/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:04:18,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:04:18,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:04:18,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:04:18,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:04:18,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:04:18,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:04:18,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:04:18,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:04:18,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:04:18,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:04:18,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:04:18,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:04:18,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:04:18,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:04:18,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:04:18,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:04:18,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:04:18,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:04:18,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:04:18,245 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:04:18,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:04:18,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:04:18,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:04:18,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:04:18,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 11:04:18,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:04:18,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:04:18,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:04:18,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:04:18,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:04:18,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:04:18,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:04:18,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:04:18,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:04:18,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:04:18,302 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:04:18,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:04:18,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:04:18,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:04:18,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:04:18,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:04:18,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:04:18,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:04:18,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:04:18,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:04:18,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:04:18,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:04:18,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:04:18,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:04:18,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:04:18,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:04:18,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:04:18,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:04:18,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:04:18,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:04:18,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:04:18,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:04:18,305 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:04:18,306 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:04:18,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:04:18,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:04:18,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:04:18,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:04:18,601 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:04:18,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c [2022-04-06 11:04:18,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b494015a/20f72487a4874ae680611c164e8fa25c/FLAGbed1bb007 [2022-04-06 11:04:19,037 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:04:19,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c [2022-04-06 11:04:19,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b494015a/20f72487a4874ae680611c164e8fa25c/FLAGbed1bb007 [2022-04-06 11:04:19,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b494015a/20f72487a4874ae680611c164e8fa25c [2022-04-06 11:04:19,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:04:19,458 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:04:19,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:04:19,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:04:19,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:04:19,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558e36a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19, skipping insertion in model container [2022-04-06 11:04:19,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:04:19,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:04:19,721 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_valuebound2.c[588,601] [2022-04-06 11:04:19,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:04:19,778 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:04:19,785 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_valuebound2.c[588,601] [2022-04-06 11:04:19,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:04:19,820 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:04:19,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19 WrapperNode [2022-04-06 11:04:19,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:04:19,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:04:19,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:04:19,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:04:19,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:04:19,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:04:19,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:04:19,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:04:19,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (1/1) ... [2022-04-06 11:04:19,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:04:19,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:19,909 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) [2022-04-06 11:04:19,927 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 [2022-04-06 11:04:19,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:04:19,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:04:19,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:04:19,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:04:19,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:04:19,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:04:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:04:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:04:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:04:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:04:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-04-06 11:04:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:04:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:04:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:04:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:04:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:04:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:04:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:04:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:04:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:04:19,988 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:04:19,990 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:04:20,155 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:04:20,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:04:20,159 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 11:04:20,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:04:20 BoogieIcfgContainer [2022-04-06 11:04:20,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:04:20,166 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:04:20,166 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:04:20,167 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:04:20,168 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:04:20" (1/1) ... [2022-04-06 11:04:20,170 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:04:20,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:04:20 BasicIcfg [2022-04-06 11:04:20,219 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:04:20,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:04:20,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:04:20,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:04:20,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:04:19" (1/4) ... [2022-04-06 11:04:20,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46996d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:04:20, skipping insertion in model container [2022-04-06 11:04:20,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:04:19" (2/4) ... [2022-04-06 11:04:20,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46996d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:04:20, skipping insertion in model container [2022-04-06 11:04:20,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:04:20" (3/4) ... [2022-04-06 11:04:20,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46996d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:04:20, skipping insertion in model container [2022-04-06 11:04:20,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:04:20" (4/4) ... [2022-04-06 11:04:20,225 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound2.cqvasr [2022-04-06 11:04:20,228 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:04:20,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:04:20,283 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:04:20,288 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-04-06 11:04:20,288 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:04:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 11:04:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 11:04:20,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:20,323 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:20,324 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:20,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-04-06 11:04:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:20,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048623164] [2022-04-06 11:04:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:04:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:20,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:04:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:04:20,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:20,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048623164] [2022-04-06 11:04:20,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048623164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:04:20,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:04:20,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:04:20,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379284351] [2022-04-06 11:04:20,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:04:20,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:04:20,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:04:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:04:20,638 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:04:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:20,780 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-04-06 11:04:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:04:20,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 11:04:20,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:20,787 INFO L225 Difference]: With dead ends: 63 [2022-04-06 11:04:20,787 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 11:04:20,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:04:20,803 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:20,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:04:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 11:04:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 11:04:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 11:04:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-04-06 11:04:20,865 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-04-06 11:04:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:20,865 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-04-06 11:04:20,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:04:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-04-06 11:04:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 11:04:20,867 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:20,867 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:20,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:04:20,868 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-04-06 11:04:20,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:20,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395621125] [2022-04-06 11:04:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:20,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:21,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:04:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:21,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:04:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:04:21,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395621125] [2022-04-06 11:04:21,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395621125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:04:21,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:04:21,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 11:04:21,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002758939] [2022-04-06 11:04:21,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:04:21,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:04:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:04:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:04:21,091 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:04:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:21,294 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-04-06 11:04:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:04:21,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 11:04:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:21,296 INFO L225 Difference]: With dead ends: 37 [2022-04-06 11:04:21,297 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 11:04:21,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:04:21,303 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:21,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:04:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 11:04:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 11:04:21,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 11:04:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-06 11:04:21,322 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-04-06 11:04:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:21,322 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-06 11:04:21,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:04:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-06 11:04:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 11:04:21,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:21,323 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:21,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 11:04:21,323 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-04-06 11:04:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:21,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788272150] [2022-04-06 11:04:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:21,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:21,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:21,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099088428] [2022-04-06 11:04:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:21,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:21,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:21,357 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) [2022-04-06 11:04:21,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:04:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:21,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:04:21,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:04:21,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:04:21,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:21,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788272150] [2022-04-06 11:04:21,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:21,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099088428] [2022-04-06 11:04:21,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099088428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:04:21,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:04:21,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:04:21,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538183396] [2022-04-06 11:04:21,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:04:21,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:04:21,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:21,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:04:21,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:04:21,559 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-06 11:04:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:21,642 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-04-06 11:04:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:04:21,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 [2022-04-06 11:04:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:21,643 INFO L225 Difference]: With dead ends: 54 [2022-04-06 11:04:21,644 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 11:04:21,644 INFO L912 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 [2022-04-06 11:04:21,646 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:21,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:04:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 11:04:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-04-06 11:04:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 11:04:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-04-06 11:04:21,692 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-04-06 11:04:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:21,693 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-04-06 11:04:21,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-06 11:04:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-04-06 11:04:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 11:04:21,694 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:21,694 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:21,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:21,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:21,910 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:21,910 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-04-06 11:04:21,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:21,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690593090] [2022-04-06 11:04:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:21,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:21,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:21,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687993563] [2022-04-06 11:04:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:21,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:21,924 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) [2022-04-06 11:04:21,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:04:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:04:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:04:22,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:04:22,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690593090] [2022-04-06 11:04:22,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:22,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687993563] [2022-04-06 11:04:22,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687993563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:04:22,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:04:22,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:04:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518246978] [2022-04-06 11:04:22,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:04:22,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:04:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:04:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:04:22,047 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-06 11:04:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:22,097 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-04-06 11:04:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:04:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 [2022-04-06 11:04:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:22,099 INFO L225 Difference]: With dead ends: 58 [2022-04-06 11:04:22,099 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 11:04:22,099 INFO L912 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 [2022-04-06 11:04:22,101 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:22,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:04:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 11:04:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-04-06 11:04:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 11:04:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-04-06 11:04:22,113 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-04-06 11:04:22,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:22,113 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-04-06 11:04:22,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-06 11:04:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-04-06 11:04:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 11:04:22,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:22,117 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:22,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:22,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 11:04:22,333 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:22,333 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-04-06 11:04:22,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:22,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930043049] [2022-04-06 11:04:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:22,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:22,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:22,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487835771] [2022-04-06 11:04:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:22,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:22,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:22,360 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) [2022-04-06 11:04:22,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:04:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:22,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:04:22,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 11:04:22,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:04:22,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:22,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930043049] [2022-04-06 11:04:22,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:22,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487835771] [2022-04-06 11:04:22,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487835771] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:04:22,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:04:22,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:04:22,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695518265] [2022-04-06 11:04:22,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:04:22,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:04:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:04:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:04:22,496 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:04:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:22,555 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-04-06 11:04:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:04:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 11:04:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:22,557 INFO L225 Difference]: With dead ends: 66 [2022-04-06 11:04:22,557 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 11:04:22,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:04:22,558 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:22,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:04:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 11:04:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 11:04:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 11:04:22,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-04-06 11:04:22,570 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-04-06 11:04:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:22,570 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-04-06 11:04:22,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:04:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-04-06 11:04:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 11:04:22,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:22,572 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:22,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:22,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:22,787 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-04-06 11:04:22,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:22,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498873830] [2022-04-06 11:04:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:22,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:22,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:22,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992427533] [2022-04-06 11:04:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:22,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:22,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:22,801 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) [2022-04-06 11:04:22,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:04:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:22,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 11:04:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:04:23,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:04:23,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:23,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498873830] [2022-04-06 11:04:23,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:23,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992427533] [2022-04-06 11:04:23,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992427533] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:04:23,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:04:23,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 11:04:23,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029486829] [2022-04-06 11:04:23,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:23,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:04:23,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:23,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:04:23,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:04:23,308 INFO L87 Difference]: Start difference. First operand 54 states and 65 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 11:04:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:23,961 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2022-04-06 11:04:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:04:23,961 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-04-06 11:04:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:23,962 INFO L225 Difference]: With dead ends: 77 [2022-04-06 11:04:23,962 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 11:04:23,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:04:23,963 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:23,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 157 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 11:04:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 11:04:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-04-06 11:04:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 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) [2022-04-06 11:04:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-04-06 11:04:23,974 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-04-06 11:04:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:23,974 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-04-06 11:04:23,975 INFO L479 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 11:04:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-04-06 11:04:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 11:04:23,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:23,977 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:23,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:24,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:24,192 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-04-06 11:04:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:24,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708563737] [2022-04-06 11:04:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:24,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:24,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:24,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478283784] [2022-04-06 11:04:24,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:04:24,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:24,203 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) [2022-04-06 11:04:24,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:04:24,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:04:24,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:04:24,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 11:04:24,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 11:04:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 11:04:24,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708563737] [2022-04-06 11:04:24,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478283784] [2022-04-06 11:04:24,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478283784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:04:24,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:04:24,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 11:04:24,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217366503] [2022-04-06 11:04:24,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:24,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:04:24,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:04:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:04:24,504 INFO L87 Difference]: Start difference. First operand 62 states and 71 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 11:04:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:24,646 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-04-06 11:04:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:04:24,647 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2022-04-06 11:04:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:24,648 INFO L225 Difference]: With dead ends: 81 [2022-04-06 11:04:24,648 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 11:04:24,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:04:24,649 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:24,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 197 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:04:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 11:04:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-04-06 11:04:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 11:04:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-04-06 11:04:24,678 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-04-06 11:04:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:24,679 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-04-06 11:04:24,680 INFO L479 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 11:04:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-04-06 11:04:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 11:04:24,684 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:24,684 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:24,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:24,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:24,901 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:24,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-04-06 11:04:24,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:24,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950536524] [2022-04-06 11:04:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:24,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:24,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:24,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031943460] [2022-04-06 11:04:24,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:04:24,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:24,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:24,919 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) [2022-04-06 11:04:24,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:04:24,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-06 11:04:24,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:04:24,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 11:04:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 11:04:25,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 11:04:25,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:25,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950536524] [2022-04-06 11:04:25,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:25,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031943460] [2022-04-06 11:04:25,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031943460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:04:25,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:04:25,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 11:04:25,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312389678] [2022-04-06 11:04:25,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:25,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:04:25,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:04:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:04:25,339 INFO L87 Difference]: Start difference. First operand 70 states and 81 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 11:04:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:25,892 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-04-06 11:04:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:04:25,892 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2022-04-06 11:04:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:25,893 INFO L225 Difference]: With dead ends: 93 [2022-04-06 11:04:25,893 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 11:04:25,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:04:25,894 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:25,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 135 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 11:04:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 11:04:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-04-06 11:04:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 48 states have internal predecessors, (48), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 11:04:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-04-06 11:04:25,901 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-04-06 11:04:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:25,901 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-04-06 11:04:25,901 INFO L479 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 11:04:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-04-06 11:04:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 11:04:25,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:25,902 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:25,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:26,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:26,126 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-04-06 11:04:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:26,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037655514] [2022-04-06 11:04:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:26,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:26,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:26,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195730183] [2022-04-06 11:04:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:26,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:26,179 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) [2022-04-06 11:04:26,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:04:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 11:04:26,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 11:04:26,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:26,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:26,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037655514] [2022-04-06 11:04:26,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:26,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195730183] [2022-04-06 11:04:26,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195730183] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:04:26,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:04:26,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 11:04:26,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15398785] [2022-04-06 11:04:26,881 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:26,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 11:04:26,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:26,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 11:04:26,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:04:26,881 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2022-04-06 11:04:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:27,162 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2022-04-06 11:04:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:04:27,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 75 [2022-04-06 11:04:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:27,166 INFO L225 Difference]: With dead ends: 95 [2022-04-06 11:04:27,166 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 11:04:27,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:04:27,167 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:27,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 162 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:04:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 11:04:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-04-06 11:04:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 11:04:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-04-06 11:04:27,199 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-04-06 11:04:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:27,200 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-04-06 11:04:27,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2022-04-06 11:04:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-04-06 11:04:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 11:04:27,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:27,201 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:27,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:27,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:27,416 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-04-06 11:04:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:27,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478417868] [2022-04-06 11:04:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:27,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:27,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:27,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326004669] [2022-04-06 11:04:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:27,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:27,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:27,437 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) [2022-04-06 11:04:27,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:04:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:04:27,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 11:04:27,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 11:04:28,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:35,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478417868] [2022-04-06 11:04:35,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326004669] [2022-04-06 11:04:35,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326004669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:04:35,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:04:35,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-06 11:04:35,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348044686] [2022-04-06 11:04:35,737 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:35,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 11:04:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 11:04:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-04-06 11:04:35,738 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 11:04:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:36,879 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2022-04-06 11:04:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 11:04:36,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 80 [2022-04-06 11:04:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:36,880 INFO L225 Difference]: With dead ends: 103 [2022-04-06 11:04:36,880 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 11:04:36,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-04-06 11:04:36,881 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:36,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 153 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 11:04:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 11:04:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 11:04:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 11:04:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-04-06 11:04:36,891 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-04-06 11:04:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:36,891 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-04-06 11:04:36,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 11:04:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-04-06 11:04:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 11:04:36,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:36,892 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:36,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:37,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 11:04:37,093 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:37,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:37,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-04-06 11:04:37,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:37,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810032226] [2022-04-06 11:04:37,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:37,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:37,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:37,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357043473] [2022-04-06 11:04:37,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 11:04:37,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:37,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:37,108 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) [2022-04-06 11:04:37,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:04:37,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 11:04:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:04:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 11:04:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 11:04:37,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 11:04:37,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810032226] [2022-04-06 11:04:37,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357043473] [2022-04-06 11:04:37,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357043473] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:04:37,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:04:37,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 11:04:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295075125] [2022-04-06 11:04:37,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:37,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:04:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:04:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:04:37,661 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-04-06 11:04:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:38,144 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2022-04-06 11:04:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 11:04:38,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 81 [2022-04-06 11:04:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:38,146 INFO L225 Difference]: With dead ends: 106 [2022-04-06 11:04:38,146 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 11:04:38,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:04:38,146 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:38,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 11:04:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 11:04:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-04-06 11:04:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 11:04:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-04-06 11:04:38,161 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-04-06 11:04:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:38,162 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-04-06 11:04:38,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-04-06 11:04:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-04-06 11:04:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 11:04:38,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:38,166 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 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, 1, 1, 1, 1] [2022-04-06 11:04:38,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:38,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:38,384 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-04-06 11:04:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:38,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515357149] [2022-04-06 11:04:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:38,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:38,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:38,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303385218] [2022-04-06 11:04:38,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:04:38,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:38,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:38,415 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) [2022-04-06 11:04:38,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 11:04:38,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:04:38,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:04:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 11:04:38,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 11:04:38,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:39,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515357149] [2022-04-06 11:04:39,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:39,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303385218] [2022-04-06 11:04:39,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303385218] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:04:39,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:04:39,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 11:04:39,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884535291] [2022-04-06 11:04:39,296 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:39,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:04:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:04:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:04:39,297 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-04-06 11:04:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:39,469 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2022-04-06 11:04:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 11:04:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 102 [2022-04-06 11:04:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:39,470 INFO L225 Difference]: With dead ends: 118 [2022-04-06 11:04:39,470 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 11:04:39,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:04:39,471 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:39,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 198 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:04:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 11:04:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-04-06 11:04:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 11:04:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-04-06 11:04:39,483 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-04-06 11:04:39,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:39,484 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-04-06 11:04:39,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-04-06 11:04:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-04-06 11:04:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 11:04:39,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:39,485 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:39,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:39,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 11:04:39,700 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-04-06 11:04:39,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:39,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720392617] [2022-04-06 11:04:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:39,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:39,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142540606] [2022-04-06 11:04:39,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:04:39,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:39,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:39,713 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) [2022-04-06 11:04:39,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 11:04:39,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:04:39,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:04:39,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 11:04:39,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 11:04:40,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:40,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:40,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720392617] [2022-04-06 11:04:40,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:40,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142540606] [2022-04-06 11:04:40,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142540606] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:04:40,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:04:40,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 11:04:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190492235] [2022-04-06 11:04:40,307 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:40,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:04:40,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:04:40,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:04:40,308 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 11:04:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:40,451 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-04-06 11:04:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 11:04:40,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-04-06 11:04:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:40,452 INFO L225 Difference]: With dead ends: 126 [2022-04-06 11:04:40,452 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 11:04:40,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:04:40,453 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:40,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:04:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 11:04:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-04-06 11:04:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 26 states have call successors, (26), 20 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 11:04:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-04-06 11:04:40,465 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-04-06 11:04:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:40,466 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-04-06 11:04:40,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 11:04:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-04-06 11:04:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 11:04:40,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:40,467 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 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, 1, 1, 1, 1] [2022-04-06 11:04:40,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:40,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 11:04:40,672 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-04-06 11:04:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:40,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046777482] [2022-04-06 11:04:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:40,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:40,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:40,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065749805] [2022-04-06 11:04:40,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:04:40,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:40,680 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) [2022-04-06 11:04:40,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 11:04:40,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 11:04:40,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:04:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 11:04:40,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-04-06 11:04:41,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-04-06 11:04:42,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:42,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046777482] [2022-04-06 11:04:42,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:42,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065749805] [2022-04-06 11:04:42,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065749805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:04:42,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:04:42,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-04-06 11:04:42,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724067869] [2022-04-06 11:04:42,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:42,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 11:04:42,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:42,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 11:04:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 11:04:42,378 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) [2022-04-06 11:04:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:43,055 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-04-06 11:04:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:04:43,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) Word has length 129 [2022-04-06 11:04:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:43,056 INFO L225 Difference]: With dead ends: 119 [2022-04-06 11:04:43,056 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 11:04:43,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-04-06 11:04:43,056 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:43,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 114 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 11:04:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 11:04:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-06 11:04:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 26 states have call successors, (26), 21 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 11:04:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-04-06 11:04:43,067 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-04-06 11:04:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:43,067 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-04-06 11:04:43,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) [2022-04-06 11:04:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-04-06 11:04:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 11:04:43,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:04:43,068 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 11:04:43,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 11:04:43,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 11:04:43,269 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:04:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:04:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-04-06 11:04:43,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:04:43,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620579201] [2022-04-06 11:04:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:04:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:04:43,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:04:43,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386778378] [2022-04-06 11:04:43,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:04:43,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:04:43,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:04:43,285 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) [2022-04-06 11:04:43,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 11:04:43,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 11:04:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:04:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 11:04:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:04:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 11:04:44,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:04:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-04-06 11:04:45,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:04:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620579201] [2022-04-06 11:04:45,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:04:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386778378] [2022-04-06 11:04:45,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386778378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:04:45,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:04:45,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 11:04:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487727356] [2022-04-06 11:04:45,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:04:45,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 11:04:45,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:04:45,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 11:04:45,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 11:04:45,589 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-04-06 11:04:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:04:46,460 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-04-06 11:04:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 11:04:46,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 134 [2022-04-06 11:04:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:04:46,461 INFO L225 Difference]: With dead ends: 115 [2022-04-06 11:04:46,461 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 11:04:46,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-04-06 11:04:46,463 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 11:04:46,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 104 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 11:04:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 11:04:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 11:04:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 11:04:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 11:04:46,464 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-04-06 11:04:46,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:04:46,464 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 11:04:46,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-04-06 11:04:46,464 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 11:04:46,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 11:04:46,466 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 11:04:46,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 11:04:46,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 11:04:46,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 11:04:49,386 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 11:04:49,386 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 11:04:49,387 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 11:04:49,387 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 11:04:49,387 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 11:04:49,387 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 11:04:49,387 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 11:04:49,387 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 11:04:49,387 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-06 11:04:49,387 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-06 11:04:49,387 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-06 11:04:49,387 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 56) the Hoare annotation is: true [2022-04-06 11:04:49,387 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* (- 1) main_~a~0))) (or (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ .cse0 32767) 65536))) (and (<= 0 (+ 65536 main_~a~0)) (< (div (+ main_~a~0 32768) (- 65536)) (+ (div (+ (- 1) .cse0) 65536) 1)) (< main_~a~0 0)))) [2022-04-06 11:04:49,387 INFO L882 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2022-04-06 11:04:49,387 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-04-06 11:04:49,387 INFO L878 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (<= .cse1 (+ main_~a~0 1)) (< main_~a~0 .cse1))))) [2022-04-06 11:04:49,387 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-04-06 11:04:49,387 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (<= .cse1 (+ main_~a~0 1)) (< main_~a~0 .cse1))))) [2022-04-06 11:04:49,387 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-04-06 11:04:49,388 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (or (let ((.cse0 (* main_~n~0 main_~n~0)) (.cse1 (* main_~n~0 main_~n~0 main_~n~0)) (.cse2 (div (+ main_~z~0 (- 6)) 6))) (and (= (+ (* 3 .cse0) .cse1 (* main_~n~0 3) 1) (+ main_~y~0 main_~x~0)) (= (+ main_~z~0 main_~x~0 (* main_~y~0 2)) (+ (* main_~n~0 12) .cse1 (* 6 .cse0) 8)) (<= 0 main_~a~0) (<= main_~a~0 2) (<= .cse2 (+ main_~a~0 1)) (= .cse1 main_~x~0) (< main_~a~0 .cse2))) (and (= main_~x~0 0) (= main_~y~0 1) (= (+ (* main_~n~0 6) 6) main_~z~0) (= main_~z~0 6))) [2022-04-06 11:04:49,388 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-04-06 11:04:49,388 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-04-06 11:04:49,388 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-04-06 11:04:49,388 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-04-06 11:04:49,388 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-04-06 11:04:49,388 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-04-06 11:04:49,388 INFO L882 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2022-04-06 11:04:49,388 INFO L882 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-04-06 11:04:49,388 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 56) no Hoare annotation was computed. [2022-04-06 11:04:49,388 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 56) no Hoare annotation was computed. [2022-04-06 11:04:49,388 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 11:04:49,388 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-04-06 11:04:49,388 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-04-06 11:04:49,388 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-04-06 11:04:49,388 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-04-06 11:04:49,389 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-04-06 11:04:49,390 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-04-06 11:04:49,391 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 11:04:49,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:04:49 BasicIcfg [2022-04-06 11:04:49,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 11:04:49,403 INFO L158 Benchmark]: Toolchain (without parser) took 29944.43ms. Allocated memory was 169.9MB in the beginning and 363.9MB in the end (delta: 194.0MB). Free memory was 115.0MB in the beginning and 323.7MB in the end (delta: -208.6MB). Peak memory consumption was 184.2MB. Max. memory is 8.0GB. [2022-04-06 11:04:49,403 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 169.9MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 11:04:49,404 INFO L158 Benchmark]: CACSL2BoogieTranslator took 356.32ms. Allocated memory was 169.9MB in the beginning and 303.0MB in the end (delta: 133.2MB). Free memory was 114.9MB in the beginning and 276.6MB in the end (delta: -161.7MB). Peak memory consumption was 6.9MB. Max. memory is 8.0GB. [2022-04-06 11:04:49,404 INFO L158 Benchmark]: Boogie Preprocessor took 40.23ms. Allocated memory is still 303.0MB. Free memory was 276.6MB in the beginning and 275.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 11:04:49,404 INFO L158 Benchmark]: RCFGBuilder took 298.37ms. Allocated memory is still 303.0MB. Free memory was 275.2MB in the beginning and 264.1MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 11:04:49,405 INFO L158 Benchmark]: IcfgTransformer took 53.58ms. Allocated memory is still 303.0MB. Free memory was 264.1MB in the beginning and 262.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 11:04:49,406 INFO L158 Benchmark]: TraceAbstraction took 29181.93ms. Allocated memory was 303.0MB in the beginning and 363.9MB in the end (delta: 60.8MB). Free memory was 262.0MB in the beginning and 323.7MB in the end (delta: -61.6MB). Peak memory consumption was 197.8MB. Max. memory is 8.0GB. [2022-04-06 11:04:49,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 169.9MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 356.32ms. Allocated memory was 169.9MB in the beginning and 303.0MB in the end (delta: 133.2MB). Free memory was 114.9MB in the beginning and 276.6MB in the end (delta: -161.7MB). Peak memory consumption was 6.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.23ms. Allocated memory is still 303.0MB. Free memory was 276.6MB in the beginning and 275.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 298.37ms. Allocated memory is still 303.0MB. Free memory was 275.2MB in the beginning and 264.1MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 53.58ms. Allocated memory is still 303.0MB. Free memory was 264.1MB in the beginning and 262.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 29181.93ms. Allocated memory was 303.0MB in the beginning and 363.9MB in the end (delta: 60.8MB). Free memory was 262.0MB in the beginning and 323.7MB in the end (delta: -61.6MB). Peak memory consumption was 197.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.1s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 239 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 175 mSDsluCounter, 2075 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1473 mSDsCounter, 380 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2425 IncrementalHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 380 mSolverCounterUnsat, 602 mSDtfsCounter, 2425 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1659 GetRequests, 1495 SyntacticMatches, 11 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=12, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 54 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 70 PreInvPairs, 115 NumberOfFragments, 626 HoareAnnotationTreeSize, 70 FomulaSimplifications, 2358 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 19 FomulaSimplificationsInter, 28644 FormulaSimplificationTreeSizeReductionInter, 2.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 985 NumberOfCodeBlocks, 797 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1470 ConstructedInterpolants, 0 QuantifiedInterpolants, 5554 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1925 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 6543/6798 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((n <= a + 1 && n * 6 + 6 == z) && 0 <= a) && 3 * (n * n) + n * 3 + 1 == y) && a <= 2) && n * n * n == x RESULT: Ultimate proved your program to be correct! [2022-04-06 11:04:49,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...