/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/prodbin-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 09:02:19,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 09:02:19,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 09:02:19,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 09:02:19,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 09:02:19,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 09:02:19,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 09:02:19,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 09:02:19,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 09:02:19,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 09:02:19,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 09:02:19,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 09:02:19,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 09:02:19,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 09:02:19,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 09:02:19,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 09:02:19,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 09:02:19,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 09:02:19,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 09:02:19,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 09:02:19,350 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 09:02:19,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 09:02:19,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 09:02:19,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 09:02:19,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 09:02:19,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 09:02:19,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 09:02:19,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 09:02:19,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 09:02:19,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 09:02:19,378 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 09:02:19,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 09:02:19,379 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 09:02:19,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 09:02:19,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 09:02:19,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 09:02:19,380 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 09:02:19,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 09:02:19,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 09:02:19,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 09:02:19,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 09:02:19,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:02:19,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 09:02:19,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 09:02:19,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 09:02:19,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 09:02:19,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 09:02:19,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 09:02:19,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 09:02:19,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 09:02:19,382 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 09:02:19,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 09:02:19,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 09:02:19,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 09:02:19,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 09:02:19,524 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 09:02:19,524 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 09:02:19,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound100.c [2022-04-05 09:02:19,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63aa91e35/172a98fe44a3450b9e399d8347712835/FLAGb901b2db4 [2022-04-05 09:02:19,908 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 09:02:19,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound100.c [2022-04-05 09:02:19,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63aa91e35/172a98fe44a3450b9e399d8347712835/FLAGb901b2db4 [2022-04-05 09:02:19,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63aa91e35/172a98fe44a3450b9e399d8347712835 [2022-04-05 09:02:19,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 09:02:19,923 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 09:02:19,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 09:02:19,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 09:02:19,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 09:02:19,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:02:19" (1/1) ... [2022-04-05 09:02:19,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5831b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:19, skipping insertion in model container [2022-04-05 09:02:19,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:02:19" (1/1) ... [2022-04-05 09:02:19,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 09:02:19,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 09:02:20,053 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/prodbin-ll_valuebound100.c[537,550] [2022-04-05 09:02:20,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:02:20,089 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 09:02:20,097 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/prodbin-ll_valuebound100.c[537,550] [2022-04-05 09:02:20,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:02:20,115 INFO L208 MainTranslator]: Completed translation [2022-04-05 09:02:20,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20 WrapperNode [2022-04-05 09:02:20,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 09:02:20,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 09:02:20,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 09:02:20,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 09:02:20,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 09:02:20,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 09:02:20,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 09:02:20,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 09:02:20,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:02:20,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:02:20,162 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) [2022-04-05 09:02:20,167 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 [2022-04-05 09:02:20,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 09:02:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 09:02:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 09:02:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 09:02:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 09:02:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 09:02:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 09:02:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 09:02:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 09:02:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 09:02:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 09:02:20,226 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 09:02:20,227 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 09:02:20,309 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 09:02:20,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 09:02:20,312 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 09:02:20,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:02:20 BoogieIcfgContainer [2022-04-05 09:02:20,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 09:02:20,314 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 09:02:20,314 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 09:02:20,315 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 09:02:20,317 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:02:20" (1/1) ... [2022-04-05 09:02:20,318 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 09:02:20,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:02:20 BasicIcfg [2022-04-05 09:02:20,328 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 09:02:20,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 09:02:20,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 09:02:20,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 09:02:20,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 09:02:19" (1/4) ... [2022-04-05 09:02:20,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d659aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:02:20, skipping insertion in model container [2022-04-05 09:02:20,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:02:20" (2/4) ... [2022-04-05 09:02:20,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d659aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:02:20, skipping insertion in model container [2022-04-05 09:02:20,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:02:20" (3/4) ... [2022-04-05 09:02:20,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d659aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:02:20, skipping insertion in model container [2022-04-05 09:02:20,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:02:20" (4/4) ... [2022-04-05 09:02:20,332 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.cqvasr [2022-04-05 09:02:20,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 09:02:20,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 09:02:20,360 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 09:02:20,364 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 [2022-04-05 09:02:20,364 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 09:02:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 09:02:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 09:02:20,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:02:20,378 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:02:20,378 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:02:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:02:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-04-05 09:02:20,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:02:20,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603321199] [2022-04-05 09:02:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:02:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:02:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:20,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 09:02:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:20,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 09:02:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:20,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 09:02:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 09:02:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:02:20,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603321199] [2022-04-05 09:02:20,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603321199] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:02:20,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:02:20,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 09:02:20,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880677850] [2022-04-05 09:02:20,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:02:20,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 09:02:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:02:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 09:02:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 09:02:20,530 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 09:02:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:02:20,577 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-04-05 09:02:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 09:02:20,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-05 09:02:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:02:20,583 INFO L225 Difference]: With dead ends: 57 [2022-04-05 09:02:20,583 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 09:02:20,585 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 09:02:20,587 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:02:20,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:02:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 09:02:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-05 09:02:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 09:02:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-05 09:02:20,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-04-05 09:02:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:02:20,615 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-05 09:02:20,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 09:02:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-05 09:02:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 09:02:20,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:02:20,617 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:02:20,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 09:02:20,617 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:02:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:02:20,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-04-05 09:02:20,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:02:20,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874346721] [2022-04-05 09:02:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:20,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:02:20,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:02:20,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037064717] [2022-04-05 09:02:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:20,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:02:20,635 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) [2022-04-05 09:02:20,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 09:02:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:20,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 09:02:20,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:02:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 09:02:20,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 09:02:20,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:02:20,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874346721] [2022-04-05 09:02:20,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:02:20,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037064717] [2022-04-05 09:02:20,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037064717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:02:20,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:02:20,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 09:02:20,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400955562] [2022-04-05 09:02:20,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:02:20,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:02:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:02:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:02:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 09:02:20,819 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-05 09:02:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:02:20,874 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-04-05 09:02:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:02:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-05 09:02:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:02:20,885 INFO L225 Difference]: With dead ends: 39 [2022-04-05 09:02:20,885 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 09:02:20,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 09:02:20,886 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:02:20,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:02:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 09:02:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-04-05 09:02:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 09:02:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-05 09:02:20,892 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-04-05 09:02:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:02:20,893 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-05 09:02:20,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-05 09:02:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-05 09:02:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 09:02:20,894 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:02:20,894 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:02:20,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 09:02:21,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:21,095 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:02:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:02:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-04-05 09:02:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:02:21,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542488486] [2022-04-05 09:02:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:21,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:02:21,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:02:21,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657119015] [2022-04-05 09:02:21,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:21,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:02:21,114 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) [2022-04-05 09:02:21,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 09:02:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:21,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 09:02:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:02:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 09:02:21,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 09:02:21,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:02:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542488486] [2022-04-05 09:02:21,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:02:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657119015] [2022-04-05 09:02:21,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657119015] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:02:21,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:02:21,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 09:02:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149121252] [2022-04-05 09:02:21,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:02:21,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 09:02:21,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:02:21,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 09:02:21,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 09:02:21,225 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 09:02:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:02:21,269 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-04-05 09:02:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 09:02:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-05 09:02:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:02:21,270 INFO L225 Difference]: With dead ends: 43 [2022-04-05 09:02:21,270 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 09:02:21,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 09:02:21,272 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:02:21,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:02:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 09:02:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-04-05 09:02:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 09:02:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-05 09:02:21,277 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-04-05 09:02:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:02:21,277 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-05 09:02:21,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 09:02:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-05 09:02:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 09:02:21,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:02:21,278 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:02:21,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 09:02:21,496 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,SelfDestructingSolverStorable2 [2022-04-05 09:02:21,496 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:02:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:02:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-04-05 09:02:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:02:21,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184532479] [2022-04-05 09:02:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:02:21,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:02:21,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498295907] [2022-04-05 09:02:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:02:21,510 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) [2022-04-05 09:02:21,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 09:02:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:21,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 09:02:21,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:02:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 09:02:24,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:02:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 09:02:35,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:02:35,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184532479] [2022-04-05 09:02:35,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:02:35,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498295907] [2022-04-05 09:02:35,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498295907] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 09:02:35,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:02:35,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2022-04-05 09:02:35,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125313129] [2022-04-05 09:02:35,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:02:35,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 09:02:35,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:02:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 09:02:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-05 09:02:35,286 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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) [2022-04-05 09:02:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:02:36,043 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-04-05 09:02:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 09:02:36,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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 37 [2022-04-05 09:02:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:02:36,045 INFO L225 Difference]: With dead ends: 47 [2022-04-05 09:02:36,045 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 09:02:36,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-05 09:02:36,046 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 09:02:36,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 09:02:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 09:02:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-04-05 09:02:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 09:02:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-04-05 09:02:36,052 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 37 [2022-04-05 09:02:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:02:36,053 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-04-05 09:02:36,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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) [2022-04-05 09:02:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-04-05 09:02:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 09:02:36,053 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:02:36,054 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:02:36,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 09:02:36,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:36,268 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:02:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:02:36,268 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-04-05 09:02:36,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:02:36,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245440316] [2022-04-05 09:02:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:36,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:02:36,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:02:36,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245524244] [2022-04-05 09:02:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:36,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:02:36,279 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) [2022-04-05 09:02:36,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 09:02:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:36,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 09:02:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:02:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 09:02:37,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:02:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 09:02:38,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:02:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245440316] [2022-04-05 09:02:38,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:02:38,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245524244] [2022-04-05 09:02:38,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245524244] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:02:38,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:02:38,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-04-05 09:02:38,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345092214] [2022-04-05 09:02:38,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:02:38,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 09:02:38,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:02:38,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 09:02:38,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-05 09:02:38,868 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-05 09:02:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:02:39,832 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2022-04-05 09:02:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 09:02:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-04-05 09:02:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:02:39,834 INFO L225 Difference]: With dead ends: 68 [2022-04-05 09:02:39,835 INFO L226 Difference]: Without dead ends: 61 [2022-04-05 09:02:39,835 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-04-05 09:02:39,836 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 09:02:39,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 105 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 09:02:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-05 09:02:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-05 09:02:39,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 09:02:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-04-05 09:02:39,844 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 37 [2022-04-05 09:02:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:02:39,845 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-04-05 09:02:39,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-05 09:02:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-04-05 09:02:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 09:02:39,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:02:39,846 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:02:39,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 09:02:40,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:40,055 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:02:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:02:40,055 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-04-05 09:02:40,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:02:40,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481855652] [2022-04-05 09:02:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:02:40,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:02:40,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360312652] [2022-04-05 09:02:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:40,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:40,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:02:40,078 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) [2022-04-05 09:02:40,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 09:02:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 09:02:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:02:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 09:02:40,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:02:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 09:02:40,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:02:40,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481855652] [2022-04-05 09:02:40,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:02:40,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360312652] [2022-04-05 09:02:40,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360312652] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:02:40,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:02:40,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-05 09:02:40,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811914375] [2022-04-05 09:02:40,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:02:40,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 09:02:40,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:02:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 09:02:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 09:02:40,309 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-05 09:02:42,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:02:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:02:43,049 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-04-05 09:02:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 09:02:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-04-05 09:02:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:02:43,050 INFO L225 Difference]: With dead ends: 68 [2022-04-05 09:02:43,050 INFO L226 Difference]: Without dead ends: 61 [2022-04-05 09:02:43,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:02:43,051 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-05 09:02:43,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 117 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-04-05 09:02:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-05 09:02:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-04-05 09:02:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 09:02:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-04-05 09:02:43,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 43 [2022-04-05 09:02:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:02:43,057 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-04-05 09:02:43,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-05 09:02:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-04-05 09:02:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 09:02:43,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:02:43,058 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:02:43,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 09:02:43,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:43,259 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:02:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:02:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1353204359, now seen corresponding path program 1 times [2022-04-05 09:02:43,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:02:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929631856] [2022-04-05 09:02:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:43,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:02:43,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:02:43,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055536923] [2022-04-05 09:02:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:02:43,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:02:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:02:43,272 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) [2022-04-05 09:02:43,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 09:02:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:02:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 09:02:43,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:02:43,598 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:02:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-05 09:02:50,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:02:54,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:02:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929631856] [2022-04-05 09:02:54,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:02:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055536923] [2022-04-05 09:02:54,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055536923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:02:54,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:02:54,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-05 09:02:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416190444] [2022-04-05 09:02:54,530 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:02:54,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 09:02:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:02:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 09:02:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=247, Unknown=4, NotChecked=0, Total=306 [2022-04-05 09:02:54,531 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 09:02:57,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:03:00,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:03:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:03:01,451 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-04-05 09:03:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 09:03:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-04-05 09:03:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:03:01,453 INFO L225 Difference]: With dead ends: 88 [2022-04-05 09:03:01,453 INFO L226 Difference]: Without dead ends: 86 [2022-04-05 09:03:01,453 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=66, Invalid=310, Unknown=4, NotChecked=0, Total=380 [2022-04-05 09:03:01,454 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-04-05 09:03:01,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 230 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 230 Invalid, 1 Unknown, 25 Unchecked, 6.9s Time] [2022-04-05 09:03:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-05 09:03:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-04-05 09:03:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 09:03:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-04-05 09:03:01,483 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 46 [2022-04-05 09:03:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:03:01,483 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-04-05 09:03:01,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 09:03:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-04-05 09:03:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 09:03:01,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:03:01,485 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-05 09:03:01,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 09:03:01,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:03:01,685 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:03:01,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:03:01,686 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 2 times [2022-04-05 09:03:01,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:03:01,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318601881] [2022-04-05 09:03:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:03:01,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:03:01,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:03:01,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608856218] [2022-04-05 09:03:01,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:03:01,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:03:01,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:03:01,701 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) [2022-04-05 09:03:01,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 09:03:01,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:03:01,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:03:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 09:03:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:03:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 09:03:30,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:03:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 09:03:41,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:03:41,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318601881] [2022-04-05 09:03:41,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:03:41,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608856218] [2022-04-05 09:03:41,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608856218] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:03:41,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:03:41,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-05 09:03:41,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28900103] [2022-04-05 09:03:41,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:03:41,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 09:03:41,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:03:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 09:03:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=376, Unknown=2, NotChecked=0, Total=462 [2022-04-05 09:03:41,561 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-05 09:03:44,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:03:45,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:03:47,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:10,744 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:12,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:14,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:15,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:18,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:20,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:24,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:04:25,169 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2022-04-05 09:04:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 09:04:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2022-04-05 09:04:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:04:25,171 INFO L225 Difference]: With dead ends: 107 [2022-04-05 09:04:25,171 INFO L226 Difference]: Without dead ends: 105 [2022-04-05 09:04:25,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=170, Invalid=758, Unknown=2, NotChecked=0, Total=930 [2022-04-05 09:04:25,172 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-04-05 09:04:25,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 250 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 415 Invalid, 3 Unknown, 32 Unchecked, 20.3s Time] [2022-04-05 09:04:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-05 09:04:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2022-04-05 09:04:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 09:04:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-04-05 09:04:25,180 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2022-04-05 09:04:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:04:25,180 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-04-05 09:04:25,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-05 09:04:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-04-05 09:04:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 09:04:25,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:04:25,181 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:04:25,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 09:04:25,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:04:25,393 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:04:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:04:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2101955993, now seen corresponding path program 3 times [2022-04-05 09:04:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:04:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272320711] [2022-04-05 09:04:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:04:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:04:25,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:04:25,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558344311] [2022-04-05 09:04:25,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:04:25,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:04:25,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:04:25,403 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) [2022-04-05 09:04:25,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 09:04:25,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 09:04:25,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:04:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-05 09:04:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:04:26,504 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:04:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-05 09:04:27,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:04:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-05 09:04:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:04:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272320711] [2022-04-05 09:04:33,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:04:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558344311] [2022-04-05 09:04:33,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558344311] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:04:33,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:04:33,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 33 [2022-04-05 09:04:33,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099521523] [2022-04-05 09:04:33,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:04:33,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 09:04:33,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:04:33,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 09:04:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 09:04:33,755 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-05 09:04:35,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:44,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:45,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:53,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:54,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:04:56,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:05:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:26,675 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2022-04-05 09:05:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 09:05:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 64 [2022-04-05 09:05:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:26,676 INFO L225 Difference]: With dead ends: 115 [2022-04-05 09:05:26,676 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 09:05:26,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=562, Invalid=2089, Unknown=1, NotChecked=0, Total=2652 [2022-04-05 09:05:26,678 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:26,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 226 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 423 Invalid, 1 Unknown, 24 Unchecked, 15.1s Time] [2022-04-05 09:05:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 09:05:26,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 09:05:26,679 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) [2022-04-05 09:05:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 09:05:26,679 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2022-04-05 09:05:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:26,679 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 09:05:26,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-05 09:05:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 09:05:26,679 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 09:05:26,681 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 09:05:26,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 09:05:26,895 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,SelfDestructingSolverStorable8 [2022-04-05 09:05:26,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 09:05:34,846 WARN L232 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 155 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 09:05:39,314 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|)) [2022-04-05 09:05:39,314 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 09:05:39,314 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 09:05:39,314 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 09:05:39,314 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-05 09:05:39,314 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 09:05:39,314 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 09:05:39,314 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-04-05 09:05:39,315 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-04-05 09:05:39,315 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-04-05 09:05:39,315 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-04-05 09:05:39,315 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 100) (<= 0 main_~b~0)) [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-04-05 09:05:39,315 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (and (<= 0 main_~y~0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= main_~b~0 100) (<= 1 main_~b~0)) [2022-04-05 09:05:39,315 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= 1 main_~b~0))) [2022-04-05 09:05:39,315 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~y~0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= main_~b~0 100) (<= 1 main_~b~0)) [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2022-04-05 09:05:39,315 INFO L882 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-04-05 09:05:39,316 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2022-04-05 09:05:39,316 INFO L882 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-04-05 09:05:39,316 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-04-05 09:05:39,316 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-04-05 09:05:39,316 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-04-05 09:05:39,316 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-04-05 09:05:39,316 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-04-05 09:05:39,316 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-04-05 09:05:39,318 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:39,319 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 09:05:39,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:05:39 BasicIcfg [2022-04-05 09:05:39,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 09:05:39,327 INFO L158 Benchmark]: Toolchain (without parser) took 199403.71ms. Allocated memory was 187.7MB in the beginning and 225.4MB in the end (delta: 37.7MB). Free memory was 136.8MB in the beginning and 127.6MB in the end (delta: 9.2MB). Peak memory consumption was 47.1MB. Max. memory is 8.0GB. [2022-04-05 09:05:39,327 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 187.7MB. Free memory was 153.3MB in the beginning and 153.2MB in the end (delta: 70.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 09:05:39,328 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.06ms. Allocated memory is still 187.7MB. Free memory was 136.7MB in the beginning and 164.0MB in the end (delta: -27.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 09:05:39,328 INFO L158 Benchmark]: Boogie Preprocessor took 23.18ms. Allocated memory is still 187.7MB. Free memory was 164.0MB in the beginning and 162.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:39,328 INFO L158 Benchmark]: RCFGBuilder took 171.74ms. Allocated memory is still 187.7MB. Free memory was 162.5MB in the beginning and 152.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 09:05:39,328 INFO L158 Benchmark]: IcfgTransformer took 14.11ms. Allocated memory is still 187.7MB. Free memory was 152.3MB in the beginning and 151.2MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:39,328 INFO L158 Benchmark]: TraceAbstraction took 198997.87ms. Allocated memory was 187.7MB in the beginning and 225.4MB in the end (delta: 37.7MB). Free memory was 150.7MB in the beginning and 127.6MB in the end (delta: 23.1MB). Peak memory consumption was 61.1MB. Max. memory is 8.0GB. [2022-04-05 09:05:39,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 187.7MB. Free memory was 153.3MB in the beginning and 153.2MB in the end (delta: 70.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 192.06ms. Allocated memory is still 187.7MB. Free memory was 136.7MB in the beginning and 164.0MB in the end (delta: -27.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.18ms. Allocated memory is still 187.7MB. Free memory was 164.0MB in the beginning and 162.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 171.74ms. Allocated memory is still 187.7MB. Free memory was 162.5MB in the beginning and 152.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.11ms. Allocated memory is still 187.7MB. Free memory was 152.3MB in the beginning and 151.2MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 198997.87ms. Allocated memory was 187.7MB in the beginning and 225.4MB in the end (delta: 37.7MB). Free memory was 150.7MB in the beginning and 127.6MB in the end (delta: 23.1MB). Peak memory consumption was 61.1MB. 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: 15]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 199.0s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 108.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 12.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 247 SdHoareTripleChecker+Valid, 46.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 233 mSDsluCounter, 1254 SdHoareTripleChecker+Invalid, 46.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 81 IncrementalHoareTripleChecker+Unchecked, 1032 mSDsCounter, 158 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1546 IncrementalHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 158 mSolverCounterUnsat, 222 mSDtfsCounter, 1546 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 645 GetRequests, 478 SyntacticMatches, 14 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 92.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=8, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 40 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 35 PreInvPairs, 65 NumberOfFragments, 77 HoareAnnotationTreeSize, 35 FomulaSimplifications, 226 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 2945 FormulaSimplificationTreeSizeReductionInter, 12.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 76.0s InterpolantComputationTime, 372 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 594 ConstructedInterpolants, 4 QuantifiedInterpolants, 3947 SizeOfPredicates, 29 NumberOfNonLiveVariables, 964 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 326/443 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: 34]: Loop Invariant Derived loop invariant: ((0 <= y && z + y * x == b * a) && b <= 100) && 1 <= b RESULT: Ultimate proved your program to be correct! [2022-04-05 09:05:39,376 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...