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2101955993, now seen corresponding path program 3 times [2022-01-31 15:48:45,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:48:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883282497] [2022-01-31 15:48:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:48:45,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:48:45,830 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:48:45,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638932911] [2022-01-31 15:48:45,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 15:48:45,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:48:45,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:48:45,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:48:45,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 15:48:45,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 15:48:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:48:45,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 15:48:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:48:47,199 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:48:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 15:48:50,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:48:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 15:48:56,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:48:56,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883282497] [2022-01-31 15:48:56,362 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:48:56,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638932911] [2022-01-31 15:48:56,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638932911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:48:56,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:48:56,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 33 [2022-01-31 15:48:56,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562682637] [2022-01-31 15:48:56,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:48:56,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 15:48:56,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:48:56,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 15:48:56,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=851, Unknown=3, NotChecked=0, Total=1056 [2022-01-31 15:48:56,367 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-01-31 15:49:00,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:49:06,964 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 [] [2022-01-31 15:49:12,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:49:12,114 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2022-01-31 15:49:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 15:49:12,115 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 64 [2022-01-31 15:49:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:49:12,115 INFO L225 Difference]: With dead ends: 115 [2022-01-31 15:49:12,115 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 15:49:12,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=520, Invalid=2128, Unknown=4, NotChecked=0, Total=2652 [2022-01-31 15:49:12,116 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-31 15:49:12,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 284 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 276 Invalid, 1 Unknown, 35 Unchecked, 6.4s Time] [2022-01-31 15:49:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 15:49:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 15:49:12,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 15:49:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 15:49:12,117 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2022-01-31 15:49:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:49:12,117 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 15:49:12,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-01-31 15:49:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 15:49:12,117 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 15:49:12,120 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 15:49:12,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 15:49:12,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 15:49:12,342 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-01-31 15:49:12,342 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 15:49:12,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 03:49:12 BasicIcfg [2022-01-31 15:49:12,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 15:49:12,346 INFO L158 Benchmark]: Toolchain (without parser) took 122426.28ms. Allocated memory was 207.6MB in the beginning and 263.2MB in the end (delta: 55.6MB). Free memory was 155.9MB in the beginning and 126.4MB in the end (delta: 29.5MB). Peak memory consumption was 86.2MB. Max. memory is 8.0GB. [2022-01-31 15:49:12,346 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 207.6MB. Free memory is still 172.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 15:49:12,346 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.85ms. Allocated memory is still 207.6MB. Free memory was 155.8MB in the beginning and 182.4MB in the end (delta: -26.7MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-01-31 15:49:12,346 INFO L158 Benchmark]: Boogie Preprocessor took 17.28ms. Allocated memory is still 207.6MB. Free memory was 182.4MB in the beginning and 181.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 15:49:12,346 INFO L158 Benchmark]: RCFGBuilder took 188.23ms. Allocated memory is still 207.6MB. Free memory was 180.8MB in the beginning and 170.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 15:49:12,347 INFO L158 Benchmark]: IcfgTransformer took 14.18ms. Allocated memory is still 207.6MB. Free memory was 170.6MB in the beginning and 169.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 15:49:12,348 INFO L158 Benchmark]: TraceAbstraction took 121995.07ms. Allocated memory was 207.6MB in the beginning and 263.2MB in the end (delta: 55.6MB). Free memory was 168.8MB in the beginning and 126.4MB in the end (delta: 42.4MB). Peak memory consumption was 98.8MB. Max. memory is 8.0GB. [2022-01-31 15:49:12,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 207.6MB. Free memory is still 172.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.85ms. Allocated memory is still 207.6MB. Free memory was 155.8MB in the beginning and 182.4MB in the end (delta: -26.7MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.28ms. Allocated memory is still 207.6MB. Free memory was 182.4MB in the beginning and 181.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 188.23ms. Allocated memory is still 207.6MB. Free memory was 180.8MB in the beginning and 170.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.18ms. Allocated memory is still 207.6MB. Free memory was 170.6MB in the beginning and 169.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 121995.07ms. Allocated memory was 207.6MB in the beginning and 263.2MB in the end (delta: 55.6MB). Free memory was 168.8MB in the beginning and 126.4MB in the end (delta: 42.4MB). Peak memory consumption was 98.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 122.0s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 59.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 230 SdHoareTripleChecker+Valid, 24.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 217 mSDsluCounter, 1356 SdHoareTripleChecker+Invalid, 24.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 57 IncrementalHoareTripleChecker+Unchecked, 1130 mSDsCounter, 137 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1211 IncrementalHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 137 mSolverCounterUnsat, 226 mSDtfsCounter, 1211 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 646 GetRequests, 479 SyntacticMatches, 13 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 78.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=8, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 40 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 59.7s InterpolantComputationTime, 372 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 594 ConstructedInterpolants, 4 QuantifiedInterpolants, 3913 SizeOfPredicates, 29 NumberOfNonLiveVariables, 964 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 326/443 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 15:49:12,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...