/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 14:25:34,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 14:25:34,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 14:25:34,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 14:25:34,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 14:25:34,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 14:25:34,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 14:25:34,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 14:25:34,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 14:25:34,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 14:25:34,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 14:25:34,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 14:25:34,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 14:25:34,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 14:25:34,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 14:25:34,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 14:25:34,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 14:25:34,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 14:25:34,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 14:25:34,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 14:25:34,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 14:25:34,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 14:25:34,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 14:25:34,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 14:25:34,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 14:25:34,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 14:25:34,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 14:25:34,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 14:25:34,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 14:25:34,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 14:25:34,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 14:25:34,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 14:25:34,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 14:25:34,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 14:25:34,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 14:25:34,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 14:25:34,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 14:25:34,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 14:25:34,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 14:25:34,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 14:25:34,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 14:25:34,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 14:25:34,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 14:25:34,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 14:25:34,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 14:25:34,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 14:25:34,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 14:25:34,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 14:25:34,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 14:25:34,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 14:25:34,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 14:25:34,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 14:25:34,665 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 14:25:34,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 14:25:34,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 14:25:34,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 14:25:34,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 14:25:34,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 14:25:34,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 14:25:34,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 14:25:34,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:25:34,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 14:25:34,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 14:25:34,668 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 14:25:34,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 14:25:34,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 14:25:34,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 14:25:34,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 14:25:34,910 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 14:25:34,910 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 14:25:34,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2022-01-31 14:25:34,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f746662e5/86ec7668096c474491019ba017219ebe/FLAG6d5998989 [2022-01-31 14:25:35,347 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 14:25:35,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2022-01-31 14:25:35,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f746662e5/86ec7668096c474491019ba017219ebe/FLAG6d5998989 [2022-01-31 14:25:35,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f746662e5/86ec7668096c474491019ba017219ebe [2022-01-31 14:25:35,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 14:25:35,380 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 14:25:35,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 14:25:35,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 14:25:35,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 14:25:35,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a39c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35, skipping insertion in model container [2022-01-31 14:25:35,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 14:25:35,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 14:25:35,555 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c[490,503] [2022-01-31 14:25:35,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:25:35,597 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 14:25:35,609 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c[490,503] [2022-01-31 14:25:35,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:25:35,654 INFO L208 MainTranslator]: Completed translation [2022-01-31 14:25:35,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35 WrapperNode [2022-01-31 14:25:35,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 14:25:35,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 14:25:35,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 14:25:35,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 14:25:35,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 14:25:35,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 14:25:35,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 14:25:35,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 14:25:35,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:25:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:35,712 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 14:25:35,742 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 14:25:35,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 14:25:35,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 14:25:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 14:25:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 14:25:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 14:25:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 14:25:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 14:25:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 14:25:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 14:25:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 14:25:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 14:25:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 14:25:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 14:25:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 14:25:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 14:25:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 14:25:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 14:25:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 14:25:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 14:25:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 14:25:35,835 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 14:25:35,836 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 14:25:35,946 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 14:25:35,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 14:25:35,951 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 14:25:35,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:25:35 BoogieIcfgContainer [2022-01-31 14:25:35,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 14:25:35,969 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 14:25:35,969 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 14:25:35,972 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 14:25:35,974 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:25:35" (1/1) ... [2022-01-31 14:25:35,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:25:35 BasicIcfg [2022-01-31 14:25:35,993 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 14:25:36,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 14:25:36,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 14:25:36,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 14:25:36,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:25:35" (1/4) ... [2022-01-31 14:25:36,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534e4353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:25:36, skipping insertion in model container [2022-01-31 14:25:36,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:35" (2/4) ... [2022-01-31 14:25:36,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534e4353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:25:36, skipping insertion in model container [2022-01-31 14:25:36,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:25:35" (3/4) ... [2022-01-31 14:25:36,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534e4353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:25:36, skipping insertion in model container [2022-01-31 14:25:36,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:25:35" (4/4) ... [2022-01-31 14:25:36,013 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.cJordan [2022-01-31 14:25:36,017 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 14:25:36,017 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 14:25:36,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 14:25:36,076 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 14:25:36,077 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 14:25:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 14:25:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 14:25:36,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:36,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:36,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2022-01-31 14:25:36,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:36,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824462770] [2022-01-31 14:25:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:36,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:36,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:36,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967222026] [2022-01-31 14:25:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:36,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:36,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:36,190 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 14:25:36,215 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 14:25:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-31 14:25:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:25:36,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:25:36,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:36,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824462770] [2022-01-31 14:25:36,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:36,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967222026] [2022-01-31 14:25:36,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967222026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:25:36,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:25:36,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-31 14:25:36,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999345473] [2022-01-31 14:25:36,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:25:36,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-31 14:25:36,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-31 14:25:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 14:25:36,491 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:25:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:36,518 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-01-31 14:25:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-31 14:25:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2022-01-31 14:25:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:36,528 INFO L225 Difference]: With dead ends: 39 [2022-01-31 14:25:36,528 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 14:25:36,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 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 14:25:36,536 INFO L933 BasicCegarLoop]: 50 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, 50 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 14:25:36,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:25:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 14:25:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 14:25:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:25:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-01-31 14:25:36,578 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-01-31 14:25:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:36,580 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-01-31 14:25:36,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:25:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-01-31 14:25:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 14:25:36,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:36,583 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:36,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 14:25:36,806 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 14:25:36,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2022-01-31 14:25:36,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:36,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005306204] [2022-01-31 14:25:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:36,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:36,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:36,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071454839] [2022-01-31 14:25:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:36,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:36,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:36,827 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 14:25:36,843 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 14:25:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:36,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:25:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:25:37,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:25:37,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:37,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005306204] [2022-01-31 14:25:37,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:37,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071454839] [2022-01-31 14:25:37,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071454839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:25:37,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:25:37,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 14:25:37,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100320680] [2022-01-31 14:25:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:25:37,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 14:25:37,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 14:25:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:25:37,064 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:25:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:37,091 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-01-31 14:25:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 14:25:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-01-31 14:25:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:37,093 INFO L225 Difference]: With dead ends: 36 [2022-01-31 14:25:37,093 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 14:25:37,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:25:37,095 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:37,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:25:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 14:25:37,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 14:25:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:25:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-01-31 14:25:37,107 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-01-31 14:25:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:37,107 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-01-31 14:25:37,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:25:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-01-31 14:25:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 14:25:37,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:37,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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 14:25:37,130 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 14:25:37,323 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 14:25:37,324 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:37,324 INFO L85 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2022-01-31 14:25:37,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:37,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992423377] [2022-01-31 14:25:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:37,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:37,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:37,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87585016] [2022-01-31 14:25:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:37,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:37,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:37,342 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 14:25:37,359 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 14:25:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:37,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:25:37,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 14:25:37,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 14:25:37,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992423377] [2022-01-31 14:25:37,669 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87585016] [2022-01-31 14:25:37,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87585016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:25:37,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:25:37,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-01-31 14:25:37,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314033557] [2022-01-31 14:25:37,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:37,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 14:25:37,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 14:25:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 14:25:37,674 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:25:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:37,755 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2022-01-31 14:25:37,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:25:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-01-31 14:25:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:37,759 INFO L225 Difference]: With dead ends: 45 [2022-01-31 14:25:37,759 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 14:25:37,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:25:37,762 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:37,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 127 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:25:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 14:25:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-01-31 14:25:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:25:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-01-31 14:25:37,781 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-01-31 14:25:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:37,781 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-01-31 14:25:37,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:25:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-01-31 14:25:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 14:25:37,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:37,786 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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 14:25:37,814 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 14:25:37,999 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 14:25:38,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2022-01-31 14:25:38,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:38,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448497914] [2022-01-31 14:25:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:38,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:38,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:38,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808144910] [2022-01-31 14:25:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:38,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:38,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:38,017 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 14:25:38,047 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 14:25:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 14:25:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 14:25:38,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:25:38,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:38,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448497914] [2022-01-31 14:25:38,332 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:38,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808144910] [2022-01-31 14:25:38,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808144910] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:25:38,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:25:38,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-01-31 14:25:38,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345941350] [2022-01-31 14:25:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:25:38,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:25:38,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:25:38,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:25:38,336 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:25:38,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:38,374 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-01-31 14:25:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:25:38,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-01-31 14:25:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:38,375 INFO L225 Difference]: With dead ends: 41 [2022-01-31 14:25:38,375 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 14:25:38,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:25:38,376 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:38,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:25:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 14:25:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-31 14:25:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:25:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-01-31 14:25:38,381 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 36 [2022-01-31 14:25:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:38,381 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-01-31 14:25:38,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:25:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-01-31 14:25:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 14:25:38,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:38,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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 14:25:38,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 14:25:38,605 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 14:25:38,605 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:38,606 INFO L85 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2022-01-31 14:25:38,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:38,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488704296] [2022-01-31 14:25:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:38,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:38,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:38,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551161150] [2022-01-31 14:25:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:38,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:38,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:38,624 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 14:25:38,624 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 14:25:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:38,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:25:38,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:25:38,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:25:38,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:38,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488704296] [2022-01-31 14:25:38,741 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:38,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551161150] [2022-01-31 14:25:38,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551161150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:25:38,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:25:38,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:25:38,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518008416] [2022-01-31 14:25:38,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:25:38,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:25:38,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:38,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:25:38,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:25:38,743 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:25:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:38,765 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 14:25:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:25:38,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-01-31 14:25:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:38,766 INFO L225 Difference]: With dead ends: 43 [2022-01-31 14:25:38,767 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 14:25:38,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:25:38,767 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:38,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:25:38,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 14:25:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-31 14:25:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:25:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-01-31 14:25:38,772 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2022-01-31 14:25:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:38,772 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-01-31 14:25:38,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:25:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-01-31 14:25:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 14:25:38,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:38,774 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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, 1, 1] [2022-01-31 14:25:38,801 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 14:25:38,992 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 14:25:38,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:38,993 INFO L85 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2022-01-31 14:25:38,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:38,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570160072] [2022-01-31 14:25:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:38,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:39,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:39,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711189374] [2022-01-31 14:25:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:39,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:39,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:39,005 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 14:25:39,024 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 14:25:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 14:25:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 14:25:39,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:25:39,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570160072] [2022-01-31 14:25:39,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711189374] [2022-01-31 14:25:39,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711189374] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:25:39,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:25:39,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-01-31 14:25:39,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511702972] [2022-01-31 14:25:39,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:25:39,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:25:39,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:25:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:25:39,371 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 14:25:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:39,402 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-01-31 14:25:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:25:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-01-31 14:25:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:39,404 INFO L225 Difference]: With dead ends: 55 [2022-01-31 14:25:39,404 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 14:25:39,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:25:39,405 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:39,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:25:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 14:25:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 14:25:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 14:25:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-01-31 14:25:39,411 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 41 [2022-01-31 14:25:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:39,411 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-01-31 14:25:39,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 14:25:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-01-31 14:25:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 14:25:39,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:39,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 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, 1, 1] [2022-01-31 14:25:39,437 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 14:25:39,631 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 14:25:39,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2022-01-31 14:25:39,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:39,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762996869] [2022-01-31 14:25:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:39,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:39,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:39,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379309923] [2022-01-31 14:25:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:39,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:39,645 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 14:25:39,675 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 14:25:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:39,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 14:25:39,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 14:25:39,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 14:25:39,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762996869] [2022-01-31 14:25:39,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379309923] [2022-01-31 14:25:39,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379309923] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:25:39,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:25:39,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-01-31 14:25:39,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597454470] [2022-01-31 14:25:39,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:25:39,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:25:39,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:39,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:25:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:25:39,995 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 14:25:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:40,034 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-01-31 14:25:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:25:40,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-01-31 14:25:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:40,040 INFO L225 Difference]: With dead ends: 59 [2022-01-31 14:25:40,040 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 14:25:40,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:25:40,044 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:40,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:25:40,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 14:25:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 14:25:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 14:25:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-01-31 14:25:40,058 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 46 [2022-01-31 14:25:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:40,059 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-01-31 14:25:40,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 14:25:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-01-31 14:25:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 14:25:40,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:40,060 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1] [2022-01-31 14:25:40,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 14:25:40,267 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 14:25:40,268 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2022-01-31 14:25:40,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:40,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714249382] [2022-01-31 14:25:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:40,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:40,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:40,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326964125] [2022-01-31 14:25:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:40,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:40,281 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 14:25:40,283 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 14:25:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 14:25:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 14:25:40,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:40,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:40,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714249382] [2022-01-31 14:25:40,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:40,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326964125] [2022-01-31 14:25:40,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326964125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:25:40,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:25:40,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-01-31 14:25:40,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852229797] [2022-01-31 14:25:40,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:40,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:25:40,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:25:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:25:40,695 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 14:25:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:40,851 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-01-31 14:25:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 14:25:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-01-31 14:25:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:40,852 INFO L225 Difference]: With dead ends: 63 [2022-01-31 14:25:40,852 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 14:25:40,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-31 14:25:40,853 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:40,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 190 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:25:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 14:25:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 14:25:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 14:25:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-01-31 14:25:40,858 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2022-01-31 14:25:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:40,858 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-01-31 14:25:40,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 14:25:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-01-31 14:25:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 14:25:40,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:40,859 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:40,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 14:25:41,072 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 14:25:41,073 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2022-01-31 14:25:41,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:41,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196882300] [2022-01-31 14:25:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:41,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:41,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:41,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995902977] [2022-01-31 14:25:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:41,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:41,087 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 14:25:41,089 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 14:25:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:41,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:25:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 14:25:41,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 14:25:41,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:41,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196882300] [2022-01-31 14:25:41,356 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:41,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995902977] [2022-01-31 14:25:41,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995902977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:25:41,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:25:41,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-31 14:25:41,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652679143] [2022-01-31 14:25:41,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:41,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:25:41,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:41,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:25:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:25:41,358 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2022-01-31 14:25:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:41,474 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2022-01-31 14:25:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:25:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) Word has length 60 [2022-01-31 14:25:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:41,477 INFO L225 Difference]: With dead ends: 165 [2022-01-31 14:25:41,477 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 14:25:41,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:25:41,478 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 73 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:41,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 237 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:25:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 14:25:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2022-01-31 14:25:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 104 states have internal predecessors, (119), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 14:25:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-01-31 14:25:41,488 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 60 [2022-01-31 14:25:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:41,488 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-01-31 14:25:41,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2022-01-31 14:25:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-01-31 14:25:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 14:25:41,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:41,489 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:41,518 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 14:25:41,703 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 14:25:41,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2022-01-31 14:25:41,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339296134] [2022-01-31 14:25:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:41,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:41,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:41,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775712350] [2022-01-31 14:25:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:41,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:41,716 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 14:25:41,717 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 14:25:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:41,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:25:41,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-31 14:25:41,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-31 14:25:42,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339296134] [2022-01-31 14:25:42,052 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775712350] [2022-01-31 14:25:42,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775712350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:25:42,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:25:42,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-01-31 14:25:42,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565771016] [2022-01-31 14:25:42,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:42,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:25:42,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:25:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:25:42,055 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 14:25:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:42,196 INFO L93 Difference]: Finished difference Result 211 states and 274 transitions. [2022-01-31 14:25:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:25:42,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-01-31 14:25:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:42,200 INFO L225 Difference]: With dead ends: 211 [2022-01-31 14:25:42,200 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 14:25:42,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 14:25:42,201 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 63 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:42,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 390 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:25:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 14:25:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 189. [2022-01-31 14:25:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 124 states have internal predecessors, (148), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 14:25:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 237 transitions. [2022-01-31 14:25:42,224 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 237 transitions. Word has length 61 [2022-01-31 14:25:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:42,224 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 237 transitions. [2022-01-31 14:25:42,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 14:25:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 237 transitions. [2022-01-31 14:25:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 14:25:42,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:42,229 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:42,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 14:25:42,443 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 14:25:42,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 317217743, now seen corresponding path program 1 times [2022-01-31 14:25:42,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:42,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841765980] [2022-01-31 14:25:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:42,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:42,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:42,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855555954] [2022-01-31 14:25:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:42,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:42,455 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 14:25:42,457 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 14:25:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:42,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:25:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 14:25:42,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 14:25:42,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841765980] [2022-01-31 14:25:42,734 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855555954] [2022-01-31 14:25:42,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855555954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:25:42,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:25:42,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-31 14:25:42,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009276610] [2022-01-31 14:25:42,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:42,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:25:42,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:25:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:25:42,736 INFO L87 Difference]: Start difference. First operand 189 states and 237 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2022-01-31 14:25:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:42,839 INFO L93 Difference]: Finished difference Result 197 states and 241 transitions. [2022-01-31 14:25:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:25:42,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) Word has length 63 [2022-01-31 14:25:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:42,842 INFO L225 Difference]: With dead ends: 197 [2022-01-31 14:25:42,842 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 14:25:42,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:25:42,843 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 73 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:42,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 169 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:25:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 14:25:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-01-31 14:25:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 128 states have (on average 1.1796875) internal successors, (151), 130 states have internal predecessors, (151), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 14:25:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2022-01-31 14:25:42,851 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 63 [2022-01-31 14:25:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:42,851 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2022-01-31 14:25:42,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2022-01-31 14:25:42,851 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2022-01-31 14:25:42,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 14:25:42,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:42,852 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:42,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-31 14:25:43,071 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 14:25:43,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2022-01-31 14:25:43,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:43,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247231809] [2022-01-31 14:25:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:43,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:43,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:43,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554915642] [2022-01-31 14:25:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:43,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:43,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:43,082 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 14:25:43,087 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 14:25:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 14:25:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 14:25:43,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 14:25:43,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247231809] [2022-01-31 14:25:43,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554915642] [2022-01-31 14:25:43,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554915642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:25:43,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:25:43,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-01-31 14:25:43,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904969615] [2022-01-31 14:25:43,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:43,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 14:25:43,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 14:25:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:25:43,642 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-01-31 14:25:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:43,907 INFO L93 Difference]: Finished difference Result 270 states and 355 transitions. [2022-01-31 14:25:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 14:25:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 68 [2022-01-31 14:25:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:43,910 INFO L225 Difference]: With dead ends: 270 [2022-01-31 14:25:43,910 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 14:25:43,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-31 14:25:43,911 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:43,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 308 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:25:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 14:25:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 237. [2022-01-31 14:25:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 156 states have (on average 1.2115384615384615) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 23 states have call predecessors, (58), 22 states have return successors, (54), 49 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 14:25:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 301 transitions. [2022-01-31 14:25:43,921 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 301 transitions. Word has length 68 [2022-01-31 14:25:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:43,922 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 301 transitions. [2022-01-31 14:25:43,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-01-31 14:25:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 301 transitions. [2022-01-31 14:25:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 14:25:43,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:43,923 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:43,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 14:25:44,138 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 14:25:44,138 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:44,139 INFO L85 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2022-01-31 14:25:44,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:44,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056228540] [2022-01-31 14:25:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:44,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:44,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:44,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397470401] [2022-01-31 14:25:44,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:25:44,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:44,151 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 14:25:44,153 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 14:25:44,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:25:44,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:25:44,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 14:25:44,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-31 14:25:44,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-31 14:25:44,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056228540] [2022-01-31 14:25:44,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:44,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397470401] [2022-01-31 14:25:44,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397470401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:25:44,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:25:44,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-01-31 14:25:44,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031808362] [2022-01-31 14:25:44,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:44,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 14:25:44,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:44,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 14:25:44,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-31 14:25:44,914 INFO L87 Difference]: Start difference. First operand 237 states and 301 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-31 14:25:47,680 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 14:25:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:47,986 INFO L93 Difference]: Finished difference Result 339 states and 453 transitions. [2022-01-31 14:25:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 14:25:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 73 [2022-01-31 14:25:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:47,988 INFO L225 Difference]: With dead ends: 339 [2022-01-31 14:25:47,989 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 14:25:47,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-01-31 14:25:47,989 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 81 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 117 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:47,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 265 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 14:25:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 14:25:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 331. [2022-01-31 14:25:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 217 states have (on average 1.262672811059908) internal successors, (274), 228 states have internal predecessors, (274), 87 states have call successors, (87), 27 states have call predecessors, (87), 26 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 14:25:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 444 transitions. [2022-01-31 14:25:48,001 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 444 transitions. Word has length 73 [2022-01-31 14:25:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:48,001 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 444 transitions. [2022-01-31 14:25:48,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-31 14:25:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 444 transitions. [2022-01-31 14:25:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 14:25:48,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:48,002 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:48,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 14:25:48,215 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 14:25:48,215 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2022-01-31 14:25:48,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772907643] [2022-01-31 14:25:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:48,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:48,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:48,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056658284] [2022-01-31 14:25:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:25:48,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:48,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:48,225 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 14:25:48,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 14:25:48,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 14:25:48,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:25:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 14:25:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-31 14:25:48,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:48,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:48,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772907643] [2022-01-31 14:25:48,852 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:48,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056658284] [2022-01-31 14:25:48,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056658284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:25:48,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:25:48,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 14:25:48,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215657297] [2022-01-31 14:25:48,853 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:48,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:25:48,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:25:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:25:48,854 INFO L87 Difference]: Start difference. First operand 331 states and 444 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-31 14:25:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:49,084 INFO L93 Difference]: Finished difference Result 345 states and 455 transitions. [2022-01-31 14:25:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 14:25:49,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-01-31 14:25:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:49,088 INFO L225 Difference]: With dead ends: 345 [2022-01-31 14:25:49,088 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 14:25:49,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:25:49,089 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 23 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:49,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 286 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:25:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 14:25:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2022-01-31 14:25:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 225 states have (on average 1.248888888888889) internal successors, (281), 235 states have internal predecessors, (281), 87 states have call successors, (87), 30 states have call predecessors, (87), 28 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 14:25:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 451 transitions. [2022-01-31 14:25:49,105 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 451 transitions. Word has length 78 [2022-01-31 14:25:49,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:49,105 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 451 transitions. [2022-01-31 14:25:49,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-31 14:25:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 451 transitions. [2022-01-31 14:25:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 14:25:49,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:49,107 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:49,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 14:25:49,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:49,321 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2022-01-31 14:25:49,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:49,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199452023] [2022-01-31 14:25:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:49,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:49,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:49,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972942093] [2022-01-31 14:25:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:49,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:49,335 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:25:49,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 14:25:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:49,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 14:25:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-01-31 14:25:49,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-01-31 14:25:50,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199452023] [2022-01-31 14:25:50,613 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972942093] [2022-01-31 14:25:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972942093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:25:50,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:25:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-01-31 14:25:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023470828] [2022-01-31 14:25:50,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:25:50,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 14:25:50,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 14:25:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-31 14:25:50,614 INFO L87 Difference]: Start difference. First operand 341 states and 451 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 14:25:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:53,571 INFO L93 Difference]: Finished difference Result 413 states and 557 transitions. [2022-01-31 14:25:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 14:25:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 84 [2022-01-31 14:25:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:53,574 INFO L225 Difference]: With dead ends: 413 [2022-01-31 14:25:53,574 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 14:25:53,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 14:25:53,575 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 92 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:53,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 581 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 14:25:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 14:25:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 391. [2022-01-31 14:25:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 257 states have (on average 1.264591439688716) internal successors, (325), 267 states have internal predecessors, (325), 104 states have call successors, (104), 30 states have call predecessors, (104), 29 states have return successors, (101), 93 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 14:25:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 530 transitions. [2022-01-31 14:25:53,588 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 530 transitions. Word has length 84 [2022-01-31 14:25:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:53,588 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 530 transitions. [2022-01-31 14:25:53,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 14:25:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 530 transitions. [2022-01-31 14:25:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 14:25:53,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:53,589 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:25:53,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 14:25:53,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 14:25:53,807 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1881160278, now seen corresponding path program 1 times [2022-01-31 14:25:53,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:53,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337638546] [2022-01-31 14:25:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:53,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:53,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:53,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738893366] [2022-01-31 14:25:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:53,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:53,820 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:25:53,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 14:25:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:25:53,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-01-31 14:25:53,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:25:53,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:25:53,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337638546] [2022-01-31 14:25:53,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:25:53,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738893366] [2022-01-31 14:25:53,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738893366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:25:53,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:25:53,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:25:53,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339653786] [2022-01-31 14:25:53,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:25:53,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:25:53,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:25:53,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:25:53,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:25:53,996 INFO L87 Difference]: Start difference. First operand 391 states and 530 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-31 14:25:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:25:54,048 INFO L93 Difference]: Finished difference Result 456 states and 633 transitions. [2022-01-31 14:25:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:25:54,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2022-01-31 14:25:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:25:54,051 INFO L225 Difference]: With dead ends: 456 [2022-01-31 14:25:54,051 INFO L226 Difference]: Without dead ends: 456 [2022-01-31 14:25:54,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 14:25:54,051 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 11 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:25:54,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 196 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:25:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-31 14:25:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 419. [2022-01-31 14:25:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 273 states have (on average 1.2673992673992673) internal successors, (346), 282 states have internal predecessors, (346), 116 states have call successors, (116), 30 states have call predecessors, (116), 29 states have return successors, (113), 106 states have call predecessors, (113), 113 states have call successors, (113) [2022-01-31 14:25:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 575 transitions. [2022-01-31 14:25:54,065 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 575 transitions. Word has length 93 [2022-01-31 14:25:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:25:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 575 transitions. [2022-01-31 14:25:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-31 14:25:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 575 transitions. [2022-01-31 14:25:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 14:25:54,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:25:54,066 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:25:54,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 14:25:54,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 14:25:54,279 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:25:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:25:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2022-01-31 14:25:54,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:25:54,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239094697] [2022-01-31 14:25:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:54,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:25:54,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:25:54,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727568425] [2022-01-31 14:25:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:25:54,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:25:54,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:25:54,292 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:25:54,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 14:25:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:25:54,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 14:25:54,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:25:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-01-31 14:25:55,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:25:55,559 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:26:00,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:26:00,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239094697] [2022-01-31 14:26:00,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:26:00,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727568425] [2022-01-31 14:26:00,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727568425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:26:00,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:26:00,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-01-31 14:26:00,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519402068] [2022-01-31 14:26:00,372 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:26:00,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 14:26:00,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:26:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 14:26:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2022-01-31 14:26:00,373 INFO L87 Difference]: Start difference. First operand 419 states and 575 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-31 14:26:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:26:00,836 INFO L93 Difference]: Finished difference Result 429 states and 583 transitions. [2022-01-31 14:26:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:26:00,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2022-01-31 14:26:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:26:00,838 INFO L225 Difference]: With dead ends: 429 [2022-01-31 14:26:00,838 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 14:26:00,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=71, Invalid=269, Unknown=2, NotChecked=0, Total=342 [2022-01-31 14:26:00,839 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 33 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:26:00,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 367 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 14:26:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 14:26:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 427. [2022-01-31 14:26:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 279 states have (on average 1.2616487455197132) internal successors, (352), 288 states have internal predecessors, (352), 116 states have call successors, (116), 32 states have call predecessors, (116), 31 states have return successors, (113), 106 states have call predecessors, (113), 113 states have call successors, (113) [2022-01-31 14:26:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 581 transitions. [2022-01-31 14:26:00,851 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 581 transitions. Word has length 101 [2022-01-31 14:26:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:26:00,851 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 581 transitions. [2022-01-31 14:26:00,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-31 14:26:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 581 transitions. [2022-01-31 14:26:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 14:26:00,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:26:00,853 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:26:00,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-31 14:26:01,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 14:26:01,067 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:26:01,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:26:01,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1392800366, now seen corresponding path program 1 times [2022-01-31 14:26:01,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:26:01,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929950888] [2022-01-31 14:26:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:26:01,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:26:01,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:26:01,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895585084] [2022-01-31 14:26:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:26:01,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:26:01,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:26:01,080 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:26:01,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 14:26:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 14:26:01,143 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 14:26:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 14:26:01,287 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-31 14:26:01,287 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 14:26:01,288 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 14:26:01,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 14:26:01,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 14:26:01,526 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:26:01,528 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 14:26:01,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:26:01 BasicIcfg [2022-01-31 14:26:01,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 14:26:01,578 INFO L158 Benchmark]: Toolchain (without parser) took 26198.21ms. Allocated memory was 192.9MB in the beginning and 360.7MB in the end (delta: 167.8MB). Free memory was 138.7MB in the beginning and 321.9MB in the end (delta: -183.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 14:26:01,579 INFO L158 Benchmark]: CDTParser took 0.57ms. Allocated memory is still 192.9MB. Free memory is still 155.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 14:26:01,579 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.17ms. Allocated memory was 192.9MB in the beginning and 299.9MB in the end (delta: 107.0MB). Free memory was 138.5MB in the beginning and 271.4MB in the end (delta: -132.8MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-01-31 14:26:01,579 INFO L158 Benchmark]: Boogie Preprocessor took 25.46ms. Allocated memory is still 299.9MB. Free memory was 270.8MB in the beginning and 269.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 14:26:01,579 INFO L158 Benchmark]: RCFGBuilder took 287.00ms. Allocated memory is still 299.9MB. Free memory was 269.8MB in the beginning and 256.7MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-01-31 14:26:01,580 INFO L158 Benchmark]: IcfgTransformer took 24.01ms. Allocated memory is still 299.9MB. Free memory was 256.7MB in the beginning and 255.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 14:26:01,580 INFO L158 Benchmark]: TraceAbstraction took 25570.27ms. Allocated memory was 299.9MB in the beginning and 360.7MB in the end (delta: 60.8MB). Free memory was 254.6MB in the beginning and 321.9MB in the end (delta: -67.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 14:26:01,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57ms. Allocated memory is still 192.9MB. Free memory is still 155.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 271.17ms. Allocated memory was 192.9MB in the beginning and 299.9MB in the end (delta: 107.0MB). Free memory was 138.5MB in the beginning and 271.4MB in the end (delta: -132.8MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.46ms. Allocated memory is still 299.9MB. Free memory was 270.8MB in the beginning and 269.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 287.00ms. Allocated memory is still 299.9MB. Free memory was 269.8MB in the beginning and 256.7MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 24.01ms. Allocated memory is still 299.9MB. Free memory was 256.7MB in the beginning and 255.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 25570.27ms. Allocated memory was 299.9MB in the beginning and 360.7MB in the end (delta: 60.8MB). Free memory was 254.6MB in the beginning and 321.9MB in the end (delta: -67.3MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=9, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=3, y=4] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=3, y=4] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=4, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=3, b=4, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=4, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=4, b=3, c=4, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [\old(counter)=0, a=4, b=3, c=1, counter=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, counter++=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=3, b=1, c=1, counter=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, c=1, counter=6, counter++=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=3, xy=12, y=4, yy=16] [L40] COND FALSE !(counter++<5) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.5s, OverallIterations: 18, TraceHistogramMax: 13, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 638 SdHoareTripleChecker+Valid, 6.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 589 mSDsluCounter, 3878 SdHoareTripleChecker+Invalid, 6.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3057 mSDsCounter, 589 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2249 IncrementalHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 589 mSolverCounterUnsat, 821 mSDtfsCounter, 2249 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1647 GetRequests, 1443 SyntacticMatches, 13 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=427occurred in iteration=17, InterpolantAutomatonStates: 155, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 133 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 1103 NumberOfCodeBlocks, 1083 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1532 ConstructedInterpolants, 0 QuantifiedInterpolants, 6387 SizeOfPredicates, 66 NumberOfNonLiveVariables, 3127 ConjunctsInSsa, 313 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 1781/1978 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-01-31 14:26:01,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...