/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/hard-u_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 17:32:13,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 17:32:13,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 17:32:13,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 17:32:13,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 17:32:13,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 17:32:13,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 17:32:13,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 17:32:14,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 17:32:14,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 17:32:14,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 17:32:14,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 17:32:14,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 17:32:14,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 17:32:14,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 17:32:14,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 17:32:14,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 17:32:14,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 17:32:14,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 17:32:14,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 17:32:14,020 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 17:32:14,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 17:32:14,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 17:32:14,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 17:32:14,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 17:32:14,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 17:32:14,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 17:32:14,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 17:32:14,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 17:32:14,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 17:32:14,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 17:32:14,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 17:32:14,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 17:32:14,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 17:32:14,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 17:32:14,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 17:32:14,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 17:32:14,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 17:32:14,043 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 17:32:14,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 17:32:14,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 17:32:14,044 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 17:32:14,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 17:32:14,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 17:32:14,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 17:32:14,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 17:32:14,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 17:32:14,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 17:32:14,045 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 17:32:14,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 17:32:14,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 17:32:14,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 17:32:14,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 17:32:14,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 17:32:14,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 17:32:14,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 17:32:14,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:32:14,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 17:32:14,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 17:32:14,047 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 17:32:14,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 17:32:14,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 17:32:14,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 17:32:14,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 17:32:14,233 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 17:32:14,233 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 17:32:14,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2022-03-17 17:32:14,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3468f28/5c1bb0cd4fe94a539e34a0bba577469b/FLAG6a7b74c0c [2022-03-17 17:32:14,640 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 17:32:14,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2022-03-17 17:32:14,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3468f28/5c1bb0cd4fe94a539e34a0bba577469b/FLAG6a7b74c0c [2022-03-17 17:32:15,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3468f28/5c1bb0cd4fe94a539e34a0bba577469b [2022-03-17 17:32:15,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 17:32:15,054 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 17:32:15,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 17:32:15,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 17:32:15,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 17:32:15,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a90a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15, skipping insertion in model container [2022-03-17 17:32:15,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 17:32:15,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 17:32:15,233 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/hard-u_valuebound5.c[537,550] [2022-03-17 17:32:15,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:32:15,267 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 17:32:15,278 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/hard-u_valuebound5.c[537,550] [2022-03-17 17:32:15,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:32:15,305 INFO L208 MainTranslator]: Completed translation [2022-03-17 17:32:15,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15 WrapperNode [2022-03-17 17:32:15,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 17:32:15,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 17:32:15,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 17:32:15,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 17:32:15,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 17:32:15,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 17:32:15,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 17:32:15,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 17:32:15,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:32:15,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:32:15,389 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) [2022-03-17 17:32:15,407 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 [2022-03-17 17:32:15,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 17:32:15,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 17:32:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 17:32:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 17:32:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 17:32:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 17:32:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 17:32:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 17:32:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 17:32:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 17:32:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 17:32:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 17:32:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 17:32:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 17:32:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 17:32:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 17:32:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 17:32:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 17:32:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 17:32:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 17:32:15,463 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 17:32:15,464 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 17:32:15,607 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 17:32:15,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 17:32:15,611 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 17:32:15,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:32:15 BoogieIcfgContainer [2022-03-17 17:32:15,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 17:32:15,613 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 17:32:15,613 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 17:32:15,628 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 17:32:15,630 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:32:15" (1/1) ... [2022-03-17 17:32:15,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:32:15 BasicIcfg [2022-03-17 17:32:15,643 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 17:32:15,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 17:32:15,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 17:32:15,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 17:32:15,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 05:32:15" (1/4) ... [2022-03-17 17:32:15,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf4e029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:32:15, skipping insertion in model container [2022-03-17 17:32:15,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:32:15" (2/4) ... [2022-03-17 17:32:15,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf4e029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:32:15, skipping insertion in model container [2022-03-17 17:32:15,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:32:15" (3/4) ... [2022-03-17 17:32:15,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf4e029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:32:15, skipping insertion in model container [2022-03-17 17:32:15,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:32:15" (4/4) ... [2022-03-17 17:32:15,665 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound5.cJordan [2022-03-17 17:32:15,668 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 17:32:15,668 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 17:32:15,715 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 17:32:15,719 INFO L340 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 [2022-03-17 17:32:15,720 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 17:32:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 17:32:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 17:32:15,744 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:32:15,745 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:32:15,745 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:32:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:32:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-03-17 17:32:15,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:32:15,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830648879] [2022-03-17 17:32:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:32:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:15,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:32:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:32:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:15,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 17:32:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:15,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 17:32:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:32:15,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:32:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830648879] [2022-03-17 17:32:15,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830648879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:32:15,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:32:15,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 17:32:15,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823345626] [2022-03-17 17:32:15,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:32:15,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 17:32:15,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:32:15,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 17:32:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:32:15,974 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:32:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:32:16,026 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-17 17:32:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 17:32:16,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 17:32:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:32:16,034 INFO L225 Difference]: With dead ends: 38 [2022-03-17 17:32:16,034 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 17:32:16,035 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:32:16,038 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:32:16,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:32:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 17:32:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-17 17:32:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 17:32:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-17 17:32:16,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-17 17:32:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:32:16,079 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-17 17:32:16,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:32:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-17 17:32:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 17:32:16,082 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:32:16,082 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:32:16,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 17:32:16,083 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:32:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:32:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-03-17 17:32:16,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:32:16,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604596116] [2022-03-17 17:32:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:16,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:32:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:32:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:32:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 17:32:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 17:32:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:32:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:32:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604596116] [2022-03-17 17:32:16,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604596116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:32:16,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:32:16,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:32:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232871342] [2022-03-17 17:32:16,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:32:16,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:32:16,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:32:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:32:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:32:16,224 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 17:32:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:32:16,364 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-17 17:32:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 17:32:16,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-17 17:32:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:32:16,366 INFO L225 Difference]: With dead ends: 44 [2022-03-17 17:32:16,366 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 17:32:16,366 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:32:16,367 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:32:16,367 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:32:16,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 17:32:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-17 17:32:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 17:32:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-17 17:32:16,374 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-17 17:32:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:32:16,374 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-17 17:32:16,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 17:32:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-17 17:32:16,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 17:32:16,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:32:16,375 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:32:16,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 17:32:16,377 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:32:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:32:16,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-03-17 17:32:16,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:32:16,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602438658] [2022-03-17 17:32:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:16,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:32:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:32:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:32:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 17:32:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 17:32:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-17 17:32:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:32:16,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:32:16,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602438658] [2022-03-17 17:32:16,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602438658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:32:16,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:32:16,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:32:16,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715036495] [2022-03-17 17:32:16,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:32:16,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:32:16,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:32:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:32:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:32:16,523 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:32:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:32:16,667 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-17 17:32:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 17:32:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 17:32:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:32:16,669 INFO L225 Difference]: With dead ends: 48 [2022-03-17 17:32:16,669 INFO L226 Difference]: Without dead ends: 48 [2022-03-17 17:32:16,669 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:32:16,670 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:32:16,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:32:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-17 17:32:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-17 17:32:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 17:32:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-17 17:32:16,676 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-17 17:32:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:32:16,676 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-17 17:32:16,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:32:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-17 17:32:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 17:32:16,677 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:32:16,678 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:32:16,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 17:32:16,678 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:32:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:32:16,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-03-17 17:32:16,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:32:16,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876839227] [2022-03-17 17:32:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:16,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:32:16,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:32:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775051097] [2022-03-17 17:32:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:16,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:16,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:32:16,691 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) [2022-03-17 17:32:16,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 17:32:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:16,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:32:16,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:32:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 17:32:16,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:32:16,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:32:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876839227] [2022-03-17 17:32:16,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:32:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775051097] [2022-03-17 17:32:16,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775051097] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:32:16,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:32:16,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:32:16,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876046904] [2022-03-17 17:32:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:32:16,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:32:16,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:32:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:32:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:32:16,838 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 17:32:18,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 17:32:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:32:19,044 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-03-17 17:32:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:32:19,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-17 17:32:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:32:19,046 INFO L225 Difference]: With dead ends: 56 [2022-03-17 17:32:19,046 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 17:32:19,046 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:32:19,047 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:32:19,047 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 17:32:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 17:32:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 17:32:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 17:32:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-03-17 17:32:19,053 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-03-17 17:32:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:32:19,053 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-03-17 17:32:19,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 17:32:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-03-17 17:32:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 17:32:19,054 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:32:19,054 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:32:19,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 17:32:19,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:19,273 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:32:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:32:19,273 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-03-17 17:32:19,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:32:19,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317816479] [2022-03-17 17:32:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:19,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:32:19,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:32:19,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802211210] [2022-03-17 17:32:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:19,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:19,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:32:19,291 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) [2022-03-17 17:32:19,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 17:32:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:19,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 17:32:19,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:32:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 17:32:19,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:32:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 17:32:19,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:32:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317816479] [2022-03-17 17:32:19,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:32:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802211210] [2022-03-17 17:32:19,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802211210] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:32:19,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:32:19,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 17:32:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831356135] [2022-03-17 17:32:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:32:19,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:32:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:32:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:32:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:32:19,983 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:32:22,155 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 [] [2022-03-17 17:32:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:32:22,284 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-17 17:32:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:32:22,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-17 17:32:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:32:22,285 INFO L225 Difference]: With dead ends: 66 [2022-03-17 17:32:22,285 INFO L226 Difference]: Without dead ends: 66 [2022-03-17 17:32:22,286 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-17 17:32:22,286 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-17 17:32:22,286 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-03-17 17:32:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-17 17:32:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-17 17:32:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 17:32:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-03-17 17:32:22,292 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-03-17 17:32:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:32:22,292 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-03-17 17:32:22,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:32:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-03-17 17:32:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 17:32:22,293 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:32:22,293 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:32:22,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 17:32:22,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:22,508 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:32:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:32:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-03-17 17:32:22,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:32:22,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424527954] [2022-03-17 17:32:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:22,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:32:22,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:32:22,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764981431] [2022-03-17 17:32:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:22,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:22,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:32:22,534 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) [2022-03-17 17:32:22,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 17:32:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:22,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 17:32:22,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:32:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 17:32:22,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:32:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 17:32:23,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:32:23,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424527954] [2022-03-17 17:32:23,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:32:23,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764981431] [2022-03-17 17:32:23,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764981431] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:32:23,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:32:23,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-17 17:32:23,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049196321] [2022-03-17 17:32:23,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:32:23,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:32:23,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:32:23,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:32:23,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:32:23,006 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 17:32:25,055 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 [] [2022-03-17 17:32:27,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:32:29,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:32:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:32:29,290 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2022-03-17 17:32:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:32:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2022-03-17 17:32:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:32:29,292 INFO L225 Difference]: With dead ends: 74 [2022-03-17 17:32:29,292 INFO L226 Difference]: Without dead ends: 74 [2022-03-17 17:32:29,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:32:29,294 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-17 17:32:29,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2022-03-17 17:32:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-17 17:32:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-03-17 17:32:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 17:32:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2022-03-17 17:32:29,300 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 55 [2022-03-17 17:32:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:32:29,301 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2022-03-17 17:32:29,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 17:32:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2022-03-17 17:32:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-17 17:32:29,301 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:32:29,302 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:32:29,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 17:32:29,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:29,507 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:32:29,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:32:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-03-17 17:32:29,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:32:29,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123656382] [2022-03-17 17:32:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:29,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:32:29,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:32:29,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904674023] [2022-03-17 17:32:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:29,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:32:29,521 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) [2022-03-17 17:32:29,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 17:32:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:32:29,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 17:32:29,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:32:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-17 17:32:29,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:32:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 17:32:30,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:32:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123656382] [2022-03-17 17:32:30,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:32:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904674023] [2022-03-17 17:32:30,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904674023] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:32:30,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:32:30,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 17:32:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19172536] [2022-03-17 17:32:30,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:32:30,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:32:30,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:32:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:32:30,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:32:30,160 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 17:32:32,247 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 [] [2022-03-17 17:32:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:32:32,423 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-03-17 17:32:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:32:32,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-17 17:32:32,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:32:32,425 INFO L225 Difference]: With dead ends: 76 [2022-03-17 17:32:32,425 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 17:32:32,425 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 17:32:32,426 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:32:32,426 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 162 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 17:32:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 17:32:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-17 17:32:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 43 states have internal predecessors, (49), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 17:32:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-17 17:32:32,431 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-17 17:32:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:32:32,431 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-17 17:32:32,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 17:32:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-17 17:32:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 17:32:32,432 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:32:32,433 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:32:32,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 17:32:32,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:32,633 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:32:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:32:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2022-03-17 17:32:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:32:32,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96530270] [2022-03-17 17:32:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:32,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:32:32,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:32:32,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772488701] [2022-03-17 17:32:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:32:32,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:32:32,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:32:32,646 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) [2022-03-17 17:32:32,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process