/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:25:42,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:25:42,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:25:42,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:25:42,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:25:42,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:25:42,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:25:42,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:25:42,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:25:42,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:25:42,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:25:42,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:25:42,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:25:42,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:25:42,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:25:42,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:25:42,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:25:42,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:25:42,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:25:42,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:25:42,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:25:42,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:25:42,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:25:42,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:25:42,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 09:25:42,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 09:25:42,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 09:25:42,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 09:25:42,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 09:25:42,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 09:25:42,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:25:42,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:25:42,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:25:42,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:25:42,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:25:42,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:25:42,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:25:42,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:25:42,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:25:42,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:25:42,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:25:42,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:25:42,413 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:25:42,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:25:42,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:25:42,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:25:42,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:25:42,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:25:42,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:25:42,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:25:42,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:25:42,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:25:42,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:25:42,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:25:42,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:25:42,417 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:25:42,417 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:25:42,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:25:42,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:25:42,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:25:42,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:25:42,635 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:25:42,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c [2022-01-31 09:25:42,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adbb147c4/38d7554540684d368855608871a4ed24/FLAG4894af49a [2022-01-31 09:25:43,028 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:25:43,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c [2022-01-31 09:25:43,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adbb147c4/38d7554540684d368855608871a4ed24/FLAG4894af49a [2022-01-31 09:25:43,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adbb147c4/38d7554540684d368855608871a4ed24 [2022-01-31 09:25:43,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:25:43,045 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:25:43,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:25:43,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:25:43,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:25:43,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a267bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43, skipping insertion in model container [2022-01-31 09:25:43,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:25:43,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:25:43,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c[331,344] [2022-01-31 09:25:43,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:25:43,189 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:25:43,211 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c[331,344] [2022-01-31 09:25:43,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:25:43,225 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:25:43,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43 WrapperNode [2022-01-31 09:25:43,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:25:43,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:25:43,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:25:43,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:25:43,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:25:43,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:25:43,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:25:43,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:25:43,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:25:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:43,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 09:25:43,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 09:25:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:25:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:25:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:25:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:25:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:25:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:25:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:25:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:25:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:25:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:25:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:25:43,352 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:25:43,353 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:25:43,455 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:25:43,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:25:43,460 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:25:43,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:25:43 BoogieIcfgContainer [2022-01-31 09:25:43,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:25:43,462 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:25:43,462 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:25:43,463 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:25:43,465 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:25:43" (1/1) ... [2022-01-31 09:25:43,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:25:43 BasicIcfg [2022-01-31 09:25:43,478 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:25:43,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:25:43,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:25:43,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:25:43,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:25:43" (1/4) ... [2022-01-31 09:25:43,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef42213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:25:43, skipping insertion in model container [2022-01-31 09:25:43,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:25:43" (2/4) ... [2022-01-31 09:25:43,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef42213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:25:43, skipping insertion in model container [2022-01-31 09:25:43,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:25:43" (3/4) ... [2022-01-31 09:25:43,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef42213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:25:43, skipping insertion in model container [2022-01-31 09:25:43,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:25:43" (4/4) ... [2022-01-31 09:25:43,483 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_5.cJordan [2022-01-31 09:25:43,487 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:25:43,487 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:25:43,518 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:25:43,525 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:25:43,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:25:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:25:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:25:43,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:43,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:43,552 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:43,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1836216133, now seen corresponding path program 1 times [2022-01-31 09:25:43,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:43,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026770540] [2022-01-31 09:25:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:43,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:43,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:43,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657452194] [2022-01-31 09:25:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:43,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:43,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:43,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:25:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:25:43,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-31 09:25:43,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:25:43,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:25:43,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026770540] [2022-01-31 09:25:43,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657452194] [2022-01-31 09:25:43,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657452194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:25:43,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:25:43,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-31 09:25:43,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364475792] [2022-01-31 09:25:43,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:25:43,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-31 09:25:43,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-31 09:25:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 09:25:43,771 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:25:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:43,780 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-31 09:25:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-31 09:25:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 09:25:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:43,795 INFO L225 Difference]: With dead ends: 33 [2022-01-31 09:25:43,795 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 09:25:43,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 09:25:43,798 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:43,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:25:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 09:25:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 09:25:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:25:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 09:25:43,831 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-31 09:25:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:43,831 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 09:25:43,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:25:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 09:25:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:25:43,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:43,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:43,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:25:44,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-31 09:25:44,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash 35676921, now seen corresponding path program 1 times [2022-01-31 09:25:44,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:44,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580252045] [2022-01-31 09:25:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:44,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:44,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:44,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515200806] [2022-01-31 09:25:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:44,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:44,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:44,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:25:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:25:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:25:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:25:44,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:25:44,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:44,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580252045] [2022-01-31 09:25:44,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:44,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515200806] [2022-01-31 09:25:44,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515200806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:25:44,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:25:44,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:25:44,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501461589] [2022-01-31 09:25:44,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:25:44,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:25:44,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:25:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:25:44,217 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:25:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:44,258 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-01-31 09:25:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:25:44,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-31 09:25:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:44,261 INFO L225 Difference]: With dead ends: 37 [2022-01-31 09:25:44,261 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 09:25:44,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:25:44,262 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:44,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:25:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 09:25:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-31 09:25:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:25:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 09:25:44,271 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-31 09:25:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:44,272 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 09:25:44,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:25:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 09:25:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 09:25:44,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:44,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:44,292 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 09:25:44,490 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,SelfDestructingSolverStorable1 [2022-01-31 09:25:44,491 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash -168804664, now seen corresponding path program 1 times [2022-01-31 09:25:44,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:44,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585843792] [2022-01-31 09:25:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:44,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:44,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:44,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623095687] [2022-01-31 09:25:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:44,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:44,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:44,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:44,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:25:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:25:44,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:25:44,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:25:44,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:25:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:25:44,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585843792] [2022-01-31 09:25:44,748 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623095687] [2022-01-31 09:25:44,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623095687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:25:44,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:25:44,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 09:25:44,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551028804] [2022-01-31 09:25:44,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:25:44,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:25:44,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:25:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:25:44,750 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:25:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:44,866 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-01-31 09:25:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:25:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-01-31 09:25:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:44,867 INFO L225 Difference]: With dead ends: 57 [2022-01-31 09:25:44,867 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 09:25:44,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-31 09:25:44,868 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:44,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 66 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:25:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 09:25:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2022-01-31 09:25:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:25:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-31 09:25:44,873 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-01-31 09:25:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:44,873 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-31 09:25:44,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:25:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-31 09:25:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 09:25:44,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:44,874 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:44,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:25:45,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:45,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash -760694183, now seen corresponding path program 1 times [2022-01-31 09:25:45,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:45,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716137216] [2022-01-31 09:25:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:45,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:45,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553101327] [2022-01-31 09:25:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:45,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:45,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:45,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:45,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:25:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:25:45,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:25:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:25:45,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:25:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:25:45,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716137216] [2022-01-31 09:25:45,440 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553101327] [2022-01-31 09:25:45,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553101327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:25:45,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:25:45,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 09:25:45,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443673031] [2022-01-31 09:25:45,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:25:45,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:25:45,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:25:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:25:45,442 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:25:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:45,676 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2022-01-31 09:25:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:25:45,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-01-31 09:25:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:45,677 INFO L225 Difference]: With dead ends: 111 [2022-01-31 09:25:45,678 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 09:25:45,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:25:45,678 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:45,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 100 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:25:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 09:25:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2022-01-31 09:25:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:25:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-01-31 09:25:45,685 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-01-31 09:25:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:45,685 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-01-31 09:25:45,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:25:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-01-31 09:25:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:25:45,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:45,687 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:45,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:25:45,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:45,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:45,905 INFO L85 PathProgramCache]: Analyzing trace with hash 961270586, now seen corresponding path program 2 times [2022-01-31 09:25:45,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:45,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085410175] [2022-01-31 09:25:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:45,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:45,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:45,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545499530] [2022-01-31 09:25:45,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:25:45,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:45,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:45,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:45,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:25:46,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 09:25:46,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:25:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 09:25:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-01-31 09:25:46,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:25:46,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:46,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085410175] [2022-01-31 09:25:46,346 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:46,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545499530] [2022-01-31 09:25:46,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545499530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:25:46,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:25:46,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 09:25:46,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752659403] [2022-01-31 09:25:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:25:46,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 09:25:46,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 09:25:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:25:46,348 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:25:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:46,415 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-01-31 09:25:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:25:46,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-01-31 09:25:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:46,416 INFO L225 Difference]: With dead ends: 86 [2022-01-31 09:25:46,416 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 09:25:46,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:25:46,417 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:46,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 100 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:25:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 09:25:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-31 09:25:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:25:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-01-31 09:25:46,424 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 70 [2022-01-31 09:25:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:46,425 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-01-31 09:25:46,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:25:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-01-31 09:25:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 09:25:46,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:46,429 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:46,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:25:46,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:46,630 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash 265270041, now seen corresponding path program 1 times [2022-01-31 09:25:46,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:46,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699389426] [2022-01-31 09:25:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:46,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:46,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:46,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826539206] [2022-01-31 09:25:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:46,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:46,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:46,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:46,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:25:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:25:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:25:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:25:46,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:25:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:25:47,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699389426] [2022-01-31 09:25:47,239 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826539206] [2022-01-31 09:25:47,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826539206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:25:47,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:25:47,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 09:25:47,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444465428] [2022-01-31 09:25:47,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:25:47,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:25:47,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:25:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:25:47,241 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:25:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:47,770 INFO L93 Difference]: Finished difference Result 393 states and 553 transitions. [2022-01-31 09:25:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:25:47,771 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-31 09:25:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:47,773 INFO L225 Difference]: With dead ends: 393 [2022-01-31 09:25:47,773 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 09:25:47,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:25:47,774 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 674 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:47,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 167 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:25:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 09:25:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 146. [2022-01-31 09:25:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:25:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-01-31 09:25:47,818 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 78 [2022-01-31 09:25:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:47,818 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-01-31 09:25:47,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:25:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-01-31 09:25:47,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 09:25:47,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:47,819 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:47,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:25:48,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:48,030 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash 195391865, now seen corresponding path program 2 times [2022-01-31 09:25:48,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:48,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146482283] [2022-01-31 09:25:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:48,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:48,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:48,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946285073] [2022-01-31 09:25:48,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:25:48,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:48,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:48,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:25:48,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:25:48,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:25:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:25:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:25:48,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:25:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:25:49,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:49,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146482283] [2022-01-31 09:25:49,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:49,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946285073] [2022-01-31 09:25:49,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946285073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:25:49,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:25:49,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 09:25:49,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101360315] [2022-01-31 09:25:49,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:25:49,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:25:49,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:25:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:25:49,523 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:25:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:51,087 INFO L93 Difference]: Finished difference Result 801 states and 1141 transitions. [2022-01-31 09:25:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 09:25:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2022-01-31 09:25:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:51,093 INFO L225 Difference]: With dead ends: 801 [2022-01-31 09:25:51,093 INFO L226 Difference]: Without dead ends: 801 [2022-01-31 09:25:51,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 09:25:51,095 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1227 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:51,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 224 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 09:25:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-31 09:25:51,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 266. [2022-01-31 09:25:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:25:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2022-01-31 09:25:51,131 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 138 [2022-01-31 09:25:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:51,132 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2022-01-31 09:25:51,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:25:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2022-01-31 09:25:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 09:25:51,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:51,139 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:51,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 09:25:51,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:51,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash -771955143, now seen corresponding path program 3 times [2022-01-31 09:25:51,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335689667] [2022-01-31 09:25:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:51,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:51,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:51,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365676096] [2022-01-31 09:25:51,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:25:51,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:51,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:51,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:51,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:25:51,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 09:25:51,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:25:51,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:25:51,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 09:25:57,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:26:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 09:26:28,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:26:28,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335689667] [2022-01-31 09:26:28,245 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:26:28,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365676096] [2022-01-31 09:26:28,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365676096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:26:28,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:26:28,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2022-01-31 09:26:28,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694071418] [2022-01-31 09:26:28,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:26:28,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 09:26:28,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:26:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 09:26:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=200, Unknown=11, NotChecked=0, Total=272 [2022-01-31 09:26:28,247 INFO L87 Difference]: Start difference. First operand 266 states and 340 transitions. Second operand has 17 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:26:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:26:28,757 INFO L93 Difference]: Finished difference Result 283 states and 363 transitions. [2022-01-31 09:26:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:26:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 258 [2022-01-31 09:26:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:26:28,760 INFO L225 Difference]: With dead ends: 283 [2022-01-31 09:26:28,761 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 09:26:28,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 499 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=121, Invalid=374, Unknown=11, NotChecked=0, Total=506 [2022-01-31 09:26:28,761 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:26:28,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 165 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 169 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-01-31 09:26:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 09:26:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-01-31 09:26:28,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 267 states have (on average 1.2883895131086143) internal successors, (344), 268 states have internal predecessors, (344), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:26:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 363 transitions. [2022-01-31 09:26:28,778 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 363 transitions. Word has length 258 [2022-01-31 09:26:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:26:28,779 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 363 transitions. [2022-01-31 09:26:28,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:26:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 363 transitions. [2022-01-31 09:26:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 09:26:28,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:26:28,781 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:26:28,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 09:26:28,985 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,SelfDestructingSolverStorable7 [2022-01-31 09:26:28,985 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:26:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:26:28,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1258893387, now seen corresponding path program 4 times [2022-01-31 09:26:28,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:26:28,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116097766] [2022-01-31 09:26:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:26:28,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:26:29,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:26:29,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547688029] [2022-01-31 09:26:29,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:26:29,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:26:29,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:26:29,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:26:29,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:26:29,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:26:29,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:26:29,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:26:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:26:29,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-31 09:26:29,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:26:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 399 proven. 4 refuted. 0 times theorem prover too weak. 4923 trivial. 0 not checked. [2022-01-31 09:26:29,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:26:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 409 proven. 4 refuted. 0 times theorem prover too weak. 4913 trivial. 0 not checked. [2022-01-31 09:26:29,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:26:29,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116097766] [2022-01-31 09:26:29,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:26:29,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547688029] [2022-01-31 09:26:29,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547688029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:26:29,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:26:29,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 09:26:29,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548422484] [2022-01-31 09:26:29,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:26:29,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 09:26:29,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:26:29,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 09:26:29,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-31 09:26:29,909 INFO L87 Difference]: Start difference. First operand 283 states and 363 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:26:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:26:30,108 INFO L93 Difference]: Finished difference Result 331 states and 431 transitions. [2022-01-31 09:26:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:26:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 290 [2022-01-31 09:26:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:26:30,110 INFO L225 Difference]: With dead ends: 331 [2022-01-31 09:26:30,110 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 09:26:30,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:26:30,111 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:26:30,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 164 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:26:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 09:26:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 283. [2022-01-31 09:26:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 267 states have (on average 1.2734082397003745) internal successors, (340), 268 states have internal predecessors, (340), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:26:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 359 transitions. [2022-01-31 09:26:30,117 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 359 transitions. Word has length 290 [2022-01-31 09:26:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:26:30,117 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 359 transitions. [2022-01-31 09:26:30,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:26:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 359 transitions. [2022-01-31 09:26:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 09:26:30,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:26:30,119 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 42, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:26:30,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:26:30,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:26:30,339 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:26:30,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:26:30,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1720983947, now seen corresponding path program 1 times [2022-01-31 09:26:30,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:26:30,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910498649] [2022-01-31 09:26:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:26:30,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:26:30,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:26:30,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298476817] [2022-01-31 09:26:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:26:30,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:26:30,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:26:30,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:26:30,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:26:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:26:30,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 09:26:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:26:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 09:26:32,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:26:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 10 proven. 5221 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-31 09:26:35,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:26:35,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910498649] [2022-01-31 09:26:35,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:26:35,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298476817] [2022-01-31 09:26:35,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298476817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:26:35,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:26:35,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-31 09:26:35,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184944592] [2022-01-31 09:26:35,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:26:35,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 09:26:35,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:26:35,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 09:26:35,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 09:26:35,712 INFO L87 Difference]: Start difference. First operand 283 states and 359 transitions. Second operand has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:26:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:26:44,603 INFO L93 Difference]: Finished difference Result 2799 states and 4126 transitions. [2022-01-31 09:26:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 09:26:44,604 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 290 [2022-01-31 09:26:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:26:44,613 INFO L225 Difference]: With dead ends: 2799 [2022-01-31 09:26:44,614 INFO L226 Difference]: Without dead ends: 2799 [2022-01-31 09:26:44,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 09:26:44,617 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 3494 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:26:44,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3541 Valid, 425 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 09:26:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2022-01-31 09:26:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 523. [2022-01-31 09:26:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 507 states have (on average 1.2859960552268244) internal successors, (652), 508 states have internal predecessors, (652), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:26:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 671 transitions. [2022-01-31 09:26:44,671 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 671 transitions. Word has length 290 [2022-01-31 09:26:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:26:44,672 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 671 transitions. [2022-01-31 09:26:44,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:26:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 671 transitions. [2022-01-31 09:26:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-31 09:26:44,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:26:44,677 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:26:44,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:26:44,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 09:26:44,896 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:26:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:26:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -648402955, now seen corresponding path program 2 times [2022-01-31 09:26:44,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:26:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69115126] [2022-01-31 09:26:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:26:44,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:26:44,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:26:44,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078621287] [2022-01-31 09:26:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:26:44,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:26:44,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:26:44,935 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:26:44,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:26:45,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:26:45,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:26:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 09:26:45,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:26:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 22054 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 09:26:50,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:27:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22054 backedges. 10 proven. 21949 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-31 09:27:16,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:16,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69115126] [2022-01-31 09:27:16,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:27:16,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078621287] [2022-01-31 09:27:16,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078621287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:27:16,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:27:16,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-01-31 09:27:16,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725076331] [2022-01-31 09:27:16,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:27:16,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 09:27:16,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 09:27:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 09:27:16,302 INFO L87 Difference]: Start difference. First operand 523 states and 671 transitions. Second operand has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:29:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:29:56,020 INFO L93 Difference]: Finished difference Result 5679 states and 8398 transitions. [2022-01-31 09:29:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 09:29:56,026 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 530 [2022-01-31 09:29:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:29:56,043 INFO L225 Difference]: With dead ends: 5679 [2022-01-31 09:29:56,043 INFO L226 Difference]: Without dead ends: 5679 [2022-01-31 09:29:56,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1154 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 157.8s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 09:29:56,050 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7258 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 2359 mSolverCounterSat, 2940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7353 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2940 IncrementalHoareTripleChecker+Valid, 2359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:29:56,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7353 Valid, 827 Invalid, 5299 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2940 Valid, 2359 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-01-31 09:29:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5679 states. [2022-01-31 09:29:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5679 to 1003. [2022-01-31 09:29:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 987 states have (on average 1.292806484295846) internal successors, (1276), 988 states have internal predecessors, (1276), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:29:56,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1295 transitions. [2022-01-31 09:29:56,166 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1295 transitions. Word has length 530 [2022-01-31 09:29:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:29:56,167 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1295 transitions. [2022-01-31 09:29:56,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:29:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1295 transitions. [2022-01-31 09:29:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:29:56,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:29:56,174 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 186, 95, 95, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:29:56,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:29:56,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 09:29:56,375 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:29:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:29:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1117141749, now seen corresponding path program 3 times [2022-01-31 09:29:56,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:29:56,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550554383] [2022-01-31 09:29:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:29:56,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:29:56,459 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:29:56,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449767413] [2022-01-31 09:29:56,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:29:56,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:29:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:29:56,460 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:29:56,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:29:56,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:29:56,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:29:56,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:29:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:30:00,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 09:30:02,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-01-31 09:30:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 189 proven. 757 refuted. 0 times theorem prover too weak. 89124 trivial. 0 not checked. [2022-01-31 09:30:18,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:31:57,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:31:57,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550554383] [2022-01-31 09:31:57,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:31:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449767413] [2022-01-31 09:31:57,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449767413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:31:57,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:31:57,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 09:31:57,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546796708] [2022-01-31 09:31:57,928 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 09:31:57,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 09:31:57,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:31:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 09:31:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=147, Unknown=6, NotChecked=0, Total=210 [2022-01-31 09:31:57,929 INFO L87 Difference]: Start difference. First operand 1003 states and 1295 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:31:59,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:02,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:04,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:06,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:08,697 WARN L534 Checker$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 09:32:10,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:17,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:24,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:26,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:28,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:30,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:33,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 09:32:37,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:49,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:51,501 WARN L534 Checker$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 09:32:53,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:55,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:58,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:33:00,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:33:02,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 09:33:04,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:33:06,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:33:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:33:07,162 INFO L93 Difference]: Finished difference Result 1391 states and 1781 transitions. [2022-01-31 09:33:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 09:33:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 1010 [2022-01-31 09:33:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:33:07,176 INFO L225 Difference]: With dead ends: 1391 [2022-01-31 09:33:07,176 INFO L226 Difference]: Without dead ends: 1391 [2022-01-31 09:33:07,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2014 GetRequests, 1996 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=123, Invalid=247, Unknown=10, NotChecked=0, Total=380 [2022-01-31 09:33:07,177 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 17 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 47.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:33:07,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 73 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 61 Invalid, 22 Unknown, 3 Unchecked, 47.9s Time] [2022-01-31 09:33:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-01-31 09:33:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1005. [2022-01-31 09:33:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 989 states have (on average 1.2932254802831142) internal successors, (1279), 990 states have internal predecessors, (1279), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:33:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1298 transitions. [2022-01-31 09:33:07,193 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1298 transitions. Word has length 1010 [2022-01-31 09:33:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:33:07,193 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1298 transitions. [2022-01-31 09:33:07,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:33:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1298 transitions. [2022-01-31 09:33:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:33:07,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:33:07,201 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 185, 95, 95, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:33:07,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 09:33:07,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 09:33:07,407 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:33:07,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:33:07,407 INFO L85 PathProgramCache]: Analyzing trace with hash 876601620, now seen corresponding path program 4 times [2022-01-31 09:33:07,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:33:07,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398633850] [2022-01-31 09:33:07,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:33:07,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:33:07,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:33:07,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067425706] [2022-01-31 09:33:07,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:33:07,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:33:07,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:33:07,479 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:33:07,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:33:08,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:33:08,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:33:08,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2666 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:33:08,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:33:08,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 09:33:08,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-31 09:33:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 4491 proven. 4 refuted. 0 times theorem prover too weak. 85575 trivial. 0 not checked. [2022-01-31 09:33:09,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:33:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 4493 proven. 12 refuted. 0 times theorem prover too weak. 85565 trivial. 0 not checked. [2022-01-31 09:33:10,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:33:10,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398633850] [2022-01-31 09:33:10,627 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:33:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067425706] [2022-01-31 09:33:10,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067425706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:33:10,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:33:10,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-31 09:33:10,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524493248] [2022-01-31 09:33:10,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:33:10,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:33:10,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:33:10,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:33:10,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:33:10,629 INFO L87 Difference]: Start difference. First operand 1005 states and 1298 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:33:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:33:11,235 INFO L93 Difference]: Finished difference Result 1336 states and 1561 transitions. [2022-01-31 09:33:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:33:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 1010 [2022-01-31 09:33:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:33:11,243 INFO L225 Difference]: With dead ends: 1336 [2022-01-31 09:33:11,243 INFO L226 Difference]: Without dead ends: 1336 [2022-01-31 09:33:11,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2028 GetRequests, 2005 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:33:11,244 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:33:11,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 242 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 09:33:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-01-31 09:33:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1193. [2022-01-31 09:33:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1177 states have (on average 1.1682242990654206) internal successors, (1375), 1178 states have internal predecessors, (1375), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:33:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1394 transitions. [2022-01-31 09:33:11,257 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1394 transitions. Word has length 1010 [2022-01-31 09:33:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:33:11,257 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 1394 transitions. [2022-01-31 09:33:11,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:33:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1394 transitions. [2022-01-31 09:33:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:33:11,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:33:11,265 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 96, 95, 95, 94, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:33:11,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 09:33:11,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 09:33:11,485 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:33:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:33:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash 868468597, now seen corresponding path program 5 times [2022-01-31 09:33:11,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:33:11,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287758383] [2022-01-31 09:33:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:33:11,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:33:11,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:33:11,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811516395] [2022-01-31 09:33:11,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:33:11,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:33:11,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:33:11,564 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:33:11,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process