/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/cohencu-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:40:49,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:40:49,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:40:49,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:40:49,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:40:49,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:40:49,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:40:49,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:40:49,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:40:49,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:40:49,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:40:49,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:40:49,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:40:49,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:40:49,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:40:49,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:40:49,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:40:49,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:40:49,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:40:49,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:40:49,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:40:49,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:40:49,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:40:49,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:40:49,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 13:40:49,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 13:40:49,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 13:40:49,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 13:40:49,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 13:40:49,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 13:40:49,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 13:40:49,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 13:40:49,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 13:40:49,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 13:40:49,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 13:40:49,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 13:40:49,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 13:40:49,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 13:40:49,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:40:49,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:40:49,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:40:49,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:40:49,530 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:40:49,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:40:49,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:40:49,531 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:40:49,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:40:49,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:40:49,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:40:49,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:40:49,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:40:49,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:40:49,532 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:40:49,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:40:49,532 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:40:49,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:40:49,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:40:49,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:40:49,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:40:49,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:40:49,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:40:49,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:40:49,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:40:49,534 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:40:49,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:40:49,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:40:49,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:40:49,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:40:49,698 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:40:49,701 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:40:49,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-01-31 13:40:49,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3782e9d3d/74e53049a23549dd82875a4dd29eacf0/FLAGfe0f964db [2022-01-31 13:40:50,058 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:40:50,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-01-31 13:40:50,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3782e9d3d/74e53049a23549dd82875a4dd29eacf0/FLAGfe0f964db [2022-01-31 13:40:50,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3782e9d3d/74e53049a23549dd82875a4dd29eacf0 [2022-01-31 13:40:50,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:40:50,511 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:40:50,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:40:50,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:40:50,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:40:50,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65e6fc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50, skipping insertion in model container [2022-01-31 13:40:50,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:40:50,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:40:50,621 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/cohencu-ll_unwindbound100.c[588,601] [2022-01-31 13:40:50,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:40:50,663 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:40:50,670 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/cohencu-ll_unwindbound100.c[588,601] [2022-01-31 13:40:50,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:40:50,688 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:40:50,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50 WrapperNode [2022-01-31 13:40:50,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:40:50,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:40:50,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:40:50,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:40:50,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:40:50,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:40:50,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:40:50,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:40:50,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:40:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:50,742 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 13:40:50,748 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 13:40:50,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:40:50,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:40:50,765 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:40:50,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 13:40:50,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:40:50,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:40:50,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:40:50,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:40:50,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:40:50,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:40:50,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:40:50,812 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:40:50,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:40:50,889 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:40:50,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:40:50,894 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 13:40:50,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:40:50 BoogieIcfgContainer [2022-01-31 13:40:50,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:40:50,895 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:40:50,895 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:40:50,896 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:40:50,899 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:40:50" (1/1) ... [2022-01-31 13:40:50,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:40:50 BasicIcfg [2022-01-31 13:40:50,911 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:40:50,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:40:50,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:40:50,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:40:50,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:40:50" (1/4) ... [2022-01-31 13:40:50,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d33b25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:40:50, skipping insertion in model container [2022-01-31 13:40:50,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:40:50" (2/4) ... [2022-01-31 13:40:50,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d33b25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:40:50, skipping insertion in model container [2022-01-31 13:40:50,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:40:50" (3/4) ... [2022-01-31 13:40:50,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d33b25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:40:50, skipping insertion in model container [2022-01-31 13:40:50,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:40:50" (4/4) ... [2022-01-31 13:40:50,917 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.cJordan [2022-01-31 13:40:50,920 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:40:50,920 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:40:50,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:40:50,952 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 13:40:50,952 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:40:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 13:40:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 13:40:50,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:50,965 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:50,966 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:50,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2022-01-31 13:40:50,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:50,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728755930] [2022-01-31 13:40:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:50,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:51,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:40:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:40:51,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:51,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728755930] [2022-01-31 13:40:51,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728755930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:40:51,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:40:51,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:40:51,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085989096] [2022-01-31 13:40:51,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:40:51,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:40:51,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:40:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:40:51,167 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:40:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:51,272 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-01-31 13:40:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:40:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 13:40:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:51,279 INFO L225 Difference]: With dead ends: 32 [2022-01-31 13:40:51,279 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 13:40:51,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:40:51,283 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:51,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:40:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 13:40:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-31 13:40:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 13:40:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2022-01-31 13:40:51,308 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2022-01-31 13:40:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:51,309 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2022-01-31 13:40:51,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:40:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2022-01-31 13:40:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 13:40:51,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:51,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:51,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:40:51,310 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2022-01-31 13:40:51,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:51,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447182743] [2022-01-31 13:40:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:51,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:51,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:40:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:40:51,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447182743] [2022-01-31 13:40:51,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447182743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:40:51,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:40:51,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:40:51,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973242549] [2022-01-31 13:40:51,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:40:51,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:40:51,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:40:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:40:51,422 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:40:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:51,522 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-01-31 13:40:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:40:51,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 13:40:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:51,524 INFO L225 Difference]: With dead ends: 28 [2022-01-31 13:40:51,524 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 13:40:51,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 13:40:51,527 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:51,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:40:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 13:40:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 13:40:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 13:40:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-01-31 13:40:51,537 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2022-01-31 13:40:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:51,537 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-01-31 13:40:51,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:40:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-01-31 13:40:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 13:40:51,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:51,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:51,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 13:40:51,538 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:51,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:51,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2022-01-31 13:40:51,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:51,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573390044] [2022-01-31 13:40:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:51,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:51,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:40:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:40:51,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:51,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573390044] [2022-01-31 13:40:51,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573390044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:40:51,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:40:51,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 13:40:51,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97258650] [2022-01-31 13:40:51,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:40:51,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 13:40:51,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 13:40:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:40:51,638 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:40:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:51,782 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-01-31 13:40:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 13:40:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 13:40:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:51,783 INFO L225 Difference]: With dead ends: 32 [2022-01-31 13:40:51,784 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 13:40:51,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:40:51,785 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:51,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:40:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 13:40:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 13:40:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 13:40:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-01-31 13:40:51,790 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-01-31 13:40:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:51,791 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-01-31 13:40:51,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:40:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-01-31 13:40:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 13:40:51,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:51,791 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:51,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 13:40:51,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:51,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2022-01-31 13:40:51,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:51,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322686283] [2022-01-31 13:40:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:51,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:51,801 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:51,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883962977] [2022-01-31 13:40:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:51,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:51,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:51,803 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 13:40:51,804 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 13:40:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:51,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:40:51,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:40:51,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:40:51,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:51,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322686283] [2022-01-31 13:40:51,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883962977] [2022-01-31 13:40:51,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883962977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:40:51,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:40:51,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:40:51,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564431001] [2022-01-31 13:40:51,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:40:51,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:40:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:40:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:40:51,959 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 13:40:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:51,994 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-01-31 13:40:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:40:51,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-01-31 13:40:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:51,999 INFO L225 Difference]: With dead ends: 48 [2022-01-31 13:40:51,999 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 13:40:51,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 13:40:52,006 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:52,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 153 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:40:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 13:40:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-01-31 13:40:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 13:40:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-01-31 13:40:52,018 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2022-01-31 13:40:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:52,018 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-01-31 13:40:52,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 13:40:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-01-31 13:40:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 13:40:52,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:52,019 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:52,041 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 13:40:52,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:52,232 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2022-01-31 13:40:52,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:52,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591758087] [2022-01-31 13:40:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:52,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:52,240 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:52,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128938987] [2022-01-31 13:40:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:52,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:52,246 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 13:40:52,247 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 13:40:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:52,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:40:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:40:52,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:40:52,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:52,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591758087] [2022-01-31 13:40:52,338 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:52,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128938987] [2022-01-31 13:40:52,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128938987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:40:52,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:40:52,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:40:52,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231202153] [2022-01-31 13:40:52,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:40:52,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:40:52,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:52,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:40:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:40:52,340 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 13:40:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:52,369 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-01-31 13:40:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:40:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 13:40:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:52,370 INFO L225 Difference]: With dead ends: 52 [2022-01-31 13:40:52,370 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 13:40:52,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 13:40:52,370 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:52,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 150 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:40:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 13:40:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-01-31 13:40:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 13:40:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-01-31 13:40:52,376 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2022-01-31 13:40:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:52,376 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-01-31 13:40:52,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 13:40:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-01-31 13:40:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 13:40:52,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:52,376 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:52,423 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 13:40:52,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:52,618 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:52,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:52,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2022-01-31 13:40:52,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:52,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014672883] [2022-01-31 13:40:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:52,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:52,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:52,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022426465] [2022-01-31 13:40:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:52,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:52,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:52,626 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 13:40:52,627 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 13:40:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:52,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:40:52,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 13:40:52,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:40:52,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:52,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014672883] [2022-01-31 13:40:52,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:52,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022426465] [2022-01-31 13:40:52,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022426465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:40:52,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:40:52,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:40:52,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783540944] [2022-01-31 13:40:52,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:40:52,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:40:52,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:52,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:40:52,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:40:52,741 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 13:40:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:52,790 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-01-31 13:40:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:40:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-01-31 13:40:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:52,792 INFO L225 Difference]: With dead ends: 60 [2022-01-31 13:40:52,792 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 13:40:52,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 13:40:52,792 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:52,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 151 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:40:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 13:40:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 13:40:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 13:40:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-01-31 13:40:52,797 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2022-01-31 13:40:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:52,797 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-01-31 13:40:52,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 13:40:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-01-31 13:40:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 13:40:52,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:52,799 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 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 13:40:52,816 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 13:40:53,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:53,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2022-01-31 13:40:53,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:53,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006816550] [2022-01-31 13:40:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:53,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:53,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:53,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822715352] [2022-01-31 13:40:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:53,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:53,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:53,021 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 13:40:53,023 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 13:40:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:40:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 13:40:53,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:40:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 13:40:53,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:53,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006816550] [2022-01-31 13:40:53,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:53,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822715352] [2022-01-31 13:40:53,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822715352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:40:53,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:40:53,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 13:40:53,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994369968] [2022-01-31 13:40:53,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:40:53,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:40:53,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:53,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:40:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:40:53,264 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-31 13:40:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:53,370 INFO L93 Difference]: Finished difference Result 104 states and 133 transitions. [2022-01-31 13:40:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 13:40:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2022-01-31 13:40:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:53,379 INFO L225 Difference]: With dead ends: 104 [2022-01-31 13:40:53,380 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 13:40:53,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:40:53,381 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 56 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:53,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 191 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:40:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 13:40:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-01-31 13:40:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 13:40:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2022-01-31 13:40:53,397 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 45 [2022-01-31 13:40:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:53,397 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2022-01-31 13:40:53,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-31 13:40:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2022-01-31 13:40:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 13:40:53,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:53,398 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:53,417 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 13:40:53,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:53,599 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2022-01-31 13:40:53,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:53,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127237558] [2022-01-31 13:40:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:53,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:53,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:53,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970635392] [2022-01-31 13:40:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:53,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:53,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:53,617 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 13:40:53,619 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 13:40:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:53,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 13:40:53,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 13:40:53,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:40:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 13:40:53,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:53,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127237558] [2022-01-31 13:40:53,889 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:53,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970635392] [2022-01-31 13:40:53,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970635392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:40:53,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:40:53,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 13:40:53,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840576016] [2022-01-31 13:40:53,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:40:53,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:40:53,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:40:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:40:53,891 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-31 13:40:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:54,134 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-01-31 13:40:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:40:54,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 45 [2022-01-31 13:40:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:54,136 INFO L225 Difference]: With dead ends: 116 [2022-01-31 13:40:54,136 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 13:40:54,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:40:54,137 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:54,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:40:54,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 13:40:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-31 13:40:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 states have internal predecessors, (67), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 13:40:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2022-01-31 13:40:54,143 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 45 [2022-01-31 13:40:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:54,143 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2022-01-31 13:40:54,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-31 13:40:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2022-01-31 13:40:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 13:40:54,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:54,144 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:54,161 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 13:40:54,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:54,345 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2022-01-31 13:40:54,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:54,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24278933] [2022-01-31 13:40:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:54,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:54,352 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:54,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836660414] [2022-01-31 13:40:54,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:40:54,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:54,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:54,353 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 13:40:54,354 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 13:40:54,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:40:54,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:40:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 13:40:54,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 13:40:54,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:40:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 13:40:54,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:54,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24278933] [2022-01-31 13:40:54,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:54,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836660414] [2022-01-31 13:40:54,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836660414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:40:54,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:40:54,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 13:40:54,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197756440] [2022-01-31 13:40:54,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:40:54,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:40:54,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:54,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:40:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:40:54,610 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-01-31 13:40:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:54,669 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2022-01-31 13:40:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:40:54,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 50 [2022-01-31 13:40:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:54,670 INFO L225 Difference]: With dead ends: 120 [2022-01-31 13:40:54,670 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 13:40:54,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 13:40:54,671 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:54,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 263 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:40:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 13:40:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-01-31 13:40:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 66 states have internal predecessors, (70), 40 states have call successors, (40), 17 states have call predecessors, (40), 16 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 13:40:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2022-01-31 13:40:54,677 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 50 [2022-01-31 13:40:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:54,677 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2022-01-31 13:40:54,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-01-31 13:40:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2022-01-31 13:40:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 13:40:54,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:54,678 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:54,694 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 13:40:54,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:54,891 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:54,892 INFO L85 PathProgramCache]: Analyzing trace with hash -895540175, now seen corresponding path program 3 times [2022-01-31 13:40:54,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:54,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173185670] [2022-01-31 13:40:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:54,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:54,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:54,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033058913] [2022-01-31 13:40:54,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:40:54,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:54,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:54,902 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 13:40:54,903 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 13:40:54,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 13:40:54,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:40:54,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 13:40:54,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 13:40:55,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:40:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 13:40:55,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173185670] [2022-01-31 13:40:55,332 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:55,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033058913] [2022-01-31 13:40:55,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033058913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:40:55,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:40:55,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 13:40:55,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250783888] [2022-01-31 13:40:55,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:40:55,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:40:55,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:55,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:40:55,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:40:55,333 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-31 13:40:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:55,953 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2022-01-31 13:40:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:40:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 55 [2022-01-31 13:40:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:55,954 INFO L225 Difference]: With dead ends: 144 [2022-01-31 13:40:55,954 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 13:40:55,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:40:55,955 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:55,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 13:40:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 13:40:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-01-31 13:40:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 84 states have internal predecessors, (88), 31 states have call successors, (31), 23 states have call predecessors, (31), 22 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 13:40:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-01-31 13:40:55,960 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 55 [2022-01-31 13:40:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:55,960 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-01-31 13:40:55,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-31 13:40:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-01-31 13:40:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 13:40:55,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:55,961 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 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 13:40:55,979 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 13:40:56,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:56,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2022-01-31 13:40:56,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:56,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361421782] [2022-01-31 13:40:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:56,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:56,178 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:56,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333108964] [2022-01-31 13:40:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:56,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:56,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:56,179 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 13:40:56,181 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 13:40:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 13:40:56,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-31 13:40:56,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:40:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-31 13:40:57,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:57,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361421782] [2022-01-31 13:40:57,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:57,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333108964] [2022-01-31 13:40:57,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333108964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:40:57,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:40:57,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 13:40:57,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208743891] [2022-01-31 13:40:57,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:40:57,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 13:40:57,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 13:40:57,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:40:57,011 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-01-31 13:40:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:57,214 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2022-01-31 13:40:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 13:40:57,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 71 [2022-01-31 13:40:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:57,216 INFO L225 Difference]: With dead ends: 146 [2022-01-31 13:40:57,216 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 13:40:57,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:40:57,216 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:57,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 225 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:40:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 13:40:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-01-31 13:40:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 86 states have (on average 1.069767441860465) internal successors, (92), 88 states have internal predecessors, (92), 31 states have call successors, (31), 25 states have call predecessors, (31), 23 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 13:40:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 150 transitions. [2022-01-31 13:40:57,221 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 150 transitions. Word has length 71 [2022-01-31 13:40:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:57,221 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 150 transitions. [2022-01-31 13:40:57,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-01-31 13:40:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 150 transitions. [2022-01-31 13:40:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 13:40:57,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:57,222 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-01-31 13:40:57,238 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 13:40:57,434 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,SelfDestructingSolverStorable10 [2022-01-31 13:40:57,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:57,435 INFO L85 PathProgramCache]: Analyzing trace with hash -601883655, now seen corresponding path program 1 times [2022-01-31 13:40:57,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:57,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479378485] [2022-01-31 13:40:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:57,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:57,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:57,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637218043] [2022-01-31 13:40:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:57,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:57,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:57,447 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 13:40:57,448 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 13:40:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:40:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 13:40:57,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:40:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-01-31 13:40:57,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:40:57,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:40:57,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479378485] [2022-01-31 13:40:57,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:40:57,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637218043] [2022-01-31 13:40:57,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637218043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:40:57,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:40:57,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-01-31 13:40:57,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163479502] [2022-01-31 13:40:57,876 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:40:57,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 13:40:57,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:40:57,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 13:40:57,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:40:57,877 INFO L87 Difference]: Start difference. First operand 141 states and 150 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 13:40:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:40:57,943 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-01-31 13:40:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:40:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-01-31 13:40:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:40:57,944 INFO L225 Difference]: With dead ends: 141 [2022-01-31 13:40:57,944 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 13:40:57,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:40:57,944 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:40:57,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 229 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:40:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 13:40:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-01-31 13:40:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 23 states have call predecessors, (28), 22 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 13:40:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2022-01-31 13:40:57,947 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 76 [2022-01-31 13:40:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:40:57,948 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2022-01-31 13:40:57,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 13:40:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2022-01-31 13:40:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 13:40:57,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:40:57,948 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:40:57,967 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 13:40:58,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:58,155 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:40:58,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:40:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1157335722, now seen corresponding path program 4 times [2022-01-31 13:40:58,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:40:58,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029463113] [2022-01-31 13:40:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:40:58,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:40:58,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:40:58,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022939492] [2022-01-31 13:40:58,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 13:40:58,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:40:58,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:40:58,163 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 13:40:58,165 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 13:41:00,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 13:41:00,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:41:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 13:41:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:41:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 104 proven. 43 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-01-31 13:41:00,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:41:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-01-31 13:41:01,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:41:01,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029463113] [2022-01-31 13:41:01,314 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:41:01,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022939492] [2022-01-31 13:41:01,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022939492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:41:01,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:41:01,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2022-01-31 13:41:01,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836831909] [2022-01-31 13:41:01,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:41:01,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 13:41:01,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:41:01,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 13:41:01,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:41:01,316 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-01-31 13:41:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:41:01,418 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2022-01-31 13:41:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:41:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 78 [2022-01-31 13:41:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:41:01,419 INFO L225 Difference]: With dead ends: 140 [2022-01-31 13:41:01,419 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 13:41:01,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-31 13:41:01,420 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:41:01,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 98 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:41:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 13:41:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-01-31 13:41:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 28 states have call successors, (28), 25 states have call predecessors, (28), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 13:41:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2022-01-31 13:41:01,423 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 78 [2022-01-31 13:41:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:41:01,423 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2022-01-31 13:41:01,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-01-31 13:41:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2022-01-31 13:41:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 13:41:01,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:41:01,424 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:41:01,433 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 13:41:01,631 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,SelfDestructingSolverStorable12 [2022-01-31 13:41:01,632 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:41:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:41:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash -821976909, now seen corresponding path program 2 times [2022-01-31 13:41:01,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:41:01,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024324069] [2022-01-31 13:41:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:41:01,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:41:01,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:41:01,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406840780] [2022-01-31 13:41:01,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:41:01,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:41:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:41:01,642 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 13:41:01,643 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 13:41:01,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:41:01,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:41:01,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 13:41:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:41:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-01-31 13:41:01,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:41:02,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:41:02,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024324069] [2022-01-31 13:41:02,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:41:02,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406840780] [2022-01-31 13:41:02,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406840780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:41:02,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:41:02,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-01-31 13:41:02,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676803094] [2022-01-31 13:41:02,168 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:41:02,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:41:02,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:41:02,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:41:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:41:02,170 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 13:41:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:41:02,272 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2022-01-31 13:41:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 13:41:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 104 [2022-01-31 13:41:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:41:02,273 INFO L225 Difference]: With dead ends: 138 [2022-01-31 13:41:02,273 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 13:41:02,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-31 13:41:02,274 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:41:02,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 277 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:41:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 13:41:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-01-31 13:41:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 25 states have call successors, (25), 23 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 13:41:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-01-31 13:41:02,278 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 104 [2022-01-31 13:41:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:41:02,279 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-01-31 13:41:02,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 13:41:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-01-31 13:41:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 13:41:02,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:41:02,280 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:41:02,298 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 13:41:02,480 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,SelfDestructingSolverStorable13 [2022-01-31 13:41:02,480 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:41:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:41:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1992307858, now seen corresponding path program 2 times [2022-01-31 13:41:02,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:41:02,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227168017] [2022-01-31 13:41:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:41:02,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:41:02,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:41:02,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490369729] [2022-01-31 13:41:02,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:41:02,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:41:02,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:41:02,492 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 13:41:02,492 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 13:41:02,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:41:02,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:41:02,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 13:41:02,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:41:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 42 proven. 48 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-01-31 13:41:02,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:41:03,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:41:03,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227168017] [2022-01-31 13:41:03,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:41:03,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490369729] [2022-01-31 13:41:03,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490369729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:41:03,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:41:03,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 13:41:03,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127650135] [2022-01-31 13:41:03,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:41:03,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 13:41:03,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:41:03,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 13:41:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:41:03,134 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-01-31 13:41:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:41:03,293 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2022-01-31 13:41:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 13:41:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 127 [2022-01-31 13:41:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:41:03,294 INFO L225 Difference]: With dead ends: 150 [2022-01-31 13:41:03,294 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 13:41:03,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:41:03,294 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:41:03,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 371 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:41:03,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 13:41:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-01-31 13:41:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.043956043956044) internal successors, (95), 93 states have internal predecessors, (95), 32 states have call successors, (32), 26 states have call predecessors, (32), 25 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 13:41:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2022-01-31 13:41:03,302 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 127 [2022-01-31 13:41:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:41:03,303 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2022-01-31 13:41:03,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-01-31 13:41:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2022-01-31 13:41:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 13:41:03,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:41:03,304 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:41:03,322 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 13:41:03,511 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,SelfDestructingSolverStorable14 [2022-01-31 13:41:03,511 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:41:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:41:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1089028459, now seen corresponding path program 2 times [2022-01-31 13:41:03,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:41:03,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077974573] [2022-01-31 13:41:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:41:03,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:41:03,518 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:41:03,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316553777] [2022-01-31 13:41:03,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:41:03,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:41:03,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:41:03,519 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 13:41:03,520 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 13:41:03,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:41:03,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:41:03,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 13:41:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:41:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-31 13:41:03,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:41:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-01-31 13:41:03,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:41:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077974573] [2022-01-31 13:41:03,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:41:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316553777] [2022-01-31 13:41:03,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316553777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:41:03,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:41:03,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 13:41:03,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589328474] [2022-01-31 13:41:03,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:41:03,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 13:41:03,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:41:03,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 13:41:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:41:03,965 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) [2022-01-31 13:41:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:41:04,245 INFO L93 Difference]: Finished difference Result 355 states and 369 transitions. [2022-01-31 13:41:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 13:41:04,245 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), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) Word has length 129 [2022-01-31 13:41:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:41:04,246 INFO L225 Difference]: With dead ends: 355 [2022-01-31 13:41:04,246 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 13:41:04,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-01-31 13:41:04,247 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 148 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:41:04,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 370 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:41:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 13:41:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 311. [2022-01-31 13:41:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 194 states have (on average 1.0463917525773196) internal successors, (203), 200 states have internal predecessors, (203), 63 states have call successors, (63), 55 states have call predecessors, (63), 53 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-01-31 13:41:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 326 transitions. [2022-01-31 13:41:04,254 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 326 transitions. Word has length 129 [2022-01-31 13:41:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:41:04,254 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 326 transitions. [2022-01-31 13:41:04,254 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), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) [2022-01-31 13:41:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 326 transitions. [2022-01-31 13:41:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 13:41:04,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:41:04,255 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:41:04,271 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 13:41:04,463 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,SelfDestructingSolverStorable15 [2022-01-31 13:41:04,463 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:41:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:41:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash -925808019, now seen corresponding path program 3 times [2022-01-31 13:41:04,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:41:04,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795555411] [2022-01-31 13:41:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:41:04,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:41:04,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:41:04,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560115431] [2022-01-31 13:41:04,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:41:04,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:41:04,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:41:04,471 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 13:41:04,472 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 13:41:04,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 13:41:04,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:41:04,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 13:41:04,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:41:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-01-31 13:41:05,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:41:05,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:41:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795555411] [2022-01-31 13:41:05,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:41:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560115431] [2022-01-31 13:41:05,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560115431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:41:05,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:41:05,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 13:41:05,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097309444] [2022-01-31 13:41:05,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:41:05,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 13:41:05,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:41:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 13:41:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:41:05,503 INFO L87 Difference]: Start difference. First operand 311 states and 326 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-01-31 13:41:05,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:41:05,640 INFO L93 Difference]: Finished difference Result 311 states and 325 transitions. [2022-01-31 13:41:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 13:41:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 132 [2022-01-31 13:41:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:41:05,642 INFO L225 Difference]: With dead ends: 311 [2022-01-31 13:41:05,642 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 13:41:05,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:41:05,643 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:41:05,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 372 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:41:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 13:41:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-01-31 13:41:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 189 states have (on average 1.0423280423280423) internal successors, (197), 195 states have internal predecessors, (197), 60 states have call successors, (60), 53 states have call predecessors, (60), 52 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-01-31 13:41:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 315 transitions. [2022-01-31 13:41:05,648 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 315 transitions. Word has length 132 [2022-01-31 13:41:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:41:05,649 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 315 transitions. [2022-01-31 13:41:05,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-01-31 13:41:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 315 transitions. [2022-01-31 13:41:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 13:41:05,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:41:05,650 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:41:05,663 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 13:41:05,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:41:05,857 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:41:05,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:41:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash 386125940, now seen corresponding path program 3 times [2022-01-31 13:41:05,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:41:05,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047466727] [2022-01-31 13:41:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:41:05,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:41:05,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:41:05,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912475796] [2022-01-31 13:41:05,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:41:05,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:41:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:41:05,864 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 13:41:05,865 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 13:41:06,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 13:41:06,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:41:06,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 13:41:06,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:41:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 143 proven. 16 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2022-01-31 13:41:06,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:41:08,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:41:08,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047466727] [2022-01-31 13:41:08,590 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:41:08,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912475796] [2022-01-31 13:41:08,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912475796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:41:08,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:41:08,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 13:41:08,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826310097] [2022-01-31 13:41:08,590 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 13:41:08,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 13:41:08,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:41:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 13:41:08,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=69, Unknown=1, NotChecked=0, Total=90 [2022-01-31 13:41:08,591 INFO L87 Difference]: Start difference. First operand 302 states and 315 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-31 13:41:10,835 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 13:41:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:41:10,850 INFO L93 Difference]: Finished difference Result 309 states and 323 transitions. [2022-01-31 13:41:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 13:41:10,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 155 [2022-01-31 13:41:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:41:10,852 INFO L225 Difference]: With dead ends: 309 [2022-01-31 13:41:10,852 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 13:41:10,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=37, Invalid=118, Unknown=1, NotChecked=0, Total=156 [2022-01-31 13:41:10,853 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:41:10,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 149 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 134 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 13:41:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 13:41:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2022-01-31 13:41:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 192 states have (on average 1.0416666666666667) internal successors, (200), 199 states have internal predecessors, (200), 62 states have call successors, (62), 54 states have call predecessors, (62), 53 states have return successors, (60), 54 states have call predecessors, (60), 60 states have call successors, (60) [2022-01-31 13:41:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 322 transitions. [2022-01-31 13:41:10,858 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 322 transitions. Word has length 155 [2022-01-31 13:41:10,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:41:10,859 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 322 transitions. [2022-01-31 13:41:10,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-31 13:41:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 322 transitions. [2022-01-31 13:41:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 13:41:10,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:41:10,860 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:41:10,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-31 13:41:11,060 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,SelfDestructingSolverStorable17 [2022-01-31 13:41:11,060 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:41:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:41:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash -939165401, now seen corresponding path program 4 times [2022-01-31 13:41:11,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:41:11,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848880386] [2022-01-31 13:41:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:41:11,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:41:11,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:41:11,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237852163] [2022-01-31 13:41:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 13:41:11,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:41:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:41:11,068 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 13:41:11,069 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 13:41:12,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 13:41:12,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:41:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 76 conjunts are in the unsatisfiable core [2022-01-31 13:41:12,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:41:40,030 WARN L228 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)