/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/dijkstra-u_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:02:00,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:02:00,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:02:00,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:02:00,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:02:00,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:02:00,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:02:00,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:02:00,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:02:00,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:02:00,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:02:00,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:02:00,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:02:00,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:02:00,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:02:00,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:02:00,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:02:00,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:02:00,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:02:00,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:02:00,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:02:00,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:02:00,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:02:00,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:02:00,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:02:00,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:02:00,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:02:00,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:02:00,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:02:00,390 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:02:00,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:02:00,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:02:00,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:02:00,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:02:00,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:02:00,392 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:02:00,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:02:00,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:02:00,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:02:00,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:02:00,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:02:00,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:02:00,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:02:00,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:02:00,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:02:00,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:02:00,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:02:00,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:02:00,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:02:00,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:02:00,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:02:00,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:02:00,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:02:00,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:02:00,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:02:00,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:02:00,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:02:00,397 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:02:00,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:02:00,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:02:00,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:02:00,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:02:00,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:02:00,569 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:02:00,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c [2022-02-23 22:02:00,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6aad4879/e4546f795db5480783ce73f728bc52ef/FLAG3e001ad02 [2022-02-23 22:02:00,978 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:02:00,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c [2022-02-23 22:02:00,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6aad4879/e4546f795db5480783ce73f728bc52ef/FLAG3e001ad02 [2022-02-23 22:02:01,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6aad4879/e4546f795db5480783ce73f728bc52ef [2022-02-23 22:02:01,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:02:01,012 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:02:01,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:02:01,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:02:01,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:02:01,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371c333c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01, skipping insertion in model container [2022-02-23 22:02:01,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:02:01,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:02:01,178 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/dijkstra-u_valuebound2.c[525,538] [2022-02-23 22:02:01,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:02:01,223 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:02:01,233 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c[525,538] [2022-02-23 22:02:01,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:02:01,272 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:02:01,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01 WrapperNode [2022-02-23 22:02:01,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:02:01,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:02:01,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:02:01,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:02:01,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:02:01,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:02:01,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:02:01,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:02:01,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:02:01,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:02:01,357 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) [2022-02-23 22:02:01,358 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 [2022-02-23 22:02:01,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:02:01,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:02:01,387 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:02:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:02:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:02:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:02:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:02:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:02:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:02:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:02:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 22:02:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:02:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:02:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:02:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:02:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:02:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:02:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:02:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:02:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:02:01,438 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:02:01,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:02:01,649 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:02:01,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:02:01,657 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 22:02:01,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:02:01 BoogieIcfgContainer [2022-02-23 22:02:01,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:02:01,659 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:02:01,659 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:02:01,660 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:02:01,663 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:02:01" (1/1) ... [2022-02-23 22:02:01,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:02:01 BasicIcfg [2022-02-23 22:02:01,695 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:02:01,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:02:01,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:02:01,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:02:01,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:02:01" (1/4) ... [2022-02-23 22:02:01,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2809bd1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:02:01, skipping insertion in model container [2022-02-23 22:02:01,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:02:01" (2/4) ... [2022-02-23 22:02:01,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2809bd1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:02:01, skipping insertion in model container [2022-02-23 22:02:01,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:02:01" (3/4) ... [2022-02-23 22:02:01,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2809bd1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:02:01, skipping insertion in model container [2022-02-23 22:02:01,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:02:01" (4/4) ... [2022-02-23 22:02:01,700 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound2.cqvasr [2022-02-23 22:02:01,703 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:02:01,703 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:02:01,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:02:01,794 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:02:01,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:02:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 22:02:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 22:02:01,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:01,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:02:01,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-02-23 22:02:01,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:01,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815439834] [2022-02-23 22:02:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:01,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:02:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:01,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:02:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:01,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:02:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:02:02,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:02:02,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815439834] [2022-02-23 22:02:02,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815439834] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:02:02,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:02:02,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:02:02,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795287806] [2022-02-23 22:02:02,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:02:02,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:02:02,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:02:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:02:02,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:02:02,035 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:02:04,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:06,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:02:06,472 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-02-23 22:02:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:02:06,474 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 22:02:06,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:02:06,479 INFO L225 Difference]: With dead ends: 69 [2022-02-23 22:02:06,479 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 22:02:06,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:02:06,483 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:02:06,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-02-23 22:02:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 22:02:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 22:02:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 22:02:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-02-23 22:02:06,529 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-02-23 22:02:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:02:06,529 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-02-23 22:02:06,529 INFO L471 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:02:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-02-23 22:02:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 22:02:06,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:06,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:02:06,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:02:06,533 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-02-23 22:02:06,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:06,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31332601] [2022-02-23 22:02:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:06,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:06,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:02:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:06,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:02:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:06,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:02:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:02:06,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:02:06,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31332601] [2022-02-23 22:02:06,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31332601] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:02:06,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:02:06,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 22:02:06,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000670831] [2022-02-23 22:02:06,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:02:06,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:02:06,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:02:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:02:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:02:06,705 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:02:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:02:11,352 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-02-23 22:02:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 22:02:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-23 22:02:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:02:11,354 INFO L225 Difference]: With dead ends: 68 [2022-02-23 22:02:11,354 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 22:02:11,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:02:11,356 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:02:11,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-23 22:02:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 22:02:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-23 22:02:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:02:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-23 22:02:11,380 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-02-23 22:02:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:02:11,381 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-23 22:02:11,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:02:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-23 22:02:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 22:02:11,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:11,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:02:11,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 22:02:11,383 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-02-23 22:02:11,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:11,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762533079] [2022-02-23 22:02:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:11,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:11,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:02:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:02:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:11,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:02:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:02:11,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:02:11,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762533079] [2022-02-23 22:02:11,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762533079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:02:11,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577483811] [2022-02-23 22:02:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:11,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:11,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:02:11,607 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) [2022-02-23 22:02:11,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:02:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 22:02:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:02:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:02:11,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:02:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:02:12,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577483811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:02:12,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 22:02:12,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-23 22:02:12,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710563201] [2022-02-23 22:02:12,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 22:02:12,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 22:02:12,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:02:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 22:02:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-23 22:02:12,078 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 22:02:17,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:19,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:21,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:24,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:26,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:28,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:29,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:31,654 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:02:34,094 INFO L93 Difference]: Finished difference Result 82 states and 116 transitions. [2022-02-23 22:02:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:02:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2022-02-23 22:02:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:02:34,096 INFO L225 Difference]: With dead ends: 82 [2022-02-23 22:02:34,096 INFO L226 Difference]: Without dead ends: 62 [2022-02-23 22:02:34,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-23 22:02:34,097 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 138 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2022-02-23 22:02:34,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 93 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 483 Invalid, 5 Unknown, 0 Unchecked, 21.8s Time] [2022-02-23 22:02:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-23 22:02:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-02-23 22:02:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 22:02:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2022-02-23 22:02:34,109 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 26 [2022-02-23 22:02:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:02:34,109 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2022-02-23 22:02:34,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 22:02:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2022-02-23 22:02:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 22:02:34,110 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:34,110 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:02:34,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 22:02:34,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:34,328 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-02-23 22:02:34,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:34,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089738691] [2022-02-23 22:02:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:34,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:34,338 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:02:34,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617481031] [2022-02-23 22:02:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:34,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:02:34,349 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) [2022-02-23 22:02:34,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:02:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:34,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:02:34,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:02:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 22:02:34,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:02:34,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:02:34,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089738691] [2022-02-23 22:02:34,584 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:02:34,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617481031] [2022-02-23 22:02:34,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617481031] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:02:34,584 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:02:34,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:02:34,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557111665] [2022-02-23 22:02:34,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:02:34,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:02:34,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:02:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:02:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:02:34,585 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:02:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:02:35,055 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2022-02-23 22:02:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:02:35,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-02-23 22:02:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:02:35,056 INFO L225 Difference]: With dead ends: 70 [2022-02-23 22:02:35,056 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 22:02:35,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:02:35,057 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:02:35,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 22:02:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 22:02:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-23 22:02:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:02:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-02-23 22:02:35,066 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 34 [2022-02-23 22:02:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:02:35,066 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-02-23 22:02:35,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:02:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-02-23 22:02:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 22:02:35,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:35,067 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:02:35,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 22:02:35,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 22:02:35,272 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-02-23 22:02:35,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:35,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019662056] [2022-02-23 22:02:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:35,288 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:02:35,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854966760] [2022-02-23 22:02:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:35,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:35,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:02:35,292 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) [2022-02-23 22:02:35,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:02:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:02:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:02:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-23 22:02:35,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:02:35,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:02:35,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019662056] [2022-02-23 22:02:35,446 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:02:35,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854966760] [2022-02-23 22:02:35,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854966760] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:02:35,446 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:02:35,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:02:35,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120857989] [2022-02-23 22:02:35,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:02:35,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:02:35,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:02:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:02:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:02:35,448 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:02:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:02:36,156 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-02-23 22:02:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:02:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-23 22:02:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:02:36,158 INFO L225 Difference]: With dead ends: 57 [2022-02-23 22:02:36,158 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 22:02:36,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:02:36,159 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 5 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 22:02:36,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 166 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 22:02:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 22:02:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-23 22:02:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:02:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-23 22:02:36,166 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 36 [2022-02-23 22:02:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:02:36,166 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-23 22:02:36,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:02:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-23 22:02:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-23 22:02:36,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:36,167 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:02:36,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 22:02:36,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:36,370 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:36,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:36,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-02-23 22:02:36,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:36,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084768543] [2022-02-23 22:02:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:36,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:36,394 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:02:36,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326061450] [2022-02-23 22:02:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:36,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:36,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:02:36,398 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) [2022-02-23 22:02:36,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process