/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/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 21:38:12,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 21:38:12,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 21:38:12,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 21:38:12,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 21:38:12,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 21:38:12,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 21:38:12,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 21:38:12,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 21:38:12,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 21:38:12,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 21:38:12,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 21:38:12,330 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 21:38:12,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 21:38:12,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 21:38:12,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 21:38:12,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 21:38:12,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 21:38:12,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 21:38:12,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 21:38:12,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 21:38:12,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 21:38:12,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 21:38:12,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 21:38:12,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 21:38:12,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 21:38:12,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 21:38:12,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 21:38:12,364 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 21:38:12,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 21:38:12,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 21:38:12,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 21:38:12,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 21:38:12,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 21:38:12,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 21:38:12,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 21:38:12,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 21:38:12,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 21:38:12,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 21:38:12,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 21:38:12,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 21:38:12,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:38:12,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 21:38:12,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 21:38:12,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 21:38:12,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 21:38:12,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 21:38:12,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 21:38:12,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 21:38:12,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 21:38:12,368 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 21:38:12,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 21:38:12,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 21:38:12,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 21:38:12,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 21:38:12,581 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 21:38:12,581 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 21:38:12,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2022-03-18 21:38:12,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2506e8f16/6e2726194325412ab805985c8d78b89e/FLAG0ac6d0e14 [2022-03-18 21:38:12,970 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 21:38:12,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i [2022-03-18 21:38:12,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2506e8f16/6e2726194325412ab805985c8d78b89e/FLAG0ac6d0e14 [2022-03-18 21:38:12,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2506e8f16/6e2726194325412ab805985c8d78b89e [2022-03-18 21:38:12,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 21:38:12,989 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 21:38:12,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 21:38:12,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 21:38:13,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 21:38:13,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:38:12" (1/1) ... [2022-03-18 21:38:13,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f182429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13, skipping insertion in model container [2022-03-18 21:38:13,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:38:12" (1/1) ... [2022-03-18 21:38:13,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 21:38:13,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 21:38:13,141 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i[938,951] [2022-03-18 21:38:13,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:38:13,173 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 21:38:13,181 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i[938,951] [2022-03-18 21:38:13,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:38:13,200 INFO L208 MainTranslator]: Completed translation [2022-03-18 21:38:13,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13 WrapperNode [2022-03-18 21:38:13,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 21:38:13,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 21:38:13,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 21:38:13,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 21:38:13,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 21:38:13,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 21:38:13,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 21:38:13,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 21:38:13,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:38:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:38:13,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 21:38:13,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 21:38:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 21:38:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 21:38:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 21:38:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 21:38:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 21:38:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 21:38:13,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 21:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 21:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 21:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 21:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 21:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 21:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 21:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 21:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 21:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 21:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 21:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 21:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 21:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 21:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 21:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 21:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 21:38:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 21:38:13,345 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 21:38:13,347 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 21:38:13,497 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 21:38:13,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 21:38:13,502 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-18 21:38:13,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:38:13 BoogieIcfgContainer [2022-03-18 21:38:13,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 21:38:13,505 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 21:38:13,505 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 21:38:13,506 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 21:38:13,508 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:38:13" (1/1) ... [2022-03-18 21:38:13,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:38:13 BasicIcfg [2022-03-18 21:38:13,527 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 21:38:13,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 21:38:13,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 21:38:13,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 21:38:13,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 09:38:12" (1/4) ... [2022-03-18 21:38:13,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219f0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:38:13, skipping insertion in model container [2022-03-18 21:38:13,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:38:13" (2/4) ... [2022-03-18 21:38:13,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219f0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:38:13, skipping insertion in model container [2022-03-18 21:38:13,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:38:13" (3/4) ... [2022-03-18 21:38:13,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219f0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:38:13, skipping insertion in model container [2022-03-18 21:38:13,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:38:13" (4/4) ... [2022-03-18 21:38:13,534 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.iqvasr [2022-03-18 21:38:13,538 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 21:38:13,538 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 21:38:13,574 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 21:38:13,590 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 [2022-03-18 21:38:13,590 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 21:38:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 21:38:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 21:38:13,619 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:38:13,619 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:38:13,620 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:38:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:38:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1114027626, now seen corresponding path program 1 times [2022-03-18 21:38:13,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:38:13,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999565590] [2022-03-18 21:38:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:38:13,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:38:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:13,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:38:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:38:13,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:38:13,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999565590] [2022-03-18 21:38:13,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999565590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:38:13,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:38:13,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 21:38:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472748382] [2022-03-18 21:38:13,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:38:13,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 21:38:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:38:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 21:38:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 21:38:13,821 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:38:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:38:13,852 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-03-18 21:38:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 21:38:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 21:38:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:38:13,859 INFO L225 Difference]: With dead ends: 55 [2022-03-18 21:38:13,859 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 21:38:13,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 21:38:13,864 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:38:13,865 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:38:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 21:38:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 21:38:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 21:38:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-18 21:38:13,908 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-03-18 21:38:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:38:13,908 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-18 21:38:13,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:38:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-18 21:38:13,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 21:38:13,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:38:13,910 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:38:13,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 21:38:13,910 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:38:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:38:13,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2033978408, now seen corresponding path program 1 times [2022-03-18 21:38:13,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:38:13,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538660906] [2022-03-18 21:38:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:38:13,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:38:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:14,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:38:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:38:14,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:38:14,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538660906] [2022-03-18 21:38:14,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538660906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:38:14,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:38:14,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 21:38:14,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386358140] [2022-03-18 21:38:14,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:38:14,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 21:38:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:38:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 21:38:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 21:38:14,166 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:38:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:38:14,333 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-03-18 21:38:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 21:38:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 21:38:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:38:14,337 INFO L225 Difference]: With dead ends: 62 [2022-03-18 21:38:14,338 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 21:38:14,343 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-18 21:38:14,344 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:38:14,344 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 30 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:38:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 21:38:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-18 21:38:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 21:38:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-18 21:38:14,353 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2022-03-18 21:38:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:38:14,353 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-18 21:38:14,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:38:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-18 21:38:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 21:38:14,354 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:38:14,354 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:38:14,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 21:38:14,354 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:38:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:38:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1179844468, now seen corresponding path program 1 times [2022-03-18 21:38:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:38:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75422217] [2022-03-18 21:38:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:38:14,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:38:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:15,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:38:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 21:38:15,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:38:15,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75422217] [2022-03-18 21:38:15,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75422217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:38:15,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381522655] [2022-03-18 21:38:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:38:15,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:38:15,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:38:15,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:38:15,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 21:38:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 21:38:15,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:38:15,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-03-18 21:38:15,364 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-18 21:38:15,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2022-03-18 21:38:15,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:15,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-03-18 21:38:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 21:38:15,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:38:15,601 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:15,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 332 treesize of output 312 [2022-03-18 21:38:17,674 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:17,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-18 21:38:17,774 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-03-18 21:38:17,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-18 21:38:18,803 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:18,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-18 21:38:18,886 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-03-18 21:38:18,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-18 21:38:18,926 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-03-18 21:38:18,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 71 [2022-03-18 21:38:18,975 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-18 21:38:18,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2022-03-18 21:38:19,653 INFO L356 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-03-18 21:38:19,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 78 [2022-03-18 21:38:20,242 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-18 21:38:20,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 1 [2022-03-18 21:38:20,559 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-18 21:38:20,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 1 [2022-03-18 21:38:21,014 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-18 21:38:21,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 1 [2022-03-18 21:38:21,058 INFO L356 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-03-18 21:38:21,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 121 [2022-03-18 21:38:22,971 INFO L356 Elim1Store]: treesize reduction 44, result has 71.2 percent of original size [2022-03-18 21:38:22,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 282 treesize of output 220 [2022-03-18 21:38:23,234 INFO L356 Elim1Store]: treesize reduction 33, result has 74.4 percent of original size [2022-03-18 21:38:23,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 240 treesize of output 205 [2022-03-18 21:38:24,136 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:24,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2022-03-18 21:38:24,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 21:38:24,284 INFO L356 Elim1Store]: treesize reduction 53, result has 72.3 percent of original size [2022-03-18 21:38:24,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 237 treesize of output 269 [2022-03-18 21:38:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,423 INFO L356 Elim1Store]: treesize reduction 128, result has 16.3 percent of original size [2022-03-18 21:38:24,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 160 treesize of output 79 [2022-03-18 21:38:24,436 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-18 21:38:24,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 1 [2022-03-18 21:38:24,444 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-18 21:38:24,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 1 [2022-03-18 21:38:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,457 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-03-18 21:38:24,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 1 [2022-03-18 21:38:24,465 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-18 21:38:24,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 1 [2022-03-18 21:38:24,471 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-18 21:38:24,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 1 [2022-03-18 21:38:24,481 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-18 21:38:24,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 377 treesize of output 1 [2022-03-18 21:38:24,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,493 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-03-18 21:38:24,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 1 [2022-03-18 21:38:24,543 INFO L356 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-03-18 21:38:24,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 1 [2022-03-18 21:38:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,566 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-03-18 21:38:24,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 1 [2022-03-18 21:38:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-03-18 21:38:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2022-03-18 21:38:24,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,590 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-03-18 21:38:24,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 1 [2022-03-18 21:38:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 21:38:24,609 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-03-18 21:38:24,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2022-03-18 21:38:24,617 INFO L356 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-03-18 21:38:24,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 1 [2022-03-18 21:38:24,625 INFO L356 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-03-18 21:38:24,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 1 [2022-03-18 21:38:24,634 INFO L356 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-03-18 21:38:24,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 1 [2022-03-18 21:38:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 21:38:24,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381522655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:38:24,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:38:24,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-18 21:38:24,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246584634] [2022-03-18 21:38:24,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:38:24,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 21:38:24,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:38:24,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 21:38:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-18 21:38:24,739 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:38:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:38:25,116 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-03-18 21:38:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 21:38:25,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 21:38:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:38:25,118 INFO L225 Difference]: With dead ends: 45 [2022-03-18 21:38:25,118 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 21:38:25,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-03-18 21:38:25,120 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:38:25,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 54 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 21:38:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 21:38:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-03-18 21:38:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 21:38:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-18 21:38:25,127 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2022-03-18 21:38:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:38:25,127 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-18 21:38:25,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:38:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-18 21:38:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 21:38:25,128 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:38:25,128 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-18 21:38:25,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 21:38:25,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:38:25,344 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:38:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:38:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1769858614, now seen corresponding path program 1 times [2022-03-18 21:38:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:38:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117901951] [2022-03-18 21:38:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:38:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:38:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:25,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:38:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:25,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 21:38:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 21:38:25,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:38:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117901951] [2022-03-18 21:38:25,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117901951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:38:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421227260] [2022-03-18 21:38:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:38:25,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:38:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:38:25,512 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:38:25,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 21:38:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 21:38:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:38:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 21:38:25,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:38:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 21:38:42,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421227260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:38:42,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:38:42,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-03-18 21:38:42,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306773360] [2022-03-18 21:38:42,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:38:42,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 21:38:42,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:38:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 21:38:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=109, Unknown=6, NotChecked=0, Total=156 [2022-03-18 21:38:42,015 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 21:38:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:38:42,275 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-03-18 21:38:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 21:38:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-18 21:38:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:38:42,278 INFO L225 Difference]: With dead ends: 83 [2022-03-18 21:38:42,278 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 21:38:42,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=89, Invalid=247, Unknown=6, NotChecked=0, Total=342 [2022-03-18 21:38:42,279 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 86 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:38:42,279 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 46 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-03-18 21:38:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 21:38:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-03-18 21:38:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 21:38:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-03-18 21:38:42,285 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 33 [2022-03-18 21:38:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:38:42,286 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-03-18 21:38:42,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 21:38:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-03-18 21:38:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 21:38:42,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:38:42,287 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-18 21:38:42,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 21:38:42,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 21:38:42,487 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:38:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:38:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1140994972, now seen corresponding path program 2 times [2022-03-18 21:38:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:38:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194282878] [2022-03-18 21:38:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:38:42,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:38:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:38:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:42,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 21:38:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 21:38:42,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:38:42,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194282878] [2022-03-18 21:38:42,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194282878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:38:42,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10178625] [2022-03-18 21:38:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 21:38:42,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:38:42,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:38:42,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:38:42,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 21:38:42,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 21:38:42,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:38:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 21:38:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:38:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 21:38:42,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:38:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 21:38:42,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10178625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:38:42,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:38:42,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-03-18 21:38:42,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415001618] [2022-03-18 21:38:42,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:38:42,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 21:38:42,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:38:42,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 21:38:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 21:38:42,948 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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) [2022-03-18 21:38:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:38:43,292 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2022-03-18 21:38:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 21:38:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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 36 [2022-03-18 21:38:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:38:43,293 INFO L225 Difference]: With dead ends: 83 [2022-03-18 21:38:43,293 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 21:38:43,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-18 21:38:43,295 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 127 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:38:43,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 54 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 21:38:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 21:38:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2022-03-18 21:38:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 21:38:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-03-18 21:38:43,302 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2022-03-18 21:38:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:38:43,303 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-03-18 21:38:43,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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) [2022-03-18 21:38:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-03-18 21:38:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 21:38:43,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:38:43,304 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:38:43,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 21:38:43,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:38:43,520 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:38:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:38:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1497787256, now seen corresponding path program 3 times [2022-03-18 21:38:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:38:43,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971809625] [2022-03-18 21:38:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:38:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:38:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:38:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 21:38:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:38:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:38:44,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:38:44,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971809625] [2022-03-18 21:38:44,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971809625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:38:44,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332462370] [2022-03-18 21:38:44,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 21:38:44,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:38:44,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:38:44,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:38:44,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 21:38:44,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 21:38:44,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:38:44,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 21:38:44,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:38:44,728 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-18 21:38:44,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-03-18 21:38:44,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-18 21:38:44,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-18 21:38:44,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-18 21:38:44,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-18 21:38:44,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2022-03-18 21:38:53,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 17 [2022-03-18 21:38:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:38:53,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:38:58,641 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#C~0.offset| Int)) (let ((.cse1 (let ((.cse2 (* (mod c_main_~i~0 4294967296) 4))) (store (select |c_#memory_int| |c_main_~#C~0.base|) (+ .cse2 |main_~#C~0.offset|) (+ (select (select |c_#memory_int| |c_main_~#B~0.base|) (+ .cse2 |c_main_~#B~0.offset|)) (select (select |c_#memory_int| |c_main_~#A~0.base|) (+ .cse2 |c_main_~#A~0.offset|))))))) (= (let ((.cse0 (store |c_#memory_int| |c_main_~#C~0.base| .cse1))) (+ (select (select .cse0 |c_main_~#A~0.base|) (+ 4 |c_main_~#A~0.offset|)) (select (select .cse0 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4)))) (select .cse1 (+ |main_~#C~0.offset| 4))))) is different from false [2022-03-18 21:38:59,637 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#C~0.offset| Int)) (let ((.cse0 (let ((.cse2 (* (mod (+ c_main_~i~0 1) 4294967296) 4))) (store (select |c_#memory_int| |c_main_~#C~0.base|) (+ .cse2 |main_~#C~0.offset|) (+ (select (select |c_#memory_int| |c_main_~#A~0.base|) (+ .cse2 |c_main_~#A~0.offset|)) (select (select |c_#memory_int| |c_main_~#B~0.base|) (+ .cse2 |c_main_~#B~0.offset|))))))) (= (select .cse0 (+ |main_~#C~0.offset| 4)) (let ((.cse1 (store |c_#memory_int| |c_main_~#C~0.base| .cse0))) (+ (select (select .cse1 |c_main_~#A~0.base|) (+ 4 |c_main_~#A~0.offset|)) (select (select .cse1 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4))))))) is different from false [2022-03-18 21:38:59,650 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#C~0.offset| Int) (v_ArrVal_168 (Array Int Int))) (let ((.cse1 (let ((.cse2 (* (mod (+ c_main_~i~0 1) 4294967296) 4))) (store v_ArrVal_168 (+ .cse2 |main_~#C~0.offset|) (let ((.cse3 (store |c_#memory_int| |c_main_~#C~0.base| v_ArrVal_168))) (+ (select (select .cse3 |c_main_~#A~0.base|) (+ .cse2 |c_main_~#A~0.offset|)) (select (select .cse3 |c_main_~#B~0.base|) (+ .cse2 |c_main_~#B~0.offset|)))))))) (= (let ((.cse0 (store |c_#memory_int| |c_main_~#C~0.base| .cse1))) (+ (select (select .cse0 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4)) (select (select .cse0 |c_main_~#A~0.base|) (+ 4 |c_main_~#A~0.offset|)))) (select .cse1 (+ |main_~#C~0.offset| 4))))) is different from false [2022-03-18 21:38:59,661 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#C~0.offset| Int) (v_ArrVal_168 (Array Int Int))) (let ((.cse2 (+ |c_main_~#B~0.offset| 4)) (.cse3 (+ 4 |c_main_~#A~0.offset|))) (let ((.cse0 (let ((.cse4 (store |c_#memory_int| |c_main_~#C~0.base| v_ArrVal_168))) (+ (select (select .cse4 |c_main_~#B~0.base|) .cse2) (select (select .cse4 |c_main_~#A~0.base|) .cse3))))) (= .cse0 (let ((.cse1 (store |c_#memory_int| |c_main_~#C~0.base| (store v_ArrVal_168 (+ |main_~#C~0.offset| 4) .cse0)))) (+ (select (select .cse1 |c_main_~#B~0.base|) .cse2) (select (select .cse1 |c_main_~#A~0.base|) .cse3))))))) is different from false [2022-03-18 21:38:59,691 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_166 Int) (|main_~#B~0.offset| Int) (|main_~#C~0.offset| Int) (v_ArrVal_168 (Array Int Int))) (let ((.cse2 (+ |main_~#B~0.offset| 4)) (.cse3 (+ 4 |c_main_~#A~0.offset|)) (.cse4 (store |c_#memory_int| |c_main_~#B~0.base| (store (select |c_#memory_int| |c_main_~#B~0.base|) (+ (* (mod c_main_~i~0 4294967296) 4) |main_~#B~0.offset|) v_ArrVal_166)))) (let ((.cse0 (let ((.cse5 (store .cse4 |c_main_~#C~0.base| v_ArrVal_168))) (+ (select (select .cse5 |c_main_~#B~0.base|) .cse2) (select (select .cse5 |c_main_~#A~0.base|) .cse3))))) (= .cse0 (let ((.cse1 (store .cse4 |c_main_~#C~0.base| (store v_ArrVal_168 (+ |main_~#C~0.offset| 4) .cse0)))) (+ (select (select .cse1 |c_main_~#B~0.base|) .cse2) (select (select .cse1 |c_main_~#A~0.base|) .cse3))))))) is different from false [2022-03-18 21:38:59,702 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_166 Int) (|main_~#B~0.offset| Int) (|main_~#C~0.offset| Int) (v_ArrVal_168 (Array Int Int))) (let ((.cse1 (+ 4 |c_main_~#A~0.offset|)) (.cse2 (+ |main_~#B~0.offset| 4)) (.cse3 (store |c_#memory_int| |c_main_~#B~0.base| (store (select |c_#memory_int| |c_main_~#B~0.base|) (+ (* (mod (+ c_main_~i~0 1) 4294967296) 4) |main_~#B~0.offset|) v_ArrVal_166)))) (let ((.cse4 (let ((.cse5 (store .cse3 |c_main_~#C~0.base| v_ArrVal_168))) (+ (select (select .cse5 |c_main_~#A~0.base|) .cse1) (select (select .cse5 |c_main_~#B~0.base|) .cse2))))) (= (let ((.cse0 (store .cse3 |c_main_~#C~0.base| (store v_ArrVal_168 (+ |main_~#C~0.offset| 4) .cse4)))) (+ (select (select .cse0 |c_main_~#A~0.base|) .cse1) (select (select .cse0 |c_main_~#B~0.base|) .cse2))) .cse4)))) is different from false [2022-03-18 21:38:59,721 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:59,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 132 [2022-03-18 21:38:59,730 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (|main_~#B~0.offset| Int) (|main_~#C~0.offset| Int) (v_ArrVal_168 (Array Int Int))) (let ((.cse1 (+ 4 |c_main_~#A~0.offset|)) (.cse2 (+ |main_~#B~0.offset| 4)) (.cse3 (store |c_#memory_int| |c_main_~#B~0.base| v_arrayElimArr_1))) (let ((.cse4 (let ((.cse5 (store .cse3 |c_main_~#C~0.base| v_ArrVal_168))) (+ (select (select .cse5 |c_main_~#A~0.base|) .cse1) (select (select .cse5 |c_main_~#B~0.base|) .cse2))))) (= (let ((.cse0 (store .cse3 |c_main_~#C~0.base| (store v_ArrVal_168 (+ |main_~#C~0.offset| 4) .cse4)))) (+ (select (select .cse0 |c_main_~#A~0.base|) .cse1) (select (select .cse0 |c_main_~#B~0.base|) .cse2))) .cse4)))) is different from false [2022-03-18 21:38:59,765 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:59,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 132 [2022-03-18 21:38:59,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3106 treesize of output 2830 [2022-03-18 21:38:59,821 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:59,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2606 treesize of output 2202 [2022-03-18 21:38:59,856 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 21:38:59,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4130 treesize of output 3038