/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/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 14:32:17,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 14:32:17,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 14:32:17,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 14:32:17,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 14:32:17,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 14:32:17,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 14:32:17,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 14:32:17,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 14:32:17,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 14:32:17,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 14:32:17,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 14:32:17,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 14:32:17,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 14:32:17,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 14:32:17,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 14:32:17,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 14:32:17,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 14:32:17,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 14:32:17,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 14:32:17,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 14:32:17,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 14:32:17,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 14:32:17,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 14:32:17,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 14:32:17,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 14:32:17,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 14:32:17,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 14:32:17,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 14:32:17,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 14:32:17,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 14:32:17,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 14:32:17,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 14:32:17,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 14:32:17,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 14:32:17,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 14:32:17,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 14:32:17,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 14:32:17,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 14:32:17,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 14:32:17,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 14:32:17,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 14:32:17,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 14:32:17,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 14:32:17,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 14:32:17,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 14:32:17,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 14:32:17,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 14:32:17,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 14:32:17,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 14:32:17,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 14:32:17,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 14:32:17,872 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 14:32:17,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 14:32:17,872 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 14:32:17,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 14:32:17,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 14:32:17,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 14:32:17,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 14:32:17,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 14:32:17,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:32:17,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 14:32:17,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 14:32:17,874 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 14:32:17,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 14:32:18,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 14:32:18,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 14:32:18,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 14:32:18,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 14:32:18,155 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 14:32:18,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-01-31 14:32:18,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead3a8c19/90d023f315c041e0aec2b98a50c31d71/FLAGdedac4cc5 [2022-01-31 14:32:18,583 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 14:32:18,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-01-31 14:32:18,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead3a8c19/90d023f315c041e0aec2b98a50c31d71/FLAGdedac4cc5 [2022-01-31 14:32:18,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead3a8c19/90d023f315c041e0aec2b98a50c31d71 [2022-01-31 14:32:18,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 14:32:18,621 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 14:32:18,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 14:32:18,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 14:32:18,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 14:32:18,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:18,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f84d68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18, skipping insertion in model container [2022-01-31 14:32:18,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:18,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 14:32:18,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 14:32:18,856 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/egcd3-ll_unwindbound50.c[490,503] [2022-01-31 14:32:18,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:32:18,904 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 14:32:18,913 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/egcd3-ll_unwindbound50.c[490,503] [2022-01-31 14:32:18,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:32:18,948 INFO L208 MainTranslator]: Completed translation [2022-01-31 14:32:18,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18 WrapperNode [2022-01-31 14:32:18,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 14:32:18,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 14:32:18,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 14:32:18,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 14:32:18,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:18,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:18,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:18,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:19,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:19,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:19,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:19,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 14:32:19,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 14:32:19,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 14:32:19,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 14:32:19,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (1/1) ... [2022-01-31 14:32:19,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:32:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:19,064 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 14:32:19,099 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 14:32:19,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 14:32:19,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 14:32:19,129 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 14:32:19,129 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 14:32:19,129 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 14:32:19,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 14:32:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 14:32:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 14:32:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 14:32:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 14:32:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 14:32:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 14:32:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 14:32:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 14:32:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 14:32:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 14:32:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 14:32:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 14:32:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 14:32:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 14:32:19,183 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 14:32:19,184 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 14:32:19,357 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 14:32:19,372 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 14:32:19,372 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 14:32:19,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:32:19 BoogieIcfgContainer [2022-01-31 14:32:19,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 14:32:19,374 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 14:32:19,374 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 14:32:19,377 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 14:32:19,380 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:32:19" (1/1) ... [2022-01-31 14:32:19,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:32:19 BasicIcfg [2022-01-31 14:32:19,392 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 14:32:19,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 14:32:19,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 14:32:19,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 14:32:19,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:32:18" (1/4) ... [2022-01-31 14:32:19,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff3b7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:32:19, skipping insertion in model container [2022-01-31 14:32:19,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:32:18" (2/4) ... [2022-01-31 14:32:19,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff3b7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:32:19, skipping insertion in model container [2022-01-31 14:32:19,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:32:19" (3/4) ... [2022-01-31 14:32:19,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff3b7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:32:19, skipping insertion in model container [2022-01-31 14:32:19,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:32:19" (4/4) ... [2022-01-31 14:32:19,398 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.cJordan [2022-01-31 14:32:19,401 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 14:32:19,401 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 14:32:19,429 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 14:32:19,434 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 14:32:19,434 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 14:32:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 14:32:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 14:32:19,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:19,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:19,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-01-31 14:32:19,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651941706] [2022-01-31 14:32:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:19,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:19,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:32:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:19,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:32:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:19,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 14:32:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:19,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:19,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651941706] [2022-01-31 14:32:19,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651941706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:19,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:19,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 14:32:19,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568069451] [2022-01-31 14:32:19,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:19,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 14:32:19,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 14:32:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:32:19,679 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:19,800 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-01-31 14:32:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 14:32:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 14:32:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:19,807 INFO L225 Difference]: With dead ends: 41 [2022-01-31 14:32:19,807 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 14:32:19,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:32:19,812 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:19,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:32:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 14:32:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 14:32:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 14:32:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-01-31 14:32:19,842 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-01-31 14:32:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:19,843 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-01-31 14:32:19,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-01-31 14:32:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 14:32:19,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:19,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:19,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 14:32:19,846 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-01-31 14:32:19,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:19,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792937164] [2022-01-31 14:32:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:19,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:19,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:19,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480756708] [2022-01-31 14:32:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:19,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:19,881 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 14:32:19,897 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 14:32:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:32:19,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:20,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:20,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792937164] [2022-01-31 14:32:20,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480756708] [2022-01-31 14:32:20,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480756708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:20,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:20,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 14:32:20,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855931531] [2022-01-31 14:32:20,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:20,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 14:32:20,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 14:32:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:32:20,142 INFO L87 Difference]: Start difference. First operand 35 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:20,162 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-01-31 14:32:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 14:32:20,163 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-31 14:32:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:20,165 INFO L225 Difference]: With dead ends: 37 [2022-01-31 14:32:20,165 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 14:32:20,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 14:32:20,167 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:20,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:32:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 14:32:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 14:32:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 14:32:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-01-31 14:32:20,172 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-01-31 14:32:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:20,172 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-01-31 14:32:20,173 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-01-31 14:32:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 14:32:20,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:20,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:20,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 14:32:20,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:20,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-01-31 14:32:20,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:20,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320052880] [2022-01-31 14:32:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:20,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:20,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:20,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882068661] [2022-01-31 14:32:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:20,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:20,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:20,404 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 14:32:20,467 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 14:32:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:32:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 14:32:20,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:20,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320052880] [2022-01-31 14:32:20,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882068661] [2022-01-31 14:32:20,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882068661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:20,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:20,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:32:20,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529958539] [2022-01-31 14:32:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:20,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:32:20,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:32:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:32:20,576 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 14:32:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:20,676 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-01-31 14:32:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:32:20,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-31 14:32:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:20,681 INFO L225 Difference]: With dead ends: 50 [2022-01-31 14:32:20,681 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 14:32:20,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 14:32:20,684 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:20,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:32:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 14:32:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-01-31 14:32:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 14:32:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-01-31 14:32:20,703 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-01-31 14:32:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:20,704 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-01-31 14:32:20,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 14:32:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-01-31 14:32:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 14:32:20,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:20,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:20,751 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 14:32:20,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 14:32:20,935 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-01-31 14:32:20,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:20,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695809886] [2022-01-31 14:32:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:20,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:20,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:20,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104447381] [2022-01-31 14:32:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:20,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:20,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:20,969 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 14:32:21,032 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 14:32:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:21,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:32:21,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:21,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:21,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:21,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695809886] [2022-01-31 14:32:21,175 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:21,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104447381] [2022-01-31 14:32:21,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104447381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:21,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:21,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:32:21,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345430270] [2022-01-31 14:32:21,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:21,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:32:21,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:21,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:32:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:32:21,176 INFO L87 Difference]: Start difference. First operand 38 states and 48 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:21,215 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-01-31 14:32:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:32:21,216 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-01-31 14:32:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:21,217 INFO L225 Difference]: With dead ends: 40 [2022-01-31 14:32:21,217 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 14:32:21,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 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 14:32:21,220 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:21,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:32:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 14:32:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 14:32:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 14:32:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-31 14:32:21,235 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-01-31 14:32:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:21,235 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-31 14:32:21,236 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-31 14:32:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 14:32:21,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:21,244 INFO L514 BasicCegarLoop]: trace histogram [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 14:32:21,269 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 14:32:21,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:21,460 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-01-31 14:32:21,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870379197] [2022-01-31 14:32:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:21,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:21,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:21,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560033578] [2022-01-31 14:32:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:21,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:21,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:21,491 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 14:32:21,492 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 14:32:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:21,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 14:32:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 14:32:21,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:21,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870379197] [2022-01-31 14:32:21,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560033578] [2022-01-31 14:32:21,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560033578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:21,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:21,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 14:32:21,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482215249] [2022-01-31 14:32:21,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:21,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:32:21,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:21,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:32:21,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:32:21,888 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 14:32:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:22,098 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-01-31 14:32:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:32:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-01-31 14:32:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:22,099 INFO L225 Difference]: With dead ends: 66 [2022-01-31 14:32:22,099 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 14:32:22,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:32:22,100 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:22,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 290 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:32:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 14:32:22,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-01-31 14:32:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 14:32:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-01-31 14:32:22,105 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-01-31 14:32:22,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:22,105 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-01-31 14:32:22,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 14:32:22,105 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-01-31 14:32:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 14:32:22,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:22,106 INFO L514 BasicCegarLoop]: trace histogram [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 14:32:22,124 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 14:32:22,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:22,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-01-31 14:32:22,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:22,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463137290] [2022-01-31 14:32:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:22,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:22,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:22,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735943981] [2022-01-31 14:32:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:22,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:22,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:22,336 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 14:32:22,337 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 14:32:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:32:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:22,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:22,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:22,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463137290] [2022-01-31 14:32:22,584 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:22,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735943981] [2022-01-31 14:32:22,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735943981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:22,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:22,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 14:32:22,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065618815] [2022-01-31 14:32:22,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:22,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:32:22,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:32:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:32:22,602 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 14:32:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:22,710 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-01-31 14:32:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 14:32:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-01-31 14:32:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:22,712 INFO L225 Difference]: With dead ends: 144 [2022-01-31 14:32:22,712 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 14:32:22,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-31 14:32:22,713 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:22,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 286 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:32:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 14:32:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-01-31 14:32:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 14:32:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-01-31 14:32:22,720 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-01-31 14:32:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:22,720 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-01-31 14:32:22,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 14:32:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-01-31 14:32:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 14:32:22,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:22,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:22,740 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 14:32:22,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:22,938 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-01-31 14:32:22,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:22,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287441323] [2022-01-31 14:32:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:22,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:22,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:22,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484762692] [2022-01-31 14:32:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:22,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:22,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:22,965 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 14:32:22,965 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 14:32:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:23,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:32:23,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 14:32:23,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 14:32:23,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:23,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287441323] [2022-01-31 14:32:23,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:23,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484762692] [2022-01-31 14:32:23,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484762692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:23,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:23,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-01-31 14:32:23,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520680278] [2022-01-31 14:32:23,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:23,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:32:23,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:32:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:32:23,205 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:23,322 INFO L93 Difference]: Finished difference Result 175 states and 251 transitions. [2022-01-31 14:32:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:32:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-01-31 14:32:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:23,324 INFO L225 Difference]: With dead ends: 175 [2022-01-31 14:32:23,324 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 14:32:23,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 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 14:32:23,324 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 115 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:23,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 301 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:32:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 14:32:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-01-31 14:32:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 14:32:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-01-31 14:32:23,335 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-01-31 14:32:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:23,335 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-01-31 14:32:23,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-01-31 14:32:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 14:32:23,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:23,336 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-01-31 14:32:23,356 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 14:32:23,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:23,537 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:23,537 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-01-31 14:32:23,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:23,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297390027] [2022-01-31 14:32:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:23,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:23,547 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:23,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741806030] [2022-01-31 14:32:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:23,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:23,549 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 14:32:23,549 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 14:32:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 14:32:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 14:32:23,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:23,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:23,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297390027] [2022-01-31 14:32:23,827 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:23,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741806030] [2022-01-31 14:32:23,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741806030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:23,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:23,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 14:32:23,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076718252] [2022-01-31 14:32:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:23,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:32:23,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:32:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:32:23,828 INFO L87 Difference]: Start difference. First operand 132 states and 180 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 14:32:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:24,051 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2022-01-31 14:32:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:32:24,052 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-31 14:32:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:24,054 INFO L225 Difference]: With dead ends: 155 [2022-01-31 14:32:24,054 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 14:32:24,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-31 14:32:24,055 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:24,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 249 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:32:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 14:32:24,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-01-31 14:32:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 14:32:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-01-31 14:32:24,063 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-01-31 14:32:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:24,063 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-01-31 14:32:24,063 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 14:32:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-01-31 14:32:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 14:32:24,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:24,064 INFO L514 BasicCegarLoop]: trace histogram [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 14:32:24,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 14:32:24,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:24,283 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-01-31 14:32:24,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:24,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225785130] [2022-01-31 14:32:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:24,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:24,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:24,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155901751] [2022-01-31 14:32:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:24,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:24,303 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 14:32:24,308 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 14:32:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 14:32:24,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 14:32:24,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:24,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:24,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225785130] [2022-01-31 14:32:24,703 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155901751] [2022-01-31 14:32:24,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155901751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:24,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:24,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-01-31 14:32:24,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034717481] [2022-01-31 14:32:24,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:24,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 14:32:24,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:24,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 14:32:24,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:32:24,711 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:32:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:24,869 INFO L93 Difference]: Finished difference Result 177 states and 239 transitions. [2022-01-31 14:32:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 14:32:24,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-01-31 14:32:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:24,872 INFO L225 Difference]: With dead ends: 177 [2022-01-31 14:32:24,872 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 14:32:24,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:32:24,874 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 61 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:24,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 432 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:32:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 14:32:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-01-31 14:32:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 14:32:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-01-31 14:32:24,881 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-01-31 14:32:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:24,882 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-01-31 14:32:24,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:32:24,882 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-01-31 14:32:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 14:32:24,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:24,908 INFO L514 BasicCegarLoop]: trace histogram [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 14:32:24,926 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 14:32:25,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 14:32:25,110 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-01-31 14:32:25,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:25,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601024590] [2022-01-31 14:32:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:25,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:25,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725387600] [2022-01-31 14:32:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:25,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:25,160 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 14:32:25,205 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 14:32:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:25,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:32:25,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:25,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:25,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:25,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601024590] [2022-01-31 14:32:25,319 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:25,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725387600] [2022-01-31 14:32:25,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725387600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:25,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:25,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:32:25,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126374613] [2022-01-31 14:32:25,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:25,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:32:25,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:25,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:32:25,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:32:25,321 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:25,336 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-01-31 14:32:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:32:25,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-01-31 14:32:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:25,337 INFO L225 Difference]: With dead ends: 174 [2022-01-31 14:32:25,337 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 14:32:25,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:32:25,338 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:25,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:32:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 14:32:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-01-31 14:32:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 14:32:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-01-31 14:32:25,343 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-01-31 14:32:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:25,343 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-01-31 14:32:25,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:32:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-01-31 14:32:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 14:32:25,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:25,344 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:25,362 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 14:32:25,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 14:32:25,547 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-01-31 14:32:25,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:25,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313054775] [2022-01-31 14:32:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:25,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:25,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:25,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509755411] [2022-01-31 14:32:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:25,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:25,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:25,559 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 14:32:25,599 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 14:32:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:25,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:32:25,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 14:32:25,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:25,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:25,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313054775] [2022-01-31 14:32:25,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:25,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509755411] [2022-01-31 14:32:25,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509755411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:25,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:25,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:32:25,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211844034] [2022-01-31 14:32:25,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:25,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:32:25,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:32:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:32:25,704 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:32:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:25,744 INFO L93 Difference]: Finished difference Result 237 states and 331 transitions. [2022-01-31 14:32:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:32:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-01-31 14:32:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:25,745 INFO L225 Difference]: With dead ends: 237 [2022-01-31 14:32:25,745 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 14:32:25,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:32:25,746 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:25,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:32:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 14:32:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-01-31 14:32:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 14:32:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-01-31 14:32:25,752 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-01-31 14:32:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:25,753 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-01-31 14:32:25,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:32:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-01-31 14:32:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 14:32:25,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:25,753 INFO L514 BasicCegarLoop]: trace histogram [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 14:32:25,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 14:32:25,969 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,SelfDestructingSolverStorable10 [2022-01-31 14:32:25,970 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-01-31 14:32:25,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:25,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108271513] [2022-01-31 14:32:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:25,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:25,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:25,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858259331] [2022-01-31 14:32:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:25,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:25,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:26,010 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 14:32:26,012 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 14:32:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:26,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 14:32:26,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:26,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:26,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:26,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108271513] [2022-01-31 14:32:26,358 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:26,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858259331] [2022-01-31 14:32:26,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858259331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:26,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:26,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 14:32:26,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947952262] [2022-01-31 14:32:26,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:26,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:32:26,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:32:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:32:26,360 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 14:32:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:26,985 INFO L93 Difference]: Finished difference Result 390 states and 576 transitions. [2022-01-31 14:32:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 14:32:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-01-31 14:32:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:26,988 INFO L225 Difference]: With dead ends: 390 [2022-01-31 14:32:26,988 INFO L226 Difference]: Without dead ends: 390 [2022-01-31 14:32:26,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-31 14:32:26,988 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:26,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 438 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 14:32:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-31 14:32:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-01-31 14:32:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 14:32:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-01-31 14:32:27,001 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-01-31 14:32:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:27,001 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-01-31 14:32:27,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 14:32:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-01-31 14:32:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 14:32:27,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:27,002 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:27,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 14:32:27,218 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,SelfDestructingSolverStorable11 [2022-01-31 14:32:27,218 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-01-31 14:32:27,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:27,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018528915] [2022-01-31 14:32:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:27,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:27,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361872213] [2022-01-31 14:32:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:27,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:27,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:27,227 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 14:32:27,228 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 14:32:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:27,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:32:27,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 14:32:27,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:27,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:27,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018528915] [2022-01-31 14:32:27,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:27,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361872213] [2022-01-31 14:32:27,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361872213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:27,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:27,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:32:27,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778905114] [2022-01-31 14:32:27,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:27,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:32:27,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:27,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:32:27,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:32:27,338 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 14:32:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:27,373 INFO L93 Difference]: Finished difference Result 564 states and 884 transitions. [2022-01-31 14:32:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:32:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 44 [2022-01-31 14:32:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:27,375 INFO L225 Difference]: With dead ends: 564 [2022-01-31 14:32:27,375 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 14:32:27,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:32:27,376 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:27,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:32:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 14:32:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-01-31 14:32:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-01-31 14:32:27,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-01-31 14:32:27,391 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-01-31 14:32:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:27,391 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-01-31 14:32:27,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 14:32:27,391 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-01-31 14:32:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 14:32:27,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:27,392 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2022-01-31 14:32:27,410 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 14:32:27,608 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,SelfDestructingSolverStorable12 [2022-01-31 14:32:27,608 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:27,609 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-01-31 14:32:27,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:27,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862121014] [2022-01-31 14:32:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:27,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:27,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:27,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280174937] [2022-01-31 14:32:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:27,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:27,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:27,620 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 14:32:27,621 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 14:32:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 14:32:27,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 14:32:27,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 14:32:27,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:27,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862121014] [2022-01-31 14:32:27,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:27,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280174937] [2022-01-31 14:32:27,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280174937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:27,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:27,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-31 14:32:27,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008442053] [2022-01-31 14:32:27,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:27,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 14:32:27,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 14:32:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:32:27,965 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 14:32:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:28,124 INFO L93 Difference]: Finished difference Result 770 states and 1118 transitions. [2022-01-31 14:32:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 14:32:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-01-31 14:32:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:28,129 INFO L225 Difference]: With dead ends: 770 [2022-01-31 14:32:28,129 INFO L226 Difference]: Without dead ends: 770 [2022-01-31 14:32:28,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-01-31 14:32:28,129 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 158 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:28,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 272 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:32:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-01-31 14:32:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-01-31 14:32:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-01-31 14:32:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-01-31 14:32:28,156 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-01-31 14:32:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:28,156 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-01-31 14:32:28,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 14:32:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-01-31 14:32:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 14:32:28,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:28,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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 14:32:28,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 14:32:28,371 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,SelfDestructingSolverStorable13 [2022-01-31 14:32:28,372 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-01-31 14:32:28,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:28,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858062266] [2022-01-31 14:32:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:28,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:28,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:28,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209686161] [2022-01-31 14:32:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:28,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:28,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:28,388 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 14:32:28,389 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 14:32:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:28,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 14:32:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:28,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:32:28,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858062266] [2022-01-31 14:32:28,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209686161] [2022-01-31 14:32:28,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209686161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:28,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:28,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 14:32:28,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027926935] [2022-01-31 14:32:28,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:28,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 14:32:28,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 14:32:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:32:28,664 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 14:32:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:28,879 INFO L93 Difference]: Finished difference Result 1119 states and 1584 transitions. [2022-01-31 14:32:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 14:32:28,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-01-31 14:32:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:28,883 INFO L225 Difference]: With dead ends: 1119 [2022-01-31 14:32:28,883 INFO L226 Difference]: Without dead ends: 1119 [2022-01-31 14:32:28,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-01-31 14:32:28,884 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 222 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:28,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 416 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:32:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-01-31 14:32:28,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-01-31 14:32:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-01-31 14:32:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-01-31 14:32:28,908 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-01-31 14:32:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:28,909 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-01-31 14:32:28,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 14:32:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-01-31 14:32:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 14:32:28,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:28,909 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:28,934 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 14:32:29,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:29,126 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-01-31 14:32:29,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:29,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789076798] [2022-01-31 14:32:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:29,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:29,134 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:29,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746717881] [2022-01-31 14:32:29,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:32:29,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:29,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:29,136 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 14:32:29,159 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 14:32:29,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:32:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:32:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:32:29,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 14:32:29,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:29,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789076798] [2022-01-31 14:32:29,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746717881] [2022-01-31 14:32:29,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746717881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:29,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:29,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:32:29,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242448613] [2022-01-31 14:32:29,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:29,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:32:29,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:32:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:32:29,264 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 14:32:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:29,321 INFO L93 Difference]: Finished difference Result 1234 states and 1815 transitions. [2022-01-31 14:32:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:32:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-01-31 14:32:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:29,325 INFO L225 Difference]: With dead ends: 1234 [2022-01-31 14:32:29,325 INFO L226 Difference]: Without dead ends: 1234 [2022-01-31 14:32:29,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 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 14:32:29,326 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:29,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 195 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:32:29,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-01-31 14:32:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-01-31 14:32:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-01-31 14:32:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-01-31 14:32:29,352 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-01-31 14:32:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:29,352 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-01-31 14:32:29,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 14:32:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-01-31 14:32:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 14:32:29,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:29,353 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:29,371 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 14:32:29,567 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,SelfDestructingSolverStorable15 [2022-01-31 14:32:29,567 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-01-31 14:32:29,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:29,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883347601] [2022-01-31 14:32:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:29,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:29,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:29,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318976603] [2022-01-31 14:32:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:29,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:29,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:29,576 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 14:32:29,607 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 14:32:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:29,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 14:32:29,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 14:32:30,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 14:32:31,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:31,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883347601] [2022-01-31 14:32:31,717 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:31,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318976603] [2022-01-31 14:32:31,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318976603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:31,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:31,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-01-31 14:32:31,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148742580] [2022-01-31 14:32:31,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:31,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 14:32:31,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:31,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 14:32:31,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-31 14:32:31,719 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-31 14:32:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:37,226 INFO L93 Difference]: Finished difference Result 1410 states and 2007 transitions. [2022-01-31 14:32:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 14:32:37,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-01-31 14:32:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:37,231 INFO L225 Difference]: With dead ends: 1410 [2022-01-31 14:32:37,231 INFO L226 Difference]: Without dead ends: 1404 [2022-01-31 14:32:37,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 14:32:37,232 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 175 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:37,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 644 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-31 14:32:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-01-31 14:32:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-01-31 14:32:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-01-31 14:32:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-01-31 14:32:37,315 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-01-31 14:32:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:37,315 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-01-31 14:32:37,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-31 14:32:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-01-31 14:32:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 14:32:37,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:37,316 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2022-01-31 14:32:37,341 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 14:32:37,539 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,SelfDestructingSolverStorable16 [2022-01-31 14:32:37,539 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:37,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-01-31 14:32:37,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:37,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082410140] [2022-01-31 14:32:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:37,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:37,550 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:37,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050757634] [2022-01-31 14:32:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:37,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:37,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:37,563 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 14:32:37,565 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 14:32:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 14:32:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 14:32:37,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 14:32:37,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:37,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082410140] [2022-01-31 14:32:37,987 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:37,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050757634] [2022-01-31 14:32:37,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050757634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:37,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:37,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-31 14:32:37,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610346985] [2022-01-31 14:32:37,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:37,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 14:32:37,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 14:32:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 14:32:37,989 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 14:32:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:38,236 INFO L93 Difference]: Finished difference Result 2543 states and 3572 transitions. [2022-01-31 14:32:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 14:32:38,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-01-31 14:32:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:38,243 INFO L225 Difference]: With dead ends: 2543 [2022-01-31 14:32:38,244 INFO L226 Difference]: Without dead ends: 2543 [2022-01-31 14:32:38,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-01-31 14:32:38,244 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 370 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:38,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 510 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:32:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-01-31 14:32:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-01-31 14:32:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-01-31 14:32:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-01-31 14:32:38,289 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-01-31 14:32:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:38,290 INFO L470 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-01-31 14:32:38,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 14:32:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-01-31 14:32:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 14:32:38,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:38,291 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-01-31 14:32:38,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 14:32:38,507 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,SelfDestructingSolverStorable17 [2022-01-31 14:32:38,508 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:38,508 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-01-31 14:32:38,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:38,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59944844] [2022-01-31 14:32:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:38,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:38,513 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:38,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754614616] [2022-01-31 14:32:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:38,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:38,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:38,516 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 14:32:38,517 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 14:32:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:38,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 14:32:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-31 14:32:38,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-31 14:32:38,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:38,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59944844] [2022-01-31 14:32:38,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754614616] [2022-01-31 14:32:38,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754614616] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:32:38,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:32:38,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-01-31 14:32:38,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287095199] [2022-01-31 14:32:38,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:38,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:32:38,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:32:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:32:38,964 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 14:32:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:39,002 INFO L93 Difference]: Finished difference Result 2465 states and 3473 transitions. [2022-01-31 14:32:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:32:39,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 67 [2022-01-31 14:32:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:39,011 INFO L225 Difference]: With dead ends: 2465 [2022-01-31 14:32:39,011 INFO L226 Difference]: Without dead ends: 2465 [2022-01-31 14:32:39,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:32:39,012 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:39,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:32:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-01-31 14:32:39,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-01-31 14:32:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-01-31 14:32:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-01-31 14:32:39,067 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-01-31 14:32:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:39,068 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-01-31 14:32:39,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 14:32:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-01-31 14:32:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 14:32:39,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:39,068 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 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 14:32:39,087 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 14:32:39,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:39,285 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:39,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:39,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-01-31 14:32:39,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:39,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346164342] [2022-01-31 14:32:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:39,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:39,291 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:39,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462427731] [2022-01-31 14:32:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:39,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:39,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:39,297 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:32:39,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 14:32:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 14:32:39,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 14:32:39,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:32:39,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346164342] [2022-01-31 14:32:39,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462427731] [2022-01-31 14:32:39,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462427731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:32:39,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:32:39,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:32:39,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275344061] [2022-01-31 14:32:39,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:32:39,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:32:39,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:32:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:32:39,508 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 14:32:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:39,551 INFO L93 Difference]: Finished difference Result 2578 states and 3563 transitions. [2022-01-31 14:32:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:32:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-01-31 14:32:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:39,558 INFO L225 Difference]: With dead ends: 2578 [2022-01-31 14:32:39,558 INFO L226 Difference]: Without dead ends: 2578 [2022-01-31 14:32:39,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:32:39,559 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:39,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 159 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:32:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-01-31 14:32:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-01-31 14:32:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-01-31 14:32:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-01-31 14:32:39,613 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-01-31 14:32:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:39,613 INFO L470 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-01-31 14:32:39,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 14:32:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-01-31 14:32:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 14:32:39,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:39,614 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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 14:32:39,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 14:32:39,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:39,823 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-01-31 14:32:39,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:39,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176949806] [2022-01-31 14:32:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:39,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:39,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:39,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502007568] [2022-01-31 14:32:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:32:39,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:39,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:39,832 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:32:39,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 14:32:39,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:32:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:32:39,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-01-31 14:32:39,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 14:32:41,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 14:32:42,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176949806] [2022-01-31 14:32:42,059 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502007568] [2022-01-31 14:32:42,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502007568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:42,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:42,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-01-31 14:32:42,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919972933] [2022-01-31 14:32:42,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:42,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 14:32:42,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 14:32:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-31 14:32:42,060 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-01-31 14:32:51,404 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 14:32:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:55,975 INFO L93 Difference]: Finished difference Result 2867 states and 3884 transitions. [2022-01-31 14:32:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 14:32:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-01-31 14:32:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:55,986 INFO L225 Difference]: With dead ends: 2867 [2022-01-31 14:32:55,986 INFO L226 Difference]: Without dead ends: 2863 [2022-01-31 14:32:55,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 14:32:55,987 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 303 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 318 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:55,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 742 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 959 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2022-01-31 14:32:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-01-31 14:32:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-01-31 14:32:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-01-31 14:32:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-01-31 14:32:56,034 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-01-31 14:32:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:56,034 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-01-31 14:32:56,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-01-31 14:32:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-01-31 14:32:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 14:32:56,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:56,036 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-01-31 14:32:56,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 14:32:56,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-31 14:32:56,251 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-01-31 14:32:56,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:56,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307210153] [2022-01-31 14:32:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:56,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:56,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:56,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479714261] [2022-01-31 14:32:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:56,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:56,263 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:32:56,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 14:32:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:32:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-31 14:32:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-01-31 14:32:57,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:33:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-31 14:33:02,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:33:02,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307210153] [2022-01-31 14:33:02,667 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:33:02,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479714261] [2022-01-31 14:33:02,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479714261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:33:02,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:33:02,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-01-31 14:33:02,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854360550] [2022-01-31 14:33:02,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:33:02,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 14:33:02,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:33:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 14:33:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-01-31 14:33:02,669 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-31 14:33:13,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:17,887 WARN L534 Checker$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 14:33:32,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:42,845 WARN L534 Checker$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 14:33:47,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:58,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:00,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:03,170 WARN L534 Checker$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 14:34:11,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:13,825 WARN L534 Checker$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 14:34:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:34:21,329 INFO L93 Difference]: Finished difference Result 3357 states and 4523 transitions. [2022-01-31 14:34:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 14:34:21,331 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-01-31 14:34:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:34:21,341 INFO L225 Difference]: With dead ends: 3357 [2022-01-31 14:34:21,341 INFO L226 Difference]: Without dead ends: 3328 [2022-01-31 14:34:21,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=1782, Invalid=9138, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 14:34:21,344 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 390 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 491 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:34:21,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1316 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 1690 Invalid, 7 Unknown, 0 Unchecked, 31.2s Time] [2022-01-31 14:34:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2022-01-31 14:34:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 3022. [2022-01-31 14:34:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 2209 states have (on average 1.2928927116342237) internal successors, (2856), 2253 states have internal predecessors, (2856), 637 states have call successors, (637), 177 states have call predecessors, (637), 175 states have return successors, (630), 591 states have call predecessors, (630), 630 states have call successors, (630) [2022-01-31 14:34:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4123 transitions. [2022-01-31 14:34:21,422 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4123 transitions. Word has length 88 [2022-01-31 14:34:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:34:21,422 INFO L470 AbstractCegarLoop]: Abstraction has 3022 states and 4123 transitions. [2022-01-31 14:34:21,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-31 14:34:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4123 transitions. [2022-01-31 14:34:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 14:34:21,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:34:21,424 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-01-31 14:34:21,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 14:34:21,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-31 14:34:21,640 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:34:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:34:21,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-01-31 14:34:21,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:34:21,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358345885] [2022-01-31 14:34:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:21,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:34:21,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:34:21,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750634465] [2022-01-31 14:34:21,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:34:21,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:21,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:34:21,647 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:34:21,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 14:34:21,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 14:34:21,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:34:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 14:34:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:34:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-01-31 14:34:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:34:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-01-31 14:34:22,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:34:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358345885] [2022-01-31 14:34:22,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:34:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750634465] [2022-01-31 14:34:22,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750634465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:34:22,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:34:22,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-31 14:34:22,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283079418] [2022-01-31 14:34:22,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:34:22,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 14:34:22,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:34:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 14:34:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-31 14:34:22,428 INFO L87 Difference]: Start difference. First operand 3022 states and 4123 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-31 14:34:26,099 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:28,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:34:28,254 INFO L93 Difference]: Finished difference Result 3225 states and 4394 transitions. [2022-01-31 14:34:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 14:34:28,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-01-31 14:34:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:34:28,263 INFO L225 Difference]: With dead ends: 3225 [2022-01-31 14:34:28,263 INFO L226 Difference]: Without dead ends: 3215 [2022-01-31 14:34:28,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-01-31 14:34:28,263 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 107 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 126 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-01-31 14:34:28,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 632 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-01-31 14:34:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-01-31 14:34:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2949. [2022-01-31 14:34:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2141 states have (on average 1.2919196637085475) internal successors, (2766), 2180 states have internal predecessors, (2766), 632 states have call successors, (632), 177 states have call predecessors, (632), 175 states have return successors, (630), 591 states have call predecessors, (630), 630 states have call successors, (630) [2022-01-31 14:34:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4028 transitions. [2022-01-31 14:34:28,301 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4028 transitions. Word has length 97 [2022-01-31 14:34:28,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:34:28,301 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4028 transitions. [2022-01-31 14:34:28,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-31 14:34:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4028 transitions. [2022-01-31 14:34:28,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 14:34:28,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:34:28,302 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 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] [2022-01-31 14:34:28,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 14:34:28,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:28,518 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:34:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:34:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-01-31 14:34:28,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:34:28,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732212137] [2022-01-31 14:34:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:28,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:34:28,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:34:28,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796401039] [2022-01-31 14:34:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:28,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:34:28,540 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:34:28,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 14:34:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:34:28,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 14:34:28,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:34:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 14:34:28,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:34:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-31 14:34:29,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:34:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732212137] [2022-01-31 14:34:29,036 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:34:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796401039] [2022-01-31 14:34:29,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796401039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:34:29,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:34:29,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-31 14:34:29,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422461073] [2022-01-31 14:34:29,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:34:29,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 14:34:29,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:34:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 14:34:29,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 14:34:29,037 INFO L87 Difference]: Start difference. First operand 2949 states and 4028 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-31 14:34:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:34:29,557 INFO L93 Difference]: Finished difference Result 5495 states and 7503 transitions. [2022-01-31 14:34:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 14:34:29,558 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-01-31 14:34:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:34:29,581 INFO L225 Difference]: With dead ends: 5495 [2022-01-31 14:34:29,581 INFO L226 Difference]: Without dead ends: 5495 [2022-01-31 14:34:29,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 14:34:29,585 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 554 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 14:34:29,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 706 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 14:34:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-01-31 14:34:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5193. [2022-01-31 14:34:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5193 states, 3569 states have (on average 1.2754272905575792) internal successors, (4552), 3591 states have internal predecessors, (4552), 1317 states have call successors, (1317), 308 states have call predecessors, (1317), 306 states have return successors, (1315), 1293 states have call predecessors, (1315), 1315 states have call successors, (1315) [2022-01-31 14:34:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5193 states to 5193 states and 7184 transitions. [2022-01-31 14:34:29,684 INFO L78 Accepts]: Start accepts. Automaton has 5193 states and 7184 transitions. Word has length 98 [2022-01-31 14:34:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:34:29,685 INFO L470 AbstractCegarLoop]: Abstraction has 5193 states and 7184 transitions. [2022-01-31 14:34:29,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-31 14:34:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5193 states and 7184 transitions. [2022-01-31 14:34:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 14:34:29,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:34:29,686 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 14:34:29,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 14:34:29,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:29,902 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:34:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:34:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-01-31 14:34:29,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:34:29,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121446388] [2022-01-31 14:34:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:29,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:34:29,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:34:29,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166374822] [2022-01-31 14:34:29,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:34:29,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:29,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:34:29,911 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:34:29,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 14:34:29,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:34:29,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:34:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-01-31 14:34:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:34:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 14:34:30,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:34:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-01-31 14:34:31,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:34:31,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121446388] [2022-01-31 14:34:31,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:34:31,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166374822] [2022-01-31 14:34:31,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166374822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:34:31,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:34:31,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-01-31 14:34:31,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123347626] [2022-01-31 14:34:31,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:34:31,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 14:34:31,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:34:31,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 14:34:31,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-31 14:34:31,958 INFO L87 Difference]: Start difference. First operand 5193 states and 7184 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 14:34:36,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:40,420 WARN L534 Checker$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 14:34:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:34:41,029 INFO L93 Difference]: Finished difference Result 6201 states and 8562 transitions. [2022-01-31 14:34:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 14:34:41,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-01-31 14:34:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:34:41,041 INFO L225 Difference]: With dead ends: 6201 [2022-01-31 14:34:41,041 INFO L226 Difference]: Without dead ends: 6197 [2022-01-31 14:34:41,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 14:34:41,042 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 183 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 277 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-01-31 14:34:41,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1021 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1296 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-01-31 14:34:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6197 states. [2022-01-31 14:34:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6197 to 5573. [2022-01-31 14:34:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5573 states, 3768 states have (on average 1.28343949044586) internal successors, (4836), 3790 states have internal predecessors, (4836), 1473 states have call successors, (1473), 333 states have call predecessors, (1473), 331 states have return successors, (1471), 1449 states have call predecessors, (1471), 1471 states have call successors, (1471) [2022-01-31 14:34:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5573 states to 5573 states and 7780 transitions. [2022-01-31 14:34:41,113 INFO L78 Accepts]: Start accepts. Automaton has 5573 states and 7780 transitions. Word has length 108 [2022-01-31 14:34:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:34:41,113 INFO L470 AbstractCegarLoop]: Abstraction has 5573 states and 7780 transitions. [2022-01-31 14:34:41,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 14:34:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 5573 states and 7780 transitions. [2022-01-31 14:34:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 14:34:41,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:34:41,115 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 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] [2022-01-31 14:34:41,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 14:34:41,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 14:34:41,332 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:34:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:34:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-01-31 14:34:41,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:34:41,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687307291] [2022-01-31 14:34:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:41,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:34:41,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:34:41,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900454810] [2022-01-31 14:34:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:41,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:41,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:34:41,341 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:34:41,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 14:34:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:34:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 14:34:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:34:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 14:34:41,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:34:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-31 14:34:41,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:34:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687307291] [2022-01-31 14:34:41,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:34:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900454810] [2022-01-31 14:34:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900454810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:34:41,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:34:41,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 14:34:41,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423948846] [2022-01-31 14:34:41,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:34:41,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 14:34:41,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:34:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 14:34:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 14:34:41,880 INFO L87 Difference]: Start difference. First operand 5573 states and 7780 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-31 14:34:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:34:42,525 INFO L93 Difference]: Finished difference Result 6406 states and 8604 transitions. [2022-01-31 14:34:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 14:34:42,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-01-31 14:34:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:34:42,536 INFO L225 Difference]: With dead ends: 6406 [2022-01-31 14:34:42,536 INFO L226 Difference]: Without dead ends: 6406 [2022-01-31 14:34:42,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 14:34:42,537 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 616 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:34:42,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 797 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 14:34:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6406 states. [2022-01-31 14:34:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6406 to 6241. [2022-01-31 14:34:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6241 states, 4158 states have (on average 1.2092352092352092) internal successors, (5028), 4176 states have internal predecessors, (5028), 1705 states have call successors, (1705), 379 states have call predecessors, (1705), 377 states have return successors, (1703), 1685 states have call predecessors, (1703), 1703 states have call successors, (1703) [2022-01-31 14:34:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 8436 transitions. [2022-01-31 14:34:42,648 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 8436 transitions. Word has length 105 [2022-01-31 14:34:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:34:42,649 INFO L470 AbstractCegarLoop]: Abstraction has 6241 states and 8436 transitions. [2022-01-31 14:34:42,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-31 14:34:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 8436 transitions. [2022-01-31 14:34:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 14:34:42,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:34:42,651 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:34:42,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 14:34:42,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 14:34:42,867 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:34:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:34:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-01-31 14:34:42,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:34:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352853909] [2022-01-31 14:34:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:42,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:34:42,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:34:42,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715766506] [2022-01-31 14:34:42,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:34:42,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:42,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:34:42,887 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:34:42,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 14:34:42,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:34:42,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:34:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 14:34:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:34:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-31 14:34:43,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:34:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-01-31 14:34:43,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:34:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352853909] [2022-01-31 14:34:43,683 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:34:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715766506] [2022-01-31 14:34:43,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715766506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:34:43,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:34:43,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-01-31 14:34:43,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367678478] [2022-01-31 14:34:43,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:34:43,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 14:34:43,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:34:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 14:34:43,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 14:34:43,685 INFO L87 Difference]: Start difference. First operand 6241 states and 8436 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-01-31 14:34:44,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:34:44,396 INFO L93 Difference]: Finished difference Result 11483 states and 15928 transitions. [2022-01-31 14:34:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 14:34:44,397 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) Word has length 132 [2022-01-31 14:34:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:34:44,416 INFO L225 Difference]: With dead ends: 11483 [2022-01-31 14:34:44,417 INFO L226 Difference]: Without dead ends: 11483 [2022-01-31 14:34:44,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 14:34:44,418 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 1060 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:34:44,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 835 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 14:34:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11483 states. [2022-01-31 14:34:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11483 to 11014. [2022-01-31 14:34:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 7536 states have (on average 1.269108280254777) internal successors, (9564), 7621 states have internal predecessors, (9564), 2921 states have call successors, (2921), 558 states have call predecessors, (2921), 556 states have return successors, (2919), 2834 states have call predecessors, (2919), 2919 states have call successors, (2919) [2022-01-31 14:34:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 15404 transitions. [2022-01-31 14:34:44,602 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 15404 transitions. Word has length 132 [2022-01-31 14:34:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:34:44,603 INFO L470 AbstractCegarLoop]: Abstraction has 11014 states and 15404 transitions. [2022-01-31 14:34:44,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-01-31 14:34:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 15404 transitions. [2022-01-31 14:34:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 14:34:44,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:34:44,607 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:34:44,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-31 14:34:44,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 14:34:44,826 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:34:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:34:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2087386651, now seen corresponding path program 3 times [2022-01-31 14:34:44,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:34:44,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215360039] [2022-01-31 14:34:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:44,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:34:44,836 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:34:44,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682781902] [2022-01-31 14:34:44,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:34:44,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:34:44,838 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:34:44,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 14:34:44,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 14:34:44,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:34:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 14:34:44,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:34:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 368 proven. 21 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-01-31 14:34:45,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:34:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 120 proven. 21 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-01-31 14:34:45,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:34:45,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215360039] [2022-01-31 14:34:45,364 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:34:45,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682781902] [2022-01-31 14:34:45,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682781902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:34:45,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:34:45,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-01-31 14:34:45,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872596117] [2022-01-31 14:34:45,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:34:45,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 14:34:45,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:34:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 14:34:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 14:34:45,366 INFO L87 Difference]: Start difference. First operand 11014 states and 15404 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-01-31 14:34:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:34:45,632 INFO L93 Difference]: Finished difference Result 15821 states and 22729 transitions. [2022-01-31 14:34:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 14:34:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 165 [2022-01-31 14:34:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:34:45,682 INFO L225 Difference]: With dead ends: 15821 [2022-01-31 14:34:45,682 INFO L226 Difference]: Without dead ends: 15821 [2022-01-31 14:34:45,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:34:45,684 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 26 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:34:45,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 390 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:34:45,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15821 states. [2022-01-31 14:34:45,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15821 to 13127. [2022-01-31 14:34:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13127 states, 8822 states have (on average 1.2925640444343687) internal successors, (11403), 9001 states have internal predecessors, (11403), 3802 states have call successors, (3802), 504 states have call predecessors, (3802), 502 states have return successors, (3800), 3621 states have call predecessors, (3800), 3800 states have call successors, (3800) [2022-01-31 14:34:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13127 states to 13127 states and 19005 transitions. [2022-01-31 14:34:45,931 INFO L78 Accepts]: Start accepts. Automaton has 13127 states and 19005 transitions. Word has length 165 [2022-01-31 14:34:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:34:45,931 INFO L470 AbstractCegarLoop]: Abstraction has 13127 states and 19005 transitions. [2022-01-31 14:34:45,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-01-31 14:34:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13127 states and 19005 transitions. [2022-01-31 14:34:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 14:34:45,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:34:45,938 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:34:45,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-31 14:34:46,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 14:34:46,153 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:34:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:34:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1051070357, now seen corresponding path program 4 times [2022-01-31 14:34:46,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:34:46,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624410730] [2022-01-31 14:34:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:34:46,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:34:46,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:34:46,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99784822] [2022-01-31 14:34:46,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 14:34:46,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:34:46,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:34:46,168 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:34:46,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 14:34:46,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 14:34:46,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:34:46,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 127 conjunts are in the unsatisfiable core [2022-01-31 14:34:46,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:34:49,623 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:34:50,633 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:34:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 263 proven. 293 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-01-31 14:34:52,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:35:00,222 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:35:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 313 proven. 117 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2022-01-31 14:35:11,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:35:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624410730] [2022-01-31 14:35:11,598 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:35:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99784822] [2022-01-31 14:35:11,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99784822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:35:11,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:35:11,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21] total 45 [2022-01-31 14:35:11,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917059508] [2022-01-31 14:35:11,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:35:11,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 14:35:11,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:35:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 14:35:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1659, Unknown=5, NotChecked=0, Total=1980 [2022-01-31 14:35:11,600 INFO L87 Difference]: Start difference. First operand 13127 states and 19005 transitions. Second operand has 45 states, 40 states have (on average 2.8) internal successors, (112), 38 states have internal predecessors, (112), 20 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (53), 18 states have call predecessors, (53), 18 states have call successors, (53) [2022-01-31 14:36:11,810 WARN L228 SmtUtils]: Spent 51.41s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:36:13,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:36:15,817 WARN L534 Checker$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 14:36:17,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:36:19,825 WARN L534 Checker$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 14:36:21,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:37:31,781 WARN L228 SmtUtils]: Spent 1.07m on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:38:10,690 WARN L228 SmtUtils]: Spent 26.82s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:38:12,710 WARN L534 Checker$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 14:38:14,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:38:16,714 WARN L534 Checker$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 14:38:18,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:38:20,729 WARN L534 Checker$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 14:38:22,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:38:25,108 WARN L534 Checker$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 14:38:27,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:39:00,672 WARN L228 SmtUtils]: Spent 25.13s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:39:02,708 WARN L534 Checker$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 14:39:04,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:39:07,013 WARN L534 Checker$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 14:39:08,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:39:12,138 WARN L534 Checker$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 14:40:35,398 WARN L228 SmtUtils]: Spent 1.24m on a formula simplification that was a NOOP. DAG size: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:41:10,855 WARN L228 SmtUtils]: Spent 33.15s on a formula simplification. DAG size of input: 144 DAG size of output: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:42:25,807 WARN L228 SmtUtils]: Spent 1.07m on a formula simplification. DAG size of input: 126 DAG size of output: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:42:27,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:42:29,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:42:31,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:42:33,495 WARN L534 Checker$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 14:42:35,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:42:37,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:42:39,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:42:41,511 WARN L534 Checker$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 14:42:43,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:42:45,518 WARN L534 Checker$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 14:43:22,909 WARN L228 SmtUtils]: Spent 28.65s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:43:24,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:43:27,227 WARN L534 Checker$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 14:43:29,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:43:31,550 WARN L534 Checker$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 14:43:33,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:43:34,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:43:36,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:43:38,769 WARN L534 Checker$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 14:43:42,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:43:45,051 WARN L534 Checker$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 14:43:47,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:43:49,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:43:51,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:44:03,946 WARN L534 Checker$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 14:45:00,161 WARN L228 SmtUtils]: Spent 31.20s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:45:55,204 WARN L228 SmtUtils]: Spent 42.47s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:46:00,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:46:02,136 WARN L534 Checker$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 14:46:57,311 WARN L228 SmtUtils]: Spent 45.63s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:46:59,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:47:01,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []