/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 14:30:39,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 14:30:39,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 14:30:39,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 14:30:39,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 14:30:39,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 14:30:39,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 14:30:39,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 14:30:39,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 14:30:39,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 14:30:39,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 14:30:39,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 14:30:39,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 14:30:39,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 14:30:39,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 14:30:39,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 14:30:39,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 14:30:39,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 14:30:39,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 14:30:39,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 14:30:39,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 14:30:39,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 14:30:39,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 14:30:39,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 14:30:39,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 14:30:39,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 14:30:39,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 14:30:39,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 14:30:39,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 14:30:39,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 14:30:39,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 14:30:39,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 14:30:39,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 14:30:39,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 14:30:39,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 14:30:39,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 14:30:39,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 14:30:39,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 14:30:39,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 14:30:39,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 14:30:39,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 14:30:39,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 14:30:39,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 14:30:39,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 14:30:39,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 14:30:39,580 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 14:30:39,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 14:30:39,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 14:30:39,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 14:30:39,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 14:30:39,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 14:30:39,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 14:30:39,581 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 14:30:39,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 14:30:39,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 14:30:39,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 14:30:39,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 14:30:39,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 14:30:39,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 14:30:39,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 14:30:39,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:30:39,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 14:30:39,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 14:30:39,584 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 14:30:39,584 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 14:30:39,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 14:30:39,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 14:30:39,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 14:30:39,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 14:30:39,868 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 14:30:39,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-01-31 14:30:39,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c395a32a/2b8742da44de4420b98e81e38ae7e364/FLAGddd9d6151 [2022-01-31 14:30:40,361 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 14:30:40,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-01-31 14:30:40,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c395a32a/2b8742da44de4420b98e81e38ae7e364/FLAGddd9d6151 [2022-01-31 14:30:40,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c395a32a/2b8742da44de4420b98e81e38ae7e364 [2022-01-31 14:30:40,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 14:30:40,395 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 14:30:40,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 14:30:40,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 14:30:40,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 14:30:40,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49abc3c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40, skipping insertion in model container [2022-01-31 14:30:40,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 14:30:40,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 14:30:40,564 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_unwindbound20.c[490,503] [2022-01-31 14:30:40,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:30:40,587 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 14:30:40,596 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_unwindbound20.c[490,503] [2022-01-31 14:30:40,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:30:40,613 INFO L208 MainTranslator]: Completed translation [2022-01-31 14:30:40,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40 WrapperNode [2022-01-31 14:30:40,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 14:30:40,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 14:30:40,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 14:30:40,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 14:30:40,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 14:30:40,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 14:30:40,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 14:30:40,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 14:30:40,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:40,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:30:40,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:40,682 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 14:30:40,684 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 14:30:40,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 14:30:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 14:30:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 14:30:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 14:30:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 14:30:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 14:30:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 14:30:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 14:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 14:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 14:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 14:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 14:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 14:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 14:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 14:30:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 14:30:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 14:30:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 14:30:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 14:30:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 14:30:40,766 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 14:30:40,767 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 14:30:40,955 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 14:30:40,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 14:30:40,963 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 14:30:40,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:30:40 BoogieIcfgContainer [2022-01-31 14:30:40,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 14:30:40,986 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 14:30:40,986 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 14:30:40,987 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 14:30:40,992 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:30:40" (1/1) ... [2022-01-31 14:30:41,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:30:41 BasicIcfg [2022-01-31 14:30:41,023 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 14:30:41,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 14:30:41,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 14:30:41,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 14:30:41,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:30:40" (1/4) ... [2022-01-31 14:30:41,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59790057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:30:41, skipping insertion in model container [2022-01-31 14:30:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:30:40" (2/4) ... [2022-01-31 14:30:41,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59790057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:30:41, skipping insertion in model container [2022-01-31 14:30:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:30:40" (3/4) ... [2022-01-31 14:30:41,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59790057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:30:41, skipping insertion in model container [2022-01-31 14:30:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:30:41" (4/4) ... [2022-01-31 14:30:41,028 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.cJordan [2022-01-31 14:30:41,032 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 14:30:41,032 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 14:30:41,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 14:30:41,117 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 14:30:41,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 14:30:41,138 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 14:30:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 14:30:41,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:41,148 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 14:30:41,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:41,153 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-01-31 14:30:41,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:41,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864719996] [2022-01-31 14:30:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:41,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:41,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:30:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:41,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:30:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:41,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 14:30:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:41,381 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 14:30:41,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:41,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864719996] [2022-01-31 14:30:41,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864719996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:41,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:41,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 14:30:41,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314260549] [2022-01-31 14:30:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:41,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 14:30:41,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:41,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 14:30:41,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:30:41,421 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 14:30:41,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:41,520 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-01-31 14:30:41,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 14:30:41,522 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 14:30:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:41,531 INFO L225 Difference]: With dead ends: 41 [2022-01-31 14:30:41,531 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 14:30:41,533 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 14:30:41,537 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 14:30:41,538 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 14:30:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 14:30:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 14:30:41,566 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 14:30:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-01-31 14:30:41,570 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-01-31 14:30:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:41,570 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-01-31 14:30:41,571 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 14:30:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-01-31 14:30:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 14:30:41,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:41,573 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 14:30:41,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 14:30:41,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-01-31 14:30:41,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:41,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412131234] [2022-01-31 14:30:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:41,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:41,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:41,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558509447] [2022-01-31 14:30:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:41,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:41,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:41,612 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 14:30:41,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 14:30:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:30:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:41,790 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 14:30:41,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:41,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412131234] [2022-01-31 14:30:41,791 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558509447] [2022-01-31 14:30:41,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558509447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:41,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:41,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 14:30:41,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769162316] [2022-01-31 14:30:41,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:41,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 14:30:41,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 14:30:41,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:30:41,795 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 14:30:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:41,810 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-01-31 14:30:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 14:30:41,812 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 14:30:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:41,813 INFO L225 Difference]: With dead ends: 37 [2022-01-31 14:30:41,813 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 14:30:41,813 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 14:30:41,815 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 14:30:41,815 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 14:30:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 14:30:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 14:30:41,820 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 14:30:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-01-31 14:30:41,822 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-01-31 14:30:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:41,823 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-01-31 14:30:41,823 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 14:30:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-01-31 14:30:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 14:30:41,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:41,824 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 14:30:41,850 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 14:30:42,041 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 14:30:42,042 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:42,042 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-01-31 14:30:42,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:42,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178033687] [2022-01-31 14:30:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:42,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:42,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:42,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992075585] [2022-01-31 14:30:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:42,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:42,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:42,058 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 14:30:42,068 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 14:30:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:30:42,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:42,213 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 14:30:42,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:42,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:42,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178033687] [2022-01-31 14:30:42,214 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:42,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992075585] [2022-01-31 14:30:42,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992075585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:42,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:42,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:30:42,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60565182] [2022-01-31 14:30:42,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:42,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:30:42,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:30:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:30:42,216 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 14:30:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:42,267 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-01-31 14:30:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:30:42,268 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 14:30:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:42,269 INFO L225 Difference]: With dead ends: 50 [2022-01-31 14:30:42,269 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 14:30:42,270 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 14:30:42,271 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:30:42,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:30:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 14:30:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-01-31 14:30:42,277 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 14:30:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-01-31 14:30:42,278 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-01-31 14:30:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:42,278 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-01-31 14:30:42,279 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 14:30:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-01-31 14:30:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 14:30:42,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:42,280 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 14:30:42,310 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 14:30:42,507 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 14:30:42,508 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-01-31 14:30:42,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:42,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024167661] [2022-01-31 14:30:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:42,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:42,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:42,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855789199] [2022-01-31 14:30:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:42,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:42,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:42,527 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 14:30:42,529 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 14:30:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:42,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:30:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:42,663 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 14:30:42,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:42,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:42,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024167661] [2022-01-31 14:30:42,663 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855789199] [2022-01-31 14:30:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855789199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:42,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:42,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:30:42,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866364166] [2022-01-31 14:30:42,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:42,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:30:42,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:42,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:30:42,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:30:42,665 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 14:30:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:42,685 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-01-31 14:30:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:30:42,686 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 14:30:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:42,686 INFO L225 Difference]: With dead ends: 40 [2022-01-31 14:30:42,686 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 14:30:42,687 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 14:30:42,688 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 14:30:42,688 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 14:30:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 14:30:42,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 14:30:42,692 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 14:30:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-31 14:30:42,693 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-01-31 14:30:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:42,693 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-31 14:30:42,694 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 14:30:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-31 14:30:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 14:30:42,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:42,695 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 14:30:42,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 14:30:42,915 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 14:30:42,916 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-01-31 14:30:42,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:42,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572474326] [2022-01-31 14:30:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:42,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:42,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:42,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949985985] [2022-01-31 14:30:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:42,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:42,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:42,933 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 14:30:42,936 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 14:30:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:42,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 14:30:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:43,281 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 14:30:43,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:43,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572474326] [2022-01-31 14:30:43,282 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949985985] [2022-01-31 14:30:43,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949985985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:43,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:43,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 14:30:43,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933002987] [2022-01-31 14:30:43,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:43,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:30:43,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:30:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:30:43,287 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 14:30:43,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:43,487 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-01-31 14:30:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:30:43,488 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 14:30:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:43,489 INFO L225 Difference]: With dead ends: 66 [2022-01-31 14:30:43,489 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 14:30:43,490 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 14:30:43,491 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 14:30:43,491 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 14:30:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 14:30:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-01-31 14:30:43,498 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 14:30:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-01-31 14:30:43,499 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-01-31 14:30:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:43,500 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-01-31 14:30:43,500 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 14:30:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-01-31 14:30:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 14:30:43,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:43,501 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 14:30:43,518 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 14:30:43,707 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 14:30:43,707 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-01-31 14:30:43,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:43,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275025235] [2022-01-31 14:30:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:43,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:43,722 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:43,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252152613] [2022-01-31 14:30:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:43,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:43,728 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 14:30:43,739 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 14:30:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:30:43,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:43,840 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 14:30:43,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:43,933 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 14:30:43,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:43,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275025235] [2022-01-31 14:30:43,933 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:43,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252152613] [2022-01-31 14:30:43,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252152613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:43,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:43,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 14:30:43,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223052796] [2022-01-31 14:30:43,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:43,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:30:43,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:30:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:30:43,935 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 14:30:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:44,053 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-01-31 14:30:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 14:30:44,054 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 14:30:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:44,056 INFO L225 Difference]: With dead ends: 144 [2022-01-31 14:30:44,056 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 14:30:44,056 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 14:30:44,057 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 14:30:44,058 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 14:30:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 14:30:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-01-31 14:30:44,069 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 14:30:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-01-31 14:30:44,070 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-01-31 14:30:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:44,071 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-01-31 14:30:44,071 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 14:30:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-01-31 14:30:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 14:30:44,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:44,072 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 14:30:44,094 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 14:30:44,287 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 14:30:44,287 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-01-31 14:30:44,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:44,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144802210] [2022-01-31 14:30:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:44,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:44,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:44,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317359702] [2022-01-31 14:30:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:44,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:44,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:44,301 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 14:30:44,319 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 14:30:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:30:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:44,450 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 14:30:44,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:44,547 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 14:30:44,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:44,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144802210] [2022-01-31 14:30:44,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:44,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317359702] [2022-01-31 14:30:44,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317359702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:44,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:44,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-01-31 14:30:44,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991009786] [2022-01-31 14:30:44,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:44,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:30:44,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:44,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:30:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:30:44,550 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 14:30:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:44,695 INFO L93 Difference]: Finished difference Result 175 states and 251 transitions. [2022-01-31 14:30:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:30:44,696 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 14:30:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:44,697 INFO L225 Difference]: With dead ends: 175 [2022-01-31 14:30:44,697 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 14:30:44,698 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 14:30:44,698 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 14:30:44,699 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 14:30:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 14:30:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-01-31 14:30:44,710 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 14:30:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-01-31 14:30:44,712 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-01-31 14:30:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:44,712 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-01-31 14:30:44,712 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 14:30:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-01-31 14:30:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 14:30:44,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:44,713 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 14:30:44,737 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 14:30:44,931 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 14:30:44,931 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-01-31 14:30:44,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:44,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752529969] [2022-01-31 14:30:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:44,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:44,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090171387] [2022-01-31 14:30:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:44,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:44,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:44,954 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 14:30:44,955 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 14:30:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 14:30:44,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:45,213 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 14:30:45,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:45,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:45,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752529969] [2022-01-31 14:30:45,214 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:45,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090171387] [2022-01-31 14:30:45,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090171387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:45,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:45,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 14:30:45,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383090647] [2022-01-31 14:30:45,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:45,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:30:45,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:30:45,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:30:45,216 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 14:30:45,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:45,378 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2022-01-31 14:30:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:30:45,378 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 14:30:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:45,380 INFO L225 Difference]: With dead ends: 155 [2022-01-31 14:30:45,380 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 14:30:45,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-31 14:30:45,381 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 14:30:45,381 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 14:30:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 14:30:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-01-31 14:30:45,389 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 14:30:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-01-31 14:30:45,390 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-01-31 14:30:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:45,391 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-01-31 14:30:45,391 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 14:30:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-01-31 14:30:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 14:30:45,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:45,392 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 14:30:45,421 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 14:30:45,611 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 14:30:45,612 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-01-31 14:30:45,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:45,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135156455] [2022-01-31 14:30:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:45,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:45,622 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:45,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186752358] [2022-01-31 14:30:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:45,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:45,624 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 14:30:45,629 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 14:30:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 14:30:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:45,910 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 14:30:45,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:46,051 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 14:30:46,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:46,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135156455] [2022-01-31 14:30:46,052 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:46,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186752358] [2022-01-31 14:30:46,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186752358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:46,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:46,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-01-31 14:30:46,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161415214] [2022-01-31 14:30:46,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:46,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 14:30:46,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 14:30:46,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:30:46,054 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 14:30:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:46,191 INFO L93 Difference]: Finished difference Result 177 states and 239 transitions. [2022-01-31 14:30:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 14:30:46,192 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 14:30:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:46,193 INFO L225 Difference]: With dead ends: 177 [2022-01-31 14:30:46,193 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 14:30:46,194 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 14:30:46,194 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 14:30:46,194 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 14:30:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 14:30:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-01-31 14:30:46,202 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 14:30:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-01-31 14:30:46,203 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-01-31 14:30:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:46,203 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-01-31 14:30:46,204 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 14:30:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-01-31 14:30:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 14:30:46,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:46,205 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 14:30:46,233 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 14:30:46,427 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 14:30:46,427 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-01-31 14:30:46,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410705046] [2022-01-31 14:30:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:46,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:46,439 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:46,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390522836] [2022-01-31 14:30:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:46,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:46,446 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 14:30:46,446 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 14:30:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:46,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:30:46,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:46,562 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 14:30:46,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:46,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:46,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410705046] [2022-01-31 14:30:46,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:46,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390522836] [2022-01-31 14:30:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390522836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:46,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:46,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:30:46,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804020403] [2022-01-31 14:30:46,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:46,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:30:46,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:30:46,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:30:46,565 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 14:30:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:46,588 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-01-31 14:30:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:30:46,588 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 14:30:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:46,589 INFO L225 Difference]: With dead ends: 174 [2022-01-31 14:30:46,589 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 14:30:46,590 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 14:30:46,590 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 14:30:46,590 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 14:30:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 14:30:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-01-31 14:30:46,597 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 14:30:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-01-31 14:30:46,598 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-01-31 14:30:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:46,598 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-01-31 14:30:46,598 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 14:30:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-01-31 14:30:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 14:30:46,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:46,599 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 14:30:46,619 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 14:30:46,811 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 14:30:46,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:46,812 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-01-31 14:30:46,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:46,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351912252] [2022-01-31 14:30:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:46,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:46,821 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:46,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162314708] [2022-01-31 14:30:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:46,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:46,823 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 14:30:46,833 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 14:30:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:30:46,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:46,953 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 14:30:46,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:46,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351912252] [2022-01-31 14:30:46,953 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162314708] [2022-01-31 14:30:46,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162314708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:46,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:46,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:30:46,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418219103] [2022-01-31 14:30:46,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:46,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:30:46,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:30:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:30:46,955 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 14:30:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:46,989 INFO L93 Difference]: Finished difference Result 237 states and 331 transitions. [2022-01-31 14:30:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:30:46,989 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 14:30:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:46,991 INFO L225 Difference]: With dead ends: 237 [2022-01-31 14:30:46,991 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 14:30:46,991 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 14:30:46,992 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 14:30:46,992 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 14:30:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 14:30:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-01-31 14:30:46,998 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 14:30:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-01-31 14:30:46,999 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-01-31 14:30:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:46,999 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-01-31 14:30:46,999 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 14:30:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-01-31 14:30:47,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 14:30:47,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:47,000 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 14:30:47,025 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 14:30:47,219 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 14:30:47,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:47,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-01-31 14:30:47,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:47,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171030341] [2022-01-31 14:30:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:47,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:47,229 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:47,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864719923] [2022-01-31 14:30:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:47,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:47,231 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 14:30:47,232 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 14:30:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:47,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 14:30:47,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:47,483 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 14:30:47,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:47,613 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 14:30:47,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:47,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171030341] [2022-01-31 14:30:47,613 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:47,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864719923] [2022-01-31 14:30:47,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864719923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:47,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:47,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 14:30:47,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129202223] [2022-01-31 14:30:47,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:47,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:30:47,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:30:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:30:47,615 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 14:30:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:48,382 INFO L93 Difference]: Finished difference Result 390 states and 576 transitions. [2022-01-31 14:30:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 14:30:48,383 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 14:30:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:48,385 INFO L225 Difference]: With dead ends: 390 [2022-01-31 14:30:48,385 INFO L226 Difference]: Without dead ends: 390 [2022-01-31 14:30:48,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-31 14:30:48,386 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 14:30:48,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 438 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 14:30:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-31 14:30:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-01-31 14:30:48,398 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 14:30:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-01-31 14:30:48,400 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-01-31 14:30:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:48,400 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-01-31 14:30:48,401 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 14:30:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-01-31 14:30:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 14:30:48,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:48,401 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 14:30:48,424 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 14:30:48,619 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 14:30:48,619 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-01-31 14:30:48,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:48,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799903384] [2022-01-31 14:30:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:48,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:48,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:48,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333582674] [2022-01-31 14:30:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:48,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:48,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:48,629 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 14:30:48,639 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 14:30:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:30:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:48,760 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 14:30:48,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:48,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799903384] [2022-01-31 14:30:48,761 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333582674] [2022-01-31 14:30:48,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333582674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:48,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:48,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:30:48,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377669410] [2022-01-31 14:30:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:48,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:30:48,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:30:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:30:48,762 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 14:30:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:48,798 INFO L93 Difference]: Finished difference Result 564 states and 884 transitions. [2022-01-31 14:30:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:30:48,799 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 14:30:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:48,804 INFO L225 Difference]: With dead ends: 564 [2022-01-31 14:30:48,804 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 14:30:48,804 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 14:30:48,805 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 14:30:48,805 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 14:30:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 14:30:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-01-31 14:30:48,828 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 14:30:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-01-31 14:30:48,831 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-01-31 14:30:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:48,831 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-01-31 14:30:48,832 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 14:30:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-01-31 14:30:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 14:30:48,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:48,832 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 14:30:48,859 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 14:30:49,048 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 14:30:49,048 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:49,048 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-01-31 14:30:49,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:49,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844638122] [2022-01-31 14:30:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:49,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:49,057 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:49,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952725124] [2022-01-31 14:30:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:49,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:49,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:49,058 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 14:30:49,070 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 14:30:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 14:30:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:49,206 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 14:30:49,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:49,317 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 14:30:49,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844638122] [2022-01-31 14:30:49,318 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952725124] [2022-01-31 14:30:49,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952725124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:49,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:49,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-31 14:30:49,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396732222] [2022-01-31 14:30:49,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:49,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 14:30:49,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 14:30:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:30:49,321 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 14:30:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:49,486 INFO L93 Difference]: Finished difference Result 770 states and 1118 transitions. [2022-01-31 14:30:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 14:30:49,487 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 14:30:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:49,492 INFO L225 Difference]: With dead ends: 770 [2022-01-31 14:30:49,492 INFO L226 Difference]: Without dead ends: 770 [2022-01-31 14:30:49,492 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 14:30:49,493 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 14:30:49,493 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 14:30:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-01-31 14:30:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-01-31 14:30:49,516 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 14:30:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-01-31 14:30:49,520 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-01-31 14:30:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:49,520 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-01-31 14:30:49,521 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 14:30:49,521 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-01-31 14:30:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 14:30:49,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:49,521 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 14:30:49,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 14:30:49,743 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 14:30:49,743 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:49,744 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-01-31 14:30:49,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:49,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109637581] [2022-01-31 14:30:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:49,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:49,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:49,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834439039] [2022-01-31 14:30:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:49,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:49,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:49,760 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 14:30:49,781 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 14:30:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 14:30:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:49,912 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 14:30:49,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:50,039 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 14:30:50,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:50,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109637581] [2022-01-31 14:30:50,039 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:50,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834439039] [2022-01-31 14:30:50,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834439039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:50,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:50,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 14:30:50,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232724759] [2022-01-31 14:30:50,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 14:30:50,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 14:30:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:30:50,041 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 14:30:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:50,266 INFO L93 Difference]: Finished difference Result 1119 states and 1584 transitions. [2022-01-31 14:30:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 14:30:50,268 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 14:30:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:50,272 INFO L225 Difference]: With dead ends: 1119 [2022-01-31 14:30:50,272 INFO L226 Difference]: Without dead ends: 1119 [2022-01-31 14:30:50,273 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 14:30:50,273 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 14:30:50,273 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 14:30:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-01-31 14:30:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-01-31 14:30:50,301 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 14:30:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-01-31 14:30:50,306 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-01-31 14:30:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:50,306 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-01-31 14:30:50,307 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 14:30:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-01-31 14:30:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 14:30:50,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:50,307 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 14:30:50,332 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 14:30:50,521 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 14:30:50,521 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-01-31 14:30:50,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:50,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874746360] [2022-01-31 14:30:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:50,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:50,530 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:50,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525469920] [2022-01-31 14:30:50,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:30:50,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:50,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:50,531 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 14:30:50,533 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 14:30:50,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:30:50,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:30:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:30:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:50,653 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 14:30:50,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:50,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874746360] [2022-01-31 14:30:50,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525469920] [2022-01-31 14:30:50,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525469920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:50,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:50,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:30:50,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770938987] [2022-01-31 14:30:50,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:50,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:30:50,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:30:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:30:50,655 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 14:30:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:50,724 INFO L93 Difference]: Finished difference Result 1234 states and 1815 transitions. [2022-01-31 14:30:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:30:50,725 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 14:30:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:50,730 INFO L225 Difference]: With dead ends: 1234 [2022-01-31 14:30:50,730 INFO L226 Difference]: Without dead ends: 1234 [2022-01-31 14:30:50,730 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 14:30:50,731 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 14:30:50,731 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 14:30:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-01-31 14:30:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-01-31 14:30:50,761 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 14:30:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-01-31 14:30:50,766 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-01-31 14:30:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:50,766 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-01-31 14:30:50,766 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 14:30:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-01-31 14:30:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 14:30:50,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:50,767 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 14:30:50,792 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 14:30:50,984 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 14:30:50,984 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-01-31 14:30:50,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:50,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231178096] [2022-01-31 14:30:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:50,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:50,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:50,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588795190] [2022-01-31 14:30:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:50,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:50,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:50,994 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 14:30:50,995 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 14:30:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:51,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 14:30:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:51,661 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 14:30:51,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:52,416 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 14:30:52,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:52,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231178096] [2022-01-31 14:30:52,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:52,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588795190] [2022-01-31 14:30:52,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588795190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:52,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:52,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-01-31 14:30:52,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710031351] [2022-01-31 14:30:52,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:52,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 14:30:52,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:52,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 14:30:52,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-31 14:30:52,418 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 14:30:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:56,622 INFO L93 Difference]: Finished difference Result 1410 states and 2007 transitions. [2022-01-31 14:30:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 14:30:56,622 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 14:30:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:56,628 INFO L225 Difference]: With dead ends: 1410 [2022-01-31 14:30:56,628 INFO L226 Difference]: Without dead ends: 1404 [2022-01-31 14:30:56,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 14:30:56,629 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 175 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:30:56,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 644 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 14:30:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-01-31 14:30:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-01-31 14:30:56,662 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 14:30:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-01-31 14:30:56,666 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-01-31 14:30:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:56,666 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-01-31 14:30:56,666 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 14:30:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-01-31 14:30:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 14:30:56,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:56,667 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 14:30:56,693 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 14:30:56,885 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 14:30:56,886 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-01-31 14:30:56,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491673004] [2022-01-31 14:30:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:56,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:56,893 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:56,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456753404] [2022-01-31 14:30:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:56,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:56,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:56,895 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 14:30:56,896 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 14:30:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:56,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 14:30:56,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:57,082 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 14:30:57,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:57,252 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 14:30:57,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:57,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491673004] [2022-01-31 14:30:57,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:57,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456753404] [2022-01-31 14:30:57,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456753404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:57,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:57,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-31 14:30:57,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368241514] [2022-01-31 14:30:57,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:57,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 14:30:57,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 14:30:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 14:30:57,254 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 14:30:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:57,636 INFO L93 Difference]: Finished difference Result 2543 states and 3572 transitions. [2022-01-31 14:30:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 14:30:57,636 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 14:30:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:57,645 INFO L225 Difference]: With dead ends: 2543 [2022-01-31 14:30:57,645 INFO L226 Difference]: Without dead ends: 2543 [2022-01-31 14:30:57,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-01-31 14:30:57,646 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 370 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 14:30:57,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 510 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 14:30:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-01-31 14:30:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-01-31 14:30:57,700 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 14:30:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-01-31 14:30:57,708 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-01-31 14:30:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:57,708 INFO L470 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-01-31 14:30:57,708 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 14:30:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-01-31 14:30:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 14:30:57,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:57,709 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 14:30:57,738 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 14:30:57,927 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 14:30:57,928 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-01-31 14:30:57,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:57,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386069999] [2022-01-31 14:30:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:57,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:57,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:57,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006142407] [2022-01-31 14:30:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:57,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:57,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:57,944 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 14:30:57,966 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 14:30:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 14:30:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:58,207 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 14:30:58,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:58,345 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 14:30:58,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:58,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386069999] [2022-01-31 14:30:58,345 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006142407] [2022-01-31 14:30:58,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006142407] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:30:58,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:30:58,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-01-31 14:30:58,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342865929] [2022-01-31 14:30:58,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:58,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:30:58,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:58,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:30:58,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:30:58,347 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 14:30:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:58,386 INFO L93 Difference]: Finished difference Result 2465 states and 3473 transitions. [2022-01-31 14:30:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:30:58,387 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 14:30:58,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:58,395 INFO L225 Difference]: With dead ends: 2465 [2022-01-31 14:30:58,396 INFO L226 Difference]: Without dead ends: 2465 [2022-01-31 14:30:58,396 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 14:30:58,396 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 14:30:58,397 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 14:30:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-01-31 14:30:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-01-31 14:30:58,450 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 14:30:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-01-31 14:30:58,459 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-01-31 14:30:58,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:58,459 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-01-31 14:30:58,460 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 14:30:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-01-31 14:30:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 14:30:58,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:58,464 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 14:30:58,486 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 14:30:58,678 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 14:30:58,679 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-01-31 14:30:58,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:58,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943084489] [2022-01-31 14:30:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:58,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:58,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:58,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439642205] [2022-01-31 14:30:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:58,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:58,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:58,689 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 14:30:58,691 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 14:30:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:30:58,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 14:30:58,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:30:58,828 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 14:30:58,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:30:58,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943084489] [2022-01-31 14:30:58,829 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439642205] [2022-01-31 14:30:58,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439642205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:30:58,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:30:58,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:30:58,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770475514] [2022-01-31 14:30:58,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:30:58,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:30:58,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:30:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:30:58,830 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 14:30:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:30:58,876 INFO L93 Difference]: Finished difference Result 2578 states and 3563 transitions. [2022-01-31 14:30:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:30:58,882 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 14:30:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:30:58,893 INFO L225 Difference]: With dead ends: 2578 [2022-01-31 14:30:58,893 INFO L226 Difference]: Without dead ends: 2578 [2022-01-31 14:30:58,894 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 14:30:58,894 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 14:30:58,895 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 14:30:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-01-31 14:30:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-01-31 14:30:58,978 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 14:30:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-01-31 14:30:58,984 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-01-31 14:30:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:30:58,984 INFO L470 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-01-31 14:30:58,984 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 14:30:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-01-31 14:30:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 14:30:58,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:30:58,985 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 14:30:59,008 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 14:30:59,205 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 14:30:59,205 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:30:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:30:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-01-31 14:30:59,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:30:59,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381124575] [2022-01-31 14:30:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:30:59,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:30:59,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:30:59,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939579241] [2022-01-31 14:30:59,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:30:59,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:30:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:30:59,216 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 14:30:59,220 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 14:30:59,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:30:59,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:30:59,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-01-31 14:30:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:31:00,502 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 14:31:00,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:31:01,719 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 14:31:01,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:31:01,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381124575] [2022-01-31 14:31:01,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:31:01,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939579241] [2022-01-31 14:31:01,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939579241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:31:01,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:31:01,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-01-31 14:31:01,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603713138] [2022-01-31 14:31:01,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:31:01,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 14:31:01,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:31:01,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 14:31:01,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-31 14:31:01,721 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 14:31:09,724 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 14:31:15,132 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 14:31:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:31:17,197 INFO L93 Difference]: Finished difference Result 2867 states and 3884 transitions. [2022-01-31 14:31:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 14:31:17,198 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 14:31:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:31:17,207 INFO L225 Difference]: With dead ends: 2867 [2022-01-31 14:31:17,208 INFO L226 Difference]: Without dead ends: 2863 [2022-01-31 14:31:17,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 14:31:17,209 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 303 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 318 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:31:17,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 742 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 958 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2022-01-31 14:31:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-01-31 14:31:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-01-31 14:31:17,261 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 14:31:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-01-31 14:31:17,268 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-01-31 14:31:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:31:17,268 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-01-31 14:31:17,268 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 14:31:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-01-31 14:31:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 14:31:17,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:31:17,270 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 14:31:17,295 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 14:31:17,483 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 14:31:17,483 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:31:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:31:17,484 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-01-31 14:31:17,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:31:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44974998] [2022-01-31 14:31:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:31:17,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:31:17,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:31:17,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246080768] [2022-01-31 14:31:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:31:17,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:31:17,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:31:17,493 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 14:31:17,494 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 14:31:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:31:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-31 14:31:17,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:31:18,876 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 14:31:18,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:31:23,783 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 14:31:23,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:31:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44974998] [2022-01-31 14:31:23,783 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:31:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246080768] [2022-01-31 14:31:23,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246080768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:31:23,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:31:23,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-01-31 14:31:23,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938169688] [2022-01-31 14:31:23,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:31:23,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 14:31:23,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:31:23,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 14:31:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-01-31 14:31:23,785 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 14:31:34,961 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 14:31:40,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:50,823 WARN L534 Checker$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 14:31:55,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:03,801 WARN L534 Checker$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 14:32:07,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:13,331 WARN L534 Checker$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 14:32:15,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:26,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:28,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:31,331 WARN L534 Checker$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 14:32:35,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:41,391 WARN L534 Checker$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 14:32:43,570 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 14:32:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:52,436 INFO L93 Difference]: Finished difference Result 3357 states and 4523 transitions. [2022-01-31 14:32:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 14:32:52,437 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 14:32:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:52,447 INFO L225 Difference]: With dead ends: 3357 [2022-01-31 14:32:52,448 INFO L226 Difference]: Without dead ends: 3328 [2022-01-31 14:32:52,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3716 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=1782, Invalid=9138, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 14:32:52,451 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 390 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 492 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.7s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:52,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1316 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 1684 Invalid, 11 Unknown, 0 Unchecked, 40.7s Time] [2022-01-31 14:32:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2022-01-31 14:32:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 3022. [2022-01-31 14:32:52,522 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 14:32:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4123 transitions. [2022-01-31 14:32:52,530 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4123 transitions. Word has length 88 [2022-01-31 14:32:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:52,530 INFO L470 AbstractCegarLoop]: Abstraction has 3022 states and 4123 transitions. [2022-01-31 14:32:52,531 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 14:32:52,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4123 transitions. [2022-01-31 14:32:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 14:32:52,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:52,532 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 14:32:52,556 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 14:32:52,733 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 14:32:52,733 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-01-31 14:32:52,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021209095] [2022-01-31 14:32:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:52,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:52,740 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:52,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870798346] [2022-01-31 14:32:52,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:32:52,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:52,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:52,742 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 14:32:52,742 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 14:32:52,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 14:32:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:32:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 14:32:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:53,319 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 14:32:53,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:53,636 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 14:32:53,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:53,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021209095] [2022-01-31 14:32:53,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:53,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870798346] [2022-01-31 14:32:53,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870798346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:53,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:53,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-31 14:32:53,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426096056] [2022-01-31 14:32:53,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:53,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 14:32:53,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 14:32:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-31 14:32:53,639 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 14:32:57,100 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 14:32:59,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:01,659 WARN L534 Checker$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 14:33:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:33:01,871 INFO L93 Difference]: Finished difference Result 3219 states and 4388 transitions. [2022-01-31 14:33:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 14:33:01,872 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 14:33:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:33:01,884 INFO L225 Difference]: With dead ends: 3219 [2022-01-31 14:33:01,884 INFO L226 Difference]: Without dead ends: 3209 [2022-01-31 14:33:01,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-01-31 14:33:01,885 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 109 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 144 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-01-31 14:33:01,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 595 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 462 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-01-31 14:33:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2022-01-31 14:33:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2949. [2022-01-31 14:33:01,935 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 14:33:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4028 transitions. [2022-01-31 14:33:01,942 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4028 transitions. Word has length 97 [2022-01-31 14:33:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:33:01,943 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4028 transitions. [2022-01-31 14:33:01,943 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 14:33:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4028 transitions. [2022-01-31 14:33:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 14:33:01,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:33:01,945 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 14:33:01,970 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 14:33:02,159 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 14:33:02,159 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:33:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:33:02,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-01-31 14:33:02,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:33:02,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767326055] [2022-01-31 14:33:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:02,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:33:02,166 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:33:02,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154596584] [2022-01-31 14:33:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:02,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:33:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:33:02,168 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 14:33:02,169 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 14:33:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:33:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 14:33:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:33:02,410 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 14:33:02,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:33:02,669 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 14:33:02,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:33:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767326055] [2022-01-31 14:33:02,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:33:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154596584] [2022-01-31 14:33:02,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154596584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:33:02,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:33:02,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-31 14:33:02,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496578835] [2022-01-31 14:33:02,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:33:02,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 14:33:02,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:33:02,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 14:33:02,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 14:33:02,671 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 14:33:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:33:03,291 INFO L93 Difference]: Finished difference Result 5495 states and 7503 transitions. [2022-01-31 14:33:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 14:33:03,291 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 14:33:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:33:03,312 INFO L225 Difference]: With dead ends: 5495 [2022-01-31 14:33:03,312 INFO L226 Difference]: Without dead ends: 5495 [2022-01-31 14:33:03,313 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 14:33:03,313 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 548 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:33:03,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 710 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 14:33:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-01-31 14:33:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5193. [2022-01-31 14:33:03,420 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 14:33:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5193 states to 5193 states and 7184 transitions. [2022-01-31 14:33:03,432 INFO L78 Accepts]: Start accepts. Automaton has 5193 states and 7184 transitions. Word has length 98 [2022-01-31 14:33:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:33:03,433 INFO L470 AbstractCegarLoop]: Abstraction has 5193 states and 7184 transitions. [2022-01-31 14:33:03,433 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 14:33:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5193 states and 7184 transitions. [2022-01-31 14:33:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 14:33:03,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:33:03,436 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 14:33:03,460 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 14:33:03,659 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 14:33:03,659 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:33:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:33:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-01-31 14:33:03,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:33:03,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702498000] [2022-01-31 14:33:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:03,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:33:03,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:33:03,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114927070] [2022-01-31 14:33:03,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:33:03,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:33:03,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:33:03,670 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 14:33:03,672 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 14:33:03,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:33:03,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:33:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-01-31 14:33:03,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:33:04,776 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 14:33:04,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:33:05,796 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 14:33:05,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:33:05,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702498000] [2022-01-31 14:33:05,797 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:33:05,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114927070] [2022-01-31 14:33:05,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114927070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:33:05,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:33:05,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-01-31 14:33:05,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774626203] [2022-01-31 14:33:05,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:33:05,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 14:33:05,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:33:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 14:33:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-31 14:33:05,798 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 14:33:09,888 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 14:33:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:33:15,886 INFO L93 Difference]: Finished difference Result 6201 states and 8562 transitions. [2022-01-31 14:33:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 14:33:15,887 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 14:33:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:33:15,903 INFO L225 Difference]: With dead ends: 6201 [2022-01-31 14:33:15,903 INFO L226 Difference]: Without dead ends: 6197 [2022-01-31 14:33:15,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 14:33:15,904 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 180 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 236 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-01-31 14:33:15,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1073 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1279 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-01-31 14:33:15,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6197 states. [2022-01-31 14:33:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6197 to 5573. [2022-01-31 14:33:15,992 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 14:33:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5573 states to 5573 states and 7780 transitions. [2022-01-31 14:33:16,004 INFO L78 Accepts]: Start accepts. Automaton has 5573 states and 7780 transitions. Word has length 108 [2022-01-31 14:33:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:33:16,005 INFO L470 AbstractCegarLoop]: Abstraction has 5573 states and 7780 transitions. [2022-01-31 14:33:16,005 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 14:33:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5573 states and 7780 transitions. [2022-01-31 14:33:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 14:33:16,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:33:16,007 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 14:33:16,025 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 14:33:16,215 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 14:33:16,215 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:33:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:33:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-01-31 14:33:16,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:33:16,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773488224] [2022-01-31 14:33:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:16,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:33:16,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:33:16,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709654799] [2022-01-31 14:33:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:16,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:33:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:33:16,225 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 14:33:16,229 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 14:33:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:33:16,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 14:33:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:33:16,541 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 14:33:16,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:33:16,835 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 14:33:16,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:33:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773488224] [2022-01-31 14:33:16,835 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:33:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709654799] [2022-01-31 14:33:16,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709654799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:33:16,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:33:16,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-01-31 14:33:16,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306286463] [2022-01-31 14:33:16,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:33:16,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 14:33:16,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:33:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 14:33:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 14:33:16,837 INFO L87 Difference]: Start difference. First operand 5573 states and 7780 transitions. Second operand has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 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 14:33:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:33:17,446 INFO L93 Difference]: Finished difference Result 5530 states and 7382 transitions. [2022-01-31 14:33:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 14:33:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 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 14:33:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:33:17,460 INFO L225 Difference]: With dead ends: 5530 [2022-01-31 14:33:17,460 INFO L226 Difference]: Without dead ends: 5530 [2022-01-31 14:33:17,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 14:33:17,461 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 494 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:33:17,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 617 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 14:33:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5530 states. [2022-01-31 14:33:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5530 to 5467. [2022-01-31 14:33:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5467 states, 3690 states have (on average 1.202710027100271) internal successors, (4438), 3706 states have internal predecessors, (4438), 1445 states have call successors, (1445), 333 states have call predecessors, (1445), 331 states have return successors, (1443), 1427 states have call predecessors, (1443), 1443 states have call successors, (1443) [2022-01-31 14:33:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5467 states to 5467 states and 7326 transitions. [2022-01-31 14:33:17,573 INFO L78 Accepts]: Start accepts. Automaton has 5467 states and 7326 transitions. Word has length 105 [2022-01-31 14:33:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:33:17,573 INFO L470 AbstractCegarLoop]: Abstraction has 5467 states and 7326 transitions. [2022-01-31 14:33:17,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 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 14:33:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5467 states and 7326 transitions. [2022-01-31 14:33:17,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 14:33:17,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:33:17,577 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 14:33:17,601 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 14:33:17,795 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 14:33:17,795 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:33:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:33:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-01-31 14:33:17,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:33:17,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129215276] [2022-01-31 14:33:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:17,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:33:17,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:33:17,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349369644] [2022-01-31 14:33:17,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:33:17,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:33:17,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:33:17,810 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 14:33:17,811 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 14:33:17,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:33:17,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:33:17,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 14:33:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:33:18,171 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 14:33:18,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:33:18,466 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 14:33:18,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:33:18,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129215276] [2022-01-31 14:33:18,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:33:18,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349369644] [2022-01-31 14:33:18,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349369644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:33:18,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:33:18,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-01-31 14:33:18,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383669882] [2022-01-31 14:33:18,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:33:18,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 14:33:18,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:33:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 14:33:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 14:33:18,468 INFO L87 Difference]: Start difference. First operand 5467 states and 7326 transitions. Second operand has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) [2022-01-31 14:33:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:33:19,040 INFO L93 Difference]: Finished difference Result 5536 states and 7358 transitions. [2022-01-31 14:33:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 14:33:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) Word has length 132 [2022-01-31 14:33:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:33:19,055 INFO L225 Difference]: With dead ends: 5536 [2022-01-31 14:33:19,055 INFO L226 Difference]: Without dead ends: 5536 [2022-01-31 14:33:19,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=592, Invalid=1048, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 14:33:19,056 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 516 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:33:19,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 611 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 14:33:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2022-01-31 14:33:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 5501. [2022-01-31 14:33:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5501 states, 3724 states have (on average 1.1928034371643395) internal successors, (4442), 3740 states have internal predecessors, (4442), 1445 states have call successors, (1445), 333 states have call predecessors, (1445), 331 states have return successors, (1443), 1427 states have call predecessors, (1443), 1443 states have call successors, (1443) [2022-01-31 14:33:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5501 states to 5501 states and 7330 transitions. [2022-01-31 14:33:19,160 INFO L78 Accepts]: Start accepts. Automaton has 5501 states and 7330 transitions. Word has length 132 [2022-01-31 14:33:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:33:19,160 INFO L470 AbstractCegarLoop]: Abstraction has 5501 states and 7330 transitions. [2022-01-31 14:33:19,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) [2022-01-31 14:33:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5501 states and 7330 transitions. [2022-01-31 14:33:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 14:33:19,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:33:19,166 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 14:33:19,191 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 14:33:19,387 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 14:33:19,388 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:33:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:33:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2087386651, now seen corresponding path program 3 times [2022-01-31 14:33:19,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:33:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646399348] [2022-01-31 14:33:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:19,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:33:19,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:33:19,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585943696] [2022-01-31 14:33:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:33:19,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:33:19,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:33:19,403 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 14:33:19,427 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 14:33:19,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 14:33:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:33:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 14:33:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:33:19,765 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 14:33:19,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:33:20,053 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 14:33:20,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:33:20,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646399348] [2022-01-31 14:33:20,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:33:20,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585943696] [2022-01-31 14:33:20,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585943696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:33:20,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:33:20,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-01-31 14:33:20,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388689880] [2022-01-31 14:33:20,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:33:20,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 14:33:20,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:33:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 14:33:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 14:33:20,054 INFO L87 Difference]: Start difference. First operand 5501 states and 7330 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 14:33:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:33:20,269 INFO L93 Difference]: Finished difference Result 7232 states and 9858 transitions. [2022-01-31 14:33:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 14:33:20,270 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 14:33:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:33:20,285 INFO L225 Difference]: With dead ends: 7232 [2022-01-31 14:33:20,286 INFO L226 Difference]: Without dead ends: 7232 [2022-01-31 14:33:20,286 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 14:33:20,286 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 25 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 388 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 14:33:20,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 388 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:33:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2022-01-31 14:33:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6377. [2022-01-31 14:33:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6377 states, 4271 states have (on average 1.202762819011941) internal successors, (5137), 4319 states have internal predecessors, (5137), 1798 states have call successors, (1798), 309 states have call predecessors, (1798), 307 states have return successors, (1796), 1748 states have call predecessors, (1796), 1796 states have call successors, (1796) [2022-01-31 14:33:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6377 states to 6377 states and 8731 transitions. [2022-01-31 14:33:20,425 INFO L78 Accepts]: Start accepts. Automaton has 6377 states and 8731 transitions. Word has length 165 [2022-01-31 14:33:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:33:20,426 INFO L470 AbstractCegarLoop]: Abstraction has 6377 states and 8731 transitions. [2022-01-31 14:33:20,426 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 14:33:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6377 states and 8731 transitions. [2022-01-31 14:33:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 14:33:20,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:33:20,433 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 11, 10, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:33:20,457 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 14:33:20,647 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 14:33:20,647 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:33:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:33:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1364196507, now seen corresponding path program 1 times [2022-01-31 14:33:20,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:33:20,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749482861] [2022-01-31 14:33:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:20,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:33:20,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:33:20,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446697451] [2022-01-31 14:33:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:33:20,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:33:20,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:33:20,664 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 14:33:20,666 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 14:33:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 14:33:20,869 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 14:33:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 14:33:21,167 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-31 14:33:21,167 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 14:33:21,168 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 14:33:21,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-31 14:33:21,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 14:33:21,378 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:33:21,381 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 14:33:21,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:33:21 BasicIcfg [2022-01-31 14:33:21,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 14:33:21,465 INFO L158 Benchmark]: Toolchain (without parser) took 161070.00ms. Allocated memory was 203.4MB in the beginning and 352.3MB in the end (delta: 148.9MB). Free memory was 149.7MB in the beginning and 179.0MB in the end (delta: -29.2MB). Peak memory consumption was 121.1MB. Max. memory is 8.0GB. [2022-01-31 14:33:21,465 INFO L158 Benchmark]: CDTParser took 0.67ms. Allocated memory is still 203.4MB. Free memory is still 166.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 14:33:21,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.28ms. Allocated memory is still 203.4MB. Free memory was 149.6MB in the beginning and 174.8MB in the end (delta: -25.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 14:33:21,466 INFO L158 Benchmark]: Boogie Preprocessor took 37.98ms. Allocated memory is still 203.4MB. Free memory was 174.8MB in the beginning and 173.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 14:33:21,466 INFO L158 Benchmark]: RCFGBuilder took 332.40ms. Allocated memory is still 203.4MB. Free memory was 173.3MB in the beginning and 160.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 14:33:21,466 INFO L158 Benchmark]: IcfgTransformer took 36.90ms. Allocated memory is still 203.4MB. Free memory was 160.7MB in the beginning and 159.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 14:33:21,466 INFO L158 Benchmark]: TraceAbstraction took 160440.92ms. Allocated memory was 203.4MB in the beginning and 352.3MB in the end (delta: 148.9MB). Free memory was 159.1MB in the beginning and 179.0MB in the end (delta: -19.9MB). Peak memory consumption was 130.6MB. Max. memory is 8.0GB. [2022-01-31 14:33:21,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67ms. Allocated memory is still 203.4MB. Free memory is still 166.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.28ms. Allocated memory is still 203.4MB. Free memory was 149.6MB in the beginning and 174.8MB in the end (delta: -25.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.98ms. Allocated memory is still 203.4MB. Free memory was 174.8MB in the beginning and 173.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 332.40ms. Allocated memory is still 203.4MB. Free memory was 173.3MB in the beginning and 160.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 36.90ms. Allocated memory is still 203.4MB. Free memory was 160.7MB in the beginning and 159.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 160440.92ms. Allocated memory was 203.4MB in the beginning and 352.3MB in the end (delta: 148.9MB). Free memory was 159.1MB in the beginning and 179.0MB in the end (delta: -19.9MB). Peak memory consumption was 130.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=27, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=13, y=21] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=13, y=21] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=13, b=21, counter=0, p=1, q=0, r=0, s=1, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=21, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=21, c=13, counter=1, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=21, c=13, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=21, c=13, counter=2, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=21, b=13, c=13, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=13, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=21, b=13, c=21, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=21, b=13, c=21, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=21, b=13, c=8, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=8, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=21, b=13, c=8, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=13, b=8, c=8, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=8, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=8, c=13, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=13, b=8, c=13, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=13, b=8, c=5, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=5, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=8, c=5, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=8, b=5, c=5, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=5, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=8, b=5, c=8, counter=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=12, counter++=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=8, b=5, c=8, counter=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, counter++=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=8, b=5, c=3, counter=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=3, counter=14, counter++=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=8, b=5, c=3, counter=14, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=15, counter++=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=16, counter++=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, counter++=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=18, counter++=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=18, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=19, counter++=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=20, counter++=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=21, counter++=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L48] COND FALSE !(counter++<20) [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=22, counter++=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L41] COND FALSE !(counter++<20) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=2, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=23, counter++=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=2, x=13, y=21] [L34] COND FALSE !(counter++<20) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=23] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=23] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=23] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 160.3s, OverallIterations: 29, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 131.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 16 mSolverCounterUnknown, 4282 SdHoareTripleChecker+Valid, 71.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4205 mSDsluCounter, 11309 SdHoareTripleChecker+Invalid, 69.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9515 mSDsCounter, 2968 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8501 IncrementalHoareTripleChecker+Invalid, 11485 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2968 mSolverCounterUnsat, 1794 mSDtfsCounter, 8501 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3230 GetRequests, 2643 SyntacticMatches, 19 SemanticMatches, 568 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6011 ImplicationChecksByTransitivity, 66.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6377occurred in iteration=28, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 28 MinimizatonAttempts, 3649 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 1855 NumberOfCodeBlocks, 1780 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2912 ConstructedInterpolants, 0 QuantifiedInterpolants, 15681 SizeOfPredicates, 159 NumberOfNonLiveVariables, 5329 ConjunctsInSsa, 642 ConjunctsInUnsatCore, 45 InterpolantComputations, 12 PerfectInterpolantSequences, 4523/5735 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-01-31 14:33:21,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...