/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/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:32:20,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:32:20,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:32:20,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 05:32:20,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 05:32:20,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 05:32:20,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 05:32:20,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 05:32:20,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 05:32:20,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 05:32:20,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 05:32:20,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 05:32:20,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:32:20,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:32:20,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:32:20,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:32:20,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:32:20,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:32:20,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:32:20,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:32:20,343 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:32:20,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:32:20,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:32:20,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:32:20,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:32:20,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:32:20,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:32:20,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:32:20,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:32:20,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:32:20,374 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:32:20,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:32:20,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:32:20,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:32:20,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:32:20,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:32:20,376 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:32:20,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:32:20,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:32:20,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:32:20,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:32:20,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:32:20,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:32:20,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:32:20,378 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:32:20,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:32:20,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:32:20,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:32:20,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:32:20,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:32:20,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:32:20,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:32:20,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:32:20,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:32:20,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:32:20,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:32:20,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:32:20,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:32:20,380 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:32:20,380 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:32:20,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:32:20,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:32:20,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:32:20,578 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:32:20,578 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:32:20,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-04-05 05:32:20,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29c9cce0/2ec6cae5b99e497eaefd6fb49a7461b2/FLAGeef913a70 [2022-04-05 05:32:20,996 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:32:20,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-04-05 05:32:21,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29c9cce0/2ec6cae5b99e497eaefd6fb49a7461b2/FLAGeef913a70 [2022-04-05 05:32:21,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29c9cce0/2ec6cae5b99e497eaefd6fb49a7461b2 [2022-04-05 05:32:21,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:32:21,396 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:32:21,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:32:21,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:32:21,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:32:21,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191df169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21, skipping insertion in model container [2022-04-05 05:32:21,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:32:21,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:32:21,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2022-04-05 05:32:21,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:32:21,600 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:32:21,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2022-04-05 05:32:21,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:32:21,676 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:32:21,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21 WrapperNode [2022-04-05 05:32:21,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:32:21,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:32:21,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:32:21,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:32:21,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:32:21,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:32:21,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:32:21,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:32:21,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (1/1) ... [2022-04-05 05:32:21,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:32:21,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:32:21,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 05:32:21,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 05:32:21,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:32:21,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:32:21,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:32:21,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-04-05 05:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-04-05 05:32:21,882 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:32:21,884 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:32:22,306 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:32:22,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:32:22,310 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-05 05:32:22,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:32:22 BoogieIcfgContainer [2022-04-05 05:32:22,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:32:22,312 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:32:22,312 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:32:22,315 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:32:22,317 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:32:22" (1/1) ... [2022-04-05 05:32:22,318 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:32:22,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:32:22 BasicIcfg [2022-04-05 05:32:22,332 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:32:22,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:32:22,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:32:22,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:32:22,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:32:21" (1/4) ... [2022-04-05 05:32:22,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec0a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:32:22, skipping insertion in model container [2022-04-05 05:32:22,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:32:21" (2/4) ... [2022-04-05 05:32:22,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec0a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:32:22, skipping insertion in model container [2022-04-05 05:32:22,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:32:22" (3/4) ... [2022-04-05 05:32:22,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec0a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:32:22, skipping insertion in model container [2022-04-05 05:32:22,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:32:22" (4/4) ... [2022-04-05 05:32:22,340 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.cqvasr [2022-04-05 05:32:22,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:32:22,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:32:22,376 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:32:22,381 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 05:32:22,382 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:32:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 05:32:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 05:32:22,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:32:22,395 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:32:22,395 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:32:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:32:22,398 INFO L85 PathProgramCache]: Analyzing trace with hash 600195039, now seen corresponding path program 1 times [2022-04-05 05:32:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:32:22,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748810466] [2022-04-05 05:32:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:32:22,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:32:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:32:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:32:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748810466] [2022-04-05 05:32:22,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748810466] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:32:22,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:32:22,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 05:32:22,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621882255] [2022-04-05 05:32:22,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:32:22,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 05:32:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:32:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 05:32:22,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:32:22,701 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:22,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:32:22,795 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-04-05 05:32:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 05:32:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-05 05:32:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:32:22,801 INFO L225 Difference]: With dead ends: 38 [2022-04-05 05:32:22,802 INFO L226 Difference]: Without dead ends: 24 [2022-04-05 05:32:22,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 05:32:22,807 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:32:22,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 55 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:32:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-05 05:32:22,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-04-05 05:32:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-04-05 05:32:22,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-04-05 05:32:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:32:22,841 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-04-05 05:32:22,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-05 05:32:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 05:32:22,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:32:22,843 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:32:22,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:32:22,844 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:32:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:32:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash 600224830, now seen corresponding path program 1 times [2022-04-05 05:32:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:32:22,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795120730] [2022-04-05 05:32:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:32:22,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:32:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:22,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:32:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:22,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:32:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795120730] [2022-04-05 05:32:22,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795120730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:32:22,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:32:22,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 05:32:22,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104416615] [2022-04-05 05:32:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:32:22,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 05:32:22,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:32:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 05:32:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:32:22,962 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:32:23,025 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-05 05:32:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 05:32:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-05 05:32:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:32:23,026 INFO L225 Difference]: With dead ends: 34 [2022-04-05 05:32:23,026 INFO L226 Difference]: Without dead ends: 24 [2022-04-05 05:32:23,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:32:23,032 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:32:23,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:32:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-05 05:32:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-04-05 05:32:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-04-05 05:32:23,038 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-04-05 05:32:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:32:23,038 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-04-05 05:32:23,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-05 05:32:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-05 05:32:23,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:32:23,039 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:32:23,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:32:23,040 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:32:23,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:32:23,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1638883516, now seen corresponding path program 1 times [2022-04-05 05:32:23,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:32:23,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111616154] [2022-04-05 05:32:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:32:23,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:32:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:23,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:32:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:23,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:32:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111616154] [2022-04-05 05:32:23,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111616154] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:32:23,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513751148] [2022-04-05 05:32:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:32:23,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:32:23,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:32:23,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:32:23,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:32:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:23,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 05:32:23,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:32:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:23,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:32:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:23,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513751148] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:32:23,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:32:23,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-05 05:32:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651333725] [2022-04-05 05:32:23,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:32:23,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 05:32:23,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:32:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 05:32:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 05:32:23,583 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:32:23,768 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-04-05 05:32:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 05:32:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 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 19 [2022-04-05 05:32:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:32:23,771 INFO L225 Difference]: With dead ends: 53 [2022-04-05 05:32:23,771 INFO L226 Difference]: Without dead ends: 43 [2022-04-05 05:32:23,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-04-05 05:32:23,772 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:32:23,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 62 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:32:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-05 05:32:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-04-05 05:32:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-04-05 05:32:23,778 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 19 [2022-04-05 05:32:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:32:23,778 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-04-05 05:32:23,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-04-05 05:32:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 05:32:23,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:32:23,779 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:32:23,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:32:23,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:32:23,996 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:32:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:32:23,996 INFO L85 PathProgramCache]: Analyzing trace with hash 989508950, now seen corresponding path program 2 times [2022-04-05 05:32:23,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:32:23,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245978224] [2022-04-05 05:32:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:32:23,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:32:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:24,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:32:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:24,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:32:24,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245978224] [2022-04-05 05:32:24,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245978224] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:32:24,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179551651] [2022-04-05 05:32:24,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:32:24,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:32:24,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:32:24,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:32:24,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:32:24,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:32:24,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:32:24,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 05:32:24,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:32:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:24,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:32:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:24,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179551651] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:32:24,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:32:24,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-05 05:32:24,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751225809] [2022-04-05 05:32:24,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:32:24,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 05:32:24,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:32:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 05:32:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:32:24,600 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:32:25,163 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-04-05 05:32:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 05:32:25,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 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 37 [2022-04-05 05:32:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:32:25,164 INFO L225 Difference]: With dead ends: 89 [2022-04-05 05:32:25,164 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 05:32:25,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-04-05 05:32:25,165 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:32:25,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 135 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:32:25,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 05:32:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-04-05 05:32:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-04-05 05:32:25,188 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 37 [2022-04-05 05:32:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:32:25,188 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-04-05 05:32:25,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:32:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-04-05 05:32:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-05 05:32:25,189 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:32:25,189 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:32:25,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:32:25,390 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-05 05:32:25,390 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:32:25,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:32:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1188421638, now seen corresponding path program 3 times [2022-04-05 05:32:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:32:25,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937591888] [2022-04-05 05:32:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:32:25,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:32:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:25,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:32:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:25,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:32:25,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937591888] [2022-04-05 05:32:25,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937591888] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:32:25,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454183773] [2022-04-05 05:32:25,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:32:25,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:32:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:32:25,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:32:25,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:32:25,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 05:32:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:32:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 05:32:25,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:32:26,064 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 05:32:26,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23