/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/mod3.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:34:29,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:34:29,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:34:29,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:34:29,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:34:29,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:34:29,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:34:29,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:34:29,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:34:29,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:34:29,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:34:29,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:34:29,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:34:29,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:34:29,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:34:29,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:34:29,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:34:29,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:34:29,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:34:29,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:34:29,241 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:34:29,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:34:29,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:34:29,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:34:29,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:34:29,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:34:29,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:34:29,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:34:29,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:34:29,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:34:29,291 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:34:29,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:34:29,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:34:29,292 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:34:29,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:34:29,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:34:29,292 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:34:29,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:34:29,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:34:29,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:34:29,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:34:29,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:34:29,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:34:29,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:34:29,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:34:29,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:34:29,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:34:29,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:34:29,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:34:29,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:34:29,294 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:34:29,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:34:29,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:34:29,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:34:29,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:34:29,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:34:29,503 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:34:29,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2022-03-20 08:34:29,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d02e3c11/5a59d8d00e1248359b10fcb0190f6a0a/FLAG27eb46864 [2022-03-20 08:34:29,892 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:34:29,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2022-03-20 08:34:29,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d02e3c11/5a59d8d00e1248359b10fcb0190f6a0a/FLAG27eb46864 [2022-03-20 08:34:30,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d02e3c11/5a59d8d00e1248359b10fcb0190f6a0a [2022-03-20 08:34:30,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:34:30,332 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:34:30,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:34:30,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:34:30,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:34:30,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45488e92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30, skipping insertion in model container [2022-03-20 08:34:30,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:34:30,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:34:30,514 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/mod3.c.v+cfa-reducer.c[1250,1263] [2022-03-20 08:34:30,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:34:30,520 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:34:30,530 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/mod3.c.v+cfa-reducer.c[1250,1263] [2022-03-20 08:34:30,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:34:30,538 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:34:30,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30 WrapperNode [2022-03-20 08:34:30,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:34:30,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:34:30,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:34:30,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:34:30,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:34:30,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:34:30,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:34:30,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:34:30,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (1/1) ... [2022-03-20 08:34:30,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:34:30,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:34:30,602 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) [2022-03-20 08:34:30,631 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 [2022-03-20 08:34:30,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:34:30,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:34:30,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:34:30,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:34:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:34:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:34:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:34:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:34:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:34:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:34:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:34:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:34:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:34:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:34:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:34:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:34:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:34:30,687 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:34:30,688 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:34:35,122 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:34:35,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:34:35,126 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-20 08:34:35,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:34:35 BoogieIcfgContainer [2022-03-20 08:34:35,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:34:35,129 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:34:35,129 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:34:35,130 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:34:35,132 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:34:35" (1/1) ... [2022-03-20 08:34:35,133 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:34:35,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:34:35 BasicIcfg [2022-03-20 08:34:35,143 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:34:35,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:34:35,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:34:35,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:34:35,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:34:30" (1/4) ... [2022-03-20 08:34:35,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d761a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:34:35, skipping insertion in model container [2022-03-20 08:34:35,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:34:30" (2/4) ... [2022-03-20 08:34:35,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d761a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:34:35, skipping insertion in model container [2022-03-20 08:34:35,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:34:35" (3/4) ... [2022-03-20 08:34:35,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d761a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:34:35, skipping insertion in model container [2022-03-20 08:34:35,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:34:35" (4/4) ... [2022-03-20 08:34:35,149 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c.v+cfa-reducer.cqvasr [2022-03-20 08:34:35,153 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:34:35,153 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:34:35,186 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:34:35,191 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 [2022-03-20 08:34:35,191 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:34:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-03-20 08:34:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:34:35,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:34:35,208 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:34:35,208 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:34:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:34:35,212 INFO L85 PathProgramCache]: Analyzing trace with hash -963747291, now seen corresponding path program 1 times [2022-03-20 08:34:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:34:35,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141915241] [2022-03-20 08:34:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:34:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:34:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:34:35,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:34:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:34:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:34:35,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:34:35,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141915241] [2022-03-20 08:34:35,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141915241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:34:35,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:34:35,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:34:35,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218355520] [2022-03-20 08:34:35,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:34:35,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:34:35,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:34:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:34:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:34:35,449 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-03-20 08:34:37,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 08:34:39,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 08:34:41,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 08:34:44,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 08:34:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:34:44,236 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-03-20 08:34:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:34:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2022-03-20 08:34:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:34:44,246 INFO L225 Difference]: With dead ends: 36 [2022-03-20 08:34:44,246 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 08:34:44,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:34:44,250 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:34:44,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2022-03-20 08:34:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 08:34:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-03-20 08:34:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-03-20 08:34:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-03-20 08:34:44,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-03-20 08:34:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:34:44,278 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-03-20 08:34:44,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-03-20 08:34:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-03-20 08:34:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 08:34:44,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:34:44,280 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:34:44,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:34:44,281 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:34:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:34:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash -92546851, now seen corresponding path program 1 times [2022-03-20 08:34:44,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:34:44,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297829927] [2022-03-20 08:34:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:34:44,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:34:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:34:44,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:34:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:34:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:34:44,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:34:44,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297829927] [2022-03-20 08:34:44,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297829927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:34:44,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104113891] [2022-03-20 08:34:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:34:44,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:34:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:34:44,618 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) [2022-03-20 08:34:44,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process