/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/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:10:32,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:10:32,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:10:32,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 12:10:32,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 12:10:32,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 12:10:32,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 12:10:32,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 12:10:32,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 12:10:32,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 12:10:32,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 12:10:32,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 12:10:32,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 12:10:32,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 12:10:32,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 12:10:32,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 12:10:32,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 12:10:32,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 12:10:32,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 12:10:32,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 12:10:32,291 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 12:10:32,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 12:10:32,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 12:10:32,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 12:10:32,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 12:10:32,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 12:10:32,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:10:32,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:10:32,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:10:32,304 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 12:10:32,318 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:10:32,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:10:32,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 12:10:32,319 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 12:10:32,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 12:10:32,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:10:32,320 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:10:32,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:10:32,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:10:32,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 12:10:32,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 12:10:32,322 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 12:10:32,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:10:32,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:10:32,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:10:32,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:10:32,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:10:32,473 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:10:32,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2022-03-20 12:10:32,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487353a4b/f5a4a7c1f5bf477386281be53a616f3b/FLAGa549759a2 [2022-03-20 12:10:32,820 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:10:32,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2022-03-20 12:10:32,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487353a4b/f5a4a7c1f5bf477386281be53a616f3b/FLAGa549759a2 [2022-03-20 12:10:33,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487353a4b/f5a4a7c1f5bf477386281be53a616f3b [2022-03-20 12:10:33,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:10:33,253 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 12:10:33,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:10:33,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:10:33,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:10:33,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33eb9875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33, skipping insertion in model container [2022-03-20 12:10:33,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:10:33,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:10:33,447 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c[2881,2894] [2022-03-20 12:10:33,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:10:33,456 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:10:33,496 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c[2881,2894] [2022-03-20 12:10:33,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:10:33,505 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:10:33,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33 WrapperNode [2022-03-20 12:10:33,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:10:33,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:10:33,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:10:33,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:10:33,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:10:33,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:10:33,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:10:33,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:10:33,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:10:33,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:10:33,556 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 12:10:33,558 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 12:10:33,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:10:33,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:10:33,584 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:10:33,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:10:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:10:33,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:10:33,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:10:33,636 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:10:33,637 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:10:33,794 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:10:33,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:10:33,799 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 12:10:33,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:33 BoogieIcfgContainer [2022-03-20 12:10:33,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:10:33,800 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 12:10:33,800 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 12:10:33,806 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 12:10:33,808 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:33" (1/1) ... [2022-03-20 12:10:33,809 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 12:10:33,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:10:33 BasicIcfg [2022-03-20 12:10:33,829 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 12:10:33,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:10:33,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:10:33,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:10:33,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:10:33" (1/4) ... [2022-03-20 12:10:33,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6411775e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:10:33, skipping insertion in model container [2022-03-20 12:10:33,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:33" (2/4) ... [2022-03-20 12:10:33,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6411775e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:10:33, skipping insertion in model container [2022-03-20 12:10:33,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:33" (3/4) ... [2022-03-20 12:10:33,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6411775e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:10:33, skipping insertion in model container [2022-03-20 12:10:33,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:10:33" (4/4) ... [2022-03-20 12:10:33,863 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.cqvasr [2022-03-20 12:10:33,867 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:10:33,867 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:10:33,909 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:10:33,913 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 12:10:33,914 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:10:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 31 states have internal predecessors, (55), 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 12:10:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 12:10:33,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:33,929 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:33,930 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:33,933 INFO L85 PathProgramCache]: Analyzing trace with hash -172104918, now seen corresponding path program 1 times [2022-03-20 12:10:33,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:33,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12056206] [2022-03-20 12:10:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:33,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,138 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 12:10:34,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12056206] [2022-03-20 12:10:34,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12056206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249098244] [2022-03-20 12:10:34,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,168 INFO L87 Difference]: Start difference. First operand has 36 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 31 states have internal predecessors, (55), 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 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 12:10:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:34,293 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2022-03-20 12:10:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:34,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2022-03-20 12:10:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:34,302 INFO L225 Difference]: With dead ends: 70 [2022-03-20 12:10:34,302 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 12:10:34,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:34,307 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 123 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:34,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 71 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:10:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 12:10:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2022-03-20 12:10:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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 12:10:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 66 transitions. [2022-03-20 12:10:34,331 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 66 transitions. Word has length 18 [2022-03-20 12:10:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:34,331 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 66 transitions. [2022-03-20 12:10:34,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 12:10:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 66 transitions. [2022-03-20 12:10:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 12:10:34,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:34,332 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:34,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:10:34,333 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash -368618423, now seen corresponding path program 1 times [2022-03-20 12:10:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:34,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489063101] [2022-03-20 12:10:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,373 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 12:10:34,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489063101] [2022-03-20 12:10:34,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489063101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965016180] [2022-03-20 12:10:34,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,376 INFO L87 Difference]: Start difference. First operand 39 states and 66 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 12:10:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:34,429 INFO L93 Difference]: Finished difference Result 88 states and 153 transitions. [2022-03-20 12:10:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2022-03-20 12:10:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:34,431 INFO L225 Difference]: With dead ends: 88 [2022-03-20 12:10:34,431 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 12:10:34,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:34,432 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 103 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:34,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 71 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 12:10:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-03-20 12:10:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 49 states have internal predecessors, (87), 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 12:10:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 90 transitions. [2022-03-20 12:10:34,438 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 90 transitions. Word has length 18 [2022-03-20 12:10:34,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:34,439 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 90 transitions. [2022-03-20 12:10:34,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 12:10:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 90 transitions. [2022-03-20 12:10:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 12:10:34,439 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:34,440 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:34,440 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:10:34,440 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1040253202, now seen corresponding path program 1 times [2022-03-20 12:10:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:34,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350304084] [2022-03-20 12:10:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:34,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,477 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 12:10:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350304084] [2022-03-20 12:10:34,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350304084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434948679] [2022-03-20 12:10:34,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,479 INFO L87 Difference]: Start difference. First operand 53 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 12:10:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:34,529 INFO L93 Difference]: Finished difference Result 82 states and 136 transitions. [2022-03-20 12:10:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2022-03-20 12:10:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:34,530 INFO L225 Difference]: With dead ends: 82 [2022-03-20 12:10:34,531 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 12:10:34,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:34,532 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 92 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:34,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 83 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 12:10:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-03-20 12:10:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 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 12:10:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 92 transitions. [2022-03-20 12:10:34,537 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 92 transitions. Word has length 19 [2022-03-20 12:10:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:34,538 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 92 transitions. [2022-03-20 12:10:34,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 12:10:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 92 transitions. [2022-03-20 12:10:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 12:10:34,538 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:34,539 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:34,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 12:10:34,539 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1457762735, now seen corresponding path program 1 times [2022-03-20 12:10:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:34,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837310306] [2022-03-20 12:10:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:34,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,571 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 12:10:34,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837310306] [2022-03-20 12:10:34,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837310306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430094737] [2022-03-20 12:10:34,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,573 INFO L87 Difference]: Start difference. First operand 56 states and 92 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 12:10:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:34,622 INFO L93 Difference]: Finished difference Result 101 states and 169 transitions. [2022-03-20 12:10:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2022-03-20 12:10:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:34,623 INFO L225 Difference]: With dead ends: 101 [2022-03-20 12:10:34,623 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 12:10:34,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:34,624 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 110 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:34,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 59 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 12:10:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2022-03-20 12:10:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.710144927536232) internal successors, (118), 69 states have internal predecessors, (118), 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 12:10:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2022-03-20 12:10:34,630 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 19 [2022-03-20 12:10:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:34,630 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2022-03-20 12:10:34,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 12:10:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2022-03-20 12:10:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 12:10:34,631 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:34,631 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:34,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 12:10:34,631 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1261249230, now seen corresponding path program 1 times [2022-03-20 12:10:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:34,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384065758] [2022-03-20 12:10:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:34,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,667 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 12:10:34,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384065758] [2022-03-20 12:10:34,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384065758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531050847] [2022-03-20 12:10:34,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,668 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 12:10:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:34,714 INFO L93 Difference]: Finished difference Result 165 states and 279 transitions. [2022-03-20 12:10:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2022-03-20 12:10:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:34,715 INFO L225 Difference]: With dead ends: 165 [2022-03-20 12:10:34,715 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 12:10:34,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:34,716 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 97 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:34,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 73 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 12:10:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-03-20 12:10:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 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 12:10:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 163 transitions. [2022-03-20 12:10:34,722 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 163 transitions. Word has length 19 [2022-03-20 12:10:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:34,722 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 163 transitions. [2022-03-20 12:10:34,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 12:10:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 163 transitions. [2022-03-20 12:10:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:10:34,723 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:34,723 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:34,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 12:10:34,723 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2053963387, now seen corresponding path program 1 times [2022-03-20 12:10:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:34,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811225323] [2022-03-20 12:10:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:34,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,751 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 12:10:34,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811225323] [2022-03-20 12:10:34,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811225323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748354630] [2022-03-20 12:10:34,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,752 INFO L87 Difference]: Start difference. First operand 99 states and 163 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 12:10:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:34,795 INFO L93 Difference]: Finished difference Result 148 states and 242 transitions. [2022-03-20 12:10:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2022-03-20 12:10:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:34,796 INFO L225 Difference]: With dead ends: 148 [2022-03-20 12:10:34,796 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 12:10:34,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:34,797 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 91 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:34,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 80 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 12:10:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-03-20 12:10:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 97 states have internal predecessors, (160), 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 12:10:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 163 transitions. [2022-03-20 12:10:34,803 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 163 transitions. Word has length 20 [2022-03-20 12:10:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:34,803 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 163 transitions. [2022-03-20 12:10:34,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 12:10:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 163 transitions. [2022-03-20 12:10:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:10:34,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:34,804 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:34,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 12:10:34,804 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash 444052550, now seen corresponding path program 1 times [2022-03-20 12:10:34,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:34,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334146712] [2022-03-20 12:10:34,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:34,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,830 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 12:10:34,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334146712] [2022-03-20 12:10:34,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334146712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858228329] [2022-03-20 12:10:34,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,832 INFO L87 Difference]: Start difference. First operand 101 states and 163 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 12:10:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:34,875 INFO L93 Difference]: Finished difference Result 181 states and 297 transitions. [2022-03-20 12:10:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2022-03-20 12:10:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:34,876 INFO L225 Difference]: With dead ends: 181 [2022-03-20 12:10:34,876 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 12:10:34,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:34,877 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 103 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:34,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 58 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 12:10:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2022-03-20 12:10:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 133 states have internal predecessors, (216), 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 12:10:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 219 transitions. [2022-03-20 12:10:34,883 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 219 transitions. Word has length 20 [2022-03-20 12:10:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:34,883 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 219 transitions. [2022-03-20 12:10:34,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 12:10:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 219 transitions. [2022-03-20 12:10:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:10:34,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:34,884 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:34,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 12:10:34,884 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash 247539045, now seen corresponding path program 1 times [2022-03-20 12:10:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:34,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027767370] [2022-03-20 12:10:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,909 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 12:10:34,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027767370] [2022-03-20 12:10:34,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027767370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740757821] [2022-03-20 12:10:34,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,910 INFO L87 Difference]: Start difference. First operand 137 states and 219 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 12:10:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:34,954 INFO L93 Difference]: Finished difference Result 313 states and 505 transitions. [2022-03-20 12:10:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2022-03-20 12:10:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:34,956 INFO L225 Difference]: With dead ends: 313 [2022-03-20 12:10:34,956 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 12:10:34,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:34,957 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 91 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:34,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 75 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 12:10:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-03-20 12:10:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.591160220994475) internal successors, (288), 181 states have internal predecessors, (288), 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 12:10:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 291 transitions. [2022-03-20 12:10:34,963 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 291 transitions. Word has length 20 [2022-03-20 12:10:34,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:34,963 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 291 transitions. [2022-03-20 12:10:34,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 12:10:34,964 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 291 transitions. [2022-03-20 12:10:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:10:34,964 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:34,964 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:34,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 12:10:34,964 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash 880759370, now seen corresponding path program 1 times [2022-03-20 12:10:34,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:34,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357126006] [2022-03-20 12:10:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:34,987 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 12:10:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:34,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357126006] [2022-03-20 12:10:34,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357126006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:34,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:34,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:34,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653849588] [2022-03-20 12:10:34,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:34,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:34,989 INFO L87 Difference]: Start difference. First operand 185 states and 291 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 12:10:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,030 INFO L93 Difference]: Finished difference Result 277 states and 433 transitions. [2022-03-20 12:10:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2022-03-20 12:10:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,032 INFO L225 Difference]: With dead ends: 277 [2022-03-20 12:10:35,032 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 12:10:35,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,032 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 90 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 77 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 12:10:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2022-03-20 12:10:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.5567567567567568) internal successors, (288), 185 states have internal predecessors, (288), 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 12:10:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 291 transitions. [2022-03-20 12:10:35,038 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 291 transitions. Word has length 21 [2022-03-20 12:10:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,038 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 291 transitions. [2022-03-20 12:10:35,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 12:10:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 291 transitions. [2022-03-20 12:10:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:10:35,039 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,039 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 12:10:35,039 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,039 INFO L85 PathProgramCache]: Analyzing trace with hash -916191989, now seen corresponding path program 1 times [2022-03-20 12:10:35,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993335954] [2022-03-20 12:10:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,061 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 12:10:35,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993335954] [2022-03-20 12:10:35,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993335954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208990139] [2022-03-20 12:10:35,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,063 INFO L87 Difference]: Start difference. First operand 189 states and 291 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 12:10:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,106 INFO L93 Difference]: Finished difference Result 333 states and 521 transitions. [2022-03-20 12:10:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2022-03-20 12:10:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,107 INFO L225 Difference]: With dead ends: 333 [2022-03-20 12:10:35,107 INFO L226 Difference]: Without dead ends: 331 [2022-03-20 12:10:35,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,108 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 96 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 57 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-20 12:10:35,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 265. [2022-03-20 12:10:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 261 states have (on average 1.5172413793103448) internal successors, (396), 261 states have internal predecessors, (396), 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 12:10:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 399 transitions. [2022-03-20 12:10:35,113 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 399 transitions. Word has length 21 [2022-03-20 12:10:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,114 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 399 transitions. [2022-03-20 12:10:35,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 12:10:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 399 transitions. [2022-03-20 12:10:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:10:35,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,115 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 12:10:35,115 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1112705494, now seen corresponding path program 1 times [2022-03-20 12:10:35,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700952065] [2022-03-20 12:10:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,136 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 12:10:35,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700952065] [2022-03-20 12:10:35,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700952065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937946205] [2022-03-20 12:10:35,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,137 INFO L87 Difference]: Start difference. First operand 265 states and 399 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 12:10:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,184 INFO L93 Difference]: Finished difference Result 605 states and 913 transitions. [2022-03-20 12:10:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2022-03-20 12:10:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,185 INFO L225 Difference]: With dead ends: 605 [2022-03-20 12:10:35,185 INFO L226 Difference]: Without dead ends: 355 [2022-03-20 12:10:35,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,186 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 85 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 77 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-20 12:10:35,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2022-03-20 12:10:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 349 states have (on average 1.478510028653295) internal successors, (516), 349 states have internal predecessors, (516), 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 12:10:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 519 transitions. [2022-03-20 12:10:35,195 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 519 transitions. Word has length 21 [2022-03-20 12:10:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,195 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 519 transitions. [2022-03-20 12:10:35,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 12:10:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 519 transitions. [2022-03-20 12:10:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:10:35,196 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,196 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 12:10:35,196 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1662851745, now seen corresponding path program 1 times [2022-03-20 12:10:35,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125222618] [2022-03-20 12:10:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,218 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 12:10:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125222618] [2022-03-20 12:10:35,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125222618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047534308] [2022-03-20 12:10:35,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,220 INFO L87 Difference]: Start difference. First operand 353 states and 519 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 12:10:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,263 INFO L93 Difference]: Finished difference Result 529 states and 773 transitions. [2022-03-20 12:10:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2022-03-20 12:10:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,264 INFO L225 Difference]: With dead ends: 529 [2022-03-20 12:10:35,264 INFO L226 Difference]: Without dead ends: 363 [2022-03-20 12:10:35,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,265 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 89 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 74 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-20 12:10:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2022-03-20 12:10:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.4453781512605042) internal successors, (516), 357 states have internal predecessors, (516), 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 12:10:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 519 transitions. [2022-03-20 12:10:35,274 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 519 transitions. Word has length 22 [2022-03-20 12:10:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,274 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 519 transitions. [2022-03-20 12:10:35,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 12:10:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 519 transitions. [2022-03-20 12:10:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:10:35,275 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,275 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 12:10:35,275 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash -134099614, now seen corresponding path program 1 times [2022-03-20 12:10:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084338686] [2022-03-20 12:10:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,296 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 12:10:35,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084338686] [2022-03-20 12:10:35,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084338686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63751587] [2022-03-20 12:10:35,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,298 INFO L87 Difference]: Start difference. First operand 361 states and 519 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 12:10:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,348 INFO L93 Difference]: Finished difference Result 621 states and 905 transitions. [2022-03-20 12:10:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2022-03-20 12:10:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,351 INFO L225 Difference]: With dead ends: 621 [2022-03-20 12:10:35,351 INFO L226 Difference]: Without dead ends: 619 [2022-03-20 12:10:35,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,351 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 89 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 56 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-03-20 12:10:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 521. [2022-03-20 12:10:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.4003868471953578) internal successors, (724), 517 states have internal predecessors, (724), 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 12:10:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 727 transitions. [2022-03-20 12:10:35,363 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 727 transitions. Word has length 22 [2022-03-20 12:10:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,363 INFO L478 AbstractCegarLoop]: Abstraction has 521 states and 727 transitions. [2022-03-20 12:10:35,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 12:10:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 727 transitions. [2022-03-20 12:10:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:10:35,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,364 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 12:10:35,365 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash -330613119, now seen corresponding path program 1 times [2022-03-20 12:10:35,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384611105] [2022-03-20 12:10:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,387 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 12:10:35,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384611105] [2022-03-20 12:10:35,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384611105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588219409] [2022-03-20 12:10:35,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,389 INFO L87 Difference]: Start difference. First operand 521 states and 727 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 12:10:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,435 INFO L93 Difference]: Finished difference Result 1181 states and 1641 transitions. [2022-03-20 12:10:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2022-03-20 12:10:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,437 INFO L225 Difference]: With dead ends: 1181 [2022-03-20 12:10:35,437 INFO L226 Difference]: Without dead ends: 683 [2022-03-20 12:10:35,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,438 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 79 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 79 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-20 12:10:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 681. [2022-03-20 12:10:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 677 states have (on average 1.3530280649926145) internal successors, (916), 677 states have internal predecessors, (916), 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 12:10:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 919 transitions. [2022-03-20 12:10:35,461 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 919 transitions. Word has length 22 [2022-03-20 12:10:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,461 INFO L478 AbstractCegarLoop]: Abstraction has 681 states and 919 transitions. [2022-03-20 12:10:35,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 12:10:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 919 transitions. [2022-03-20 12:10:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:10:35,462 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,462 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 12:10:35,462 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 137911718, now seen corresponding path program 1 times [2022-03-20 12:10:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574631787] [2022-03-20 12:10:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,481 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 12:10:35,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574631787] [2022-03-20 12:10:35,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574631787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826266642] [2022-03-20 12:10:35,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,482 INFO L87 Difference]: Start difference. First operand 681 states and 919 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 12:10:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,525 INFO L93 Difference]: Finished difference Result 1021 states and 1369 transitions. [2022-03-20 12:10:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-03-20 12:10:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,527 INFO L225 Difference]: With dead ends: 1021 [2022-03-20 12:10:35,527 INFO L226 Difference]: Without dead ends: 699 [2022-03-20 12:10:35,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,527 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 88 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-20 12:10:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-03-20 12:10:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.3217893217893217) internal successors, (916), 693 states have internal predecessors, (916), 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 12:10:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 919 transitions. [2022-03-20 12:10:35,540 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 919 transitions. Word has length 23 [2022-03-20 12:10:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,540 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 919 transitions. [2022-03-20 12:10:35,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 12:10:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 919 transitions. [2022-03-20 12:10:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:10:35,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,541 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 12:10:35,541 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1659039641, now seen corresponding path program 1 times [2022-03-20 12:10:35,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365959895] [2022-03-20 12:10:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,559 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 12:10:35,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365959895] [2022-03-20 12:10:35,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365959895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627274008] [2022-03-20 12:10:35,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,560 INFO L87 Difference]: Start difference. First operand 697 states and 919 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 12:10:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,608 INFO L93 Difference]: Finished difference Result 1981 states and 2553 transitions. [2022-03-20 12:10:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-03-20 12:10:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,611 INFO L225 Difference]: With dead ends: 1981 [2022-03-20 12:10:35,611 INFO L226 Difference]: Without dead ends: 1323 [2022-03-20 12:10:35,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,613 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 92 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 65 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-03-20 12:10:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1321. [2022-03-20 12:10:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1317 states have (on average 1.2422171602126044) internal successors, (1636), 1317 states have internal predecessors, (1636), 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 12:10:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1639 transitions. [2022-03-20 12:10:35,634 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1639 transitions. Word has length 23 [2022-03-20 12:10:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,634 INFO L478 AbstractCegarLoop]: Abstraction has 1321 states and 1639 transitions. [2022-03-20 12:10:35,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 12:10:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1639 transitions. [2022-03-20 12:10:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:10:35,635 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,635 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 12:10:35,635 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1462526136, now seen corresponding path program 1 times [2022-03-20 12:10:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337563033] [2022-03-20 12:10:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,653 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 12:10:35,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337563033] [2022-03-20 12:10:35,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337563033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762676803] [2022-03-20 12:10:35,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,654 INFO L87 Difference]: Start difference. First operand 1321 states and 1639 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 12:10:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,703 INFO L93 Difference]: Finished difference Result 1453 states and 1833 transitions. [2022-03-20 12:10:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-03-20 12:10:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,706 INFO L225 Difference]: With dead ends: 1453 [2022-03-20 12:10:35,706 INFO L226 Difference]: Without dead ends: 1451 [2022-03-20 12:10:35,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,707 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 57 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 76 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-03-20 12:10:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1321. [2022-03-20 12:10:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1317 states have (on average 1.2179195140470767) internal successors, (1604), 1317 states have internal predecessors, (1604), 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 12:10:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1607 transitions. [2022-03-20 12:10:35,729 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1607 transitions. Word has length 23 [2022-03-20 12:10:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,729 INFO L478 AbstractCegarLoop]: Abstraction has 1321 states and 1607 transitions. [2022-03-20 12:10:35,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 12:10:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1607 transitions. [2022-03-20 12:10:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:10:35,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,730 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 12:10:35,731 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,731 INFO L85 PathProgramCache]: Analyzing trace with hash 109411261, now seen corresponding path program 1 times [2022-03-20 12:10:35,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077724806] [2022-03-20 12:10:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,749 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 12:10:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077724806] [2022-03-20 12:10:35,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077724806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706137468] [2022-03-20 12:10:35,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,750 INFO L87 Difference]: Start difference. First operand 1321 states and 1607 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 12:10:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,806 INFO L93 Difference]: Finished difference Result 2155 states and 2600 transitions. [2022-03-20 12:10:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-03-20 12:10:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,810 INFO L225 Difference]: With dead ends: 2155 [2022-03-20 12:10:35,811 INFO L226 Difference]: Without dead ends: 2153 [2022-03-20 12:10:35,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,811 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 74 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 53 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-03-20 12:10:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 2025. [2022-03-20 12:10:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2021 states have (on average 1.1895101434933202) internal successors, (2404), 2021 states have internal predecessors, (2404), 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 12:10:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 2407 transitions. [2022-03-20 12:10:35,842 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 2407 transitions. Word has length 24 [2022-03-20 12:10:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,842 INFO L478 AbstractCegarLoop]: Abstraction has 2025 states and 2407 transitions. [2022-03-20 12:10:35,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 12:10:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 2407 transitions. [2022-03-20 12:10:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:10:35,844 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:35,844 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:35,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 12:10:35,844 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:35,845 INFO L85 PathProgramCache]: Analyzing trace with hash -87102244, now seen corresponding path program 1 times [2022-03-20 12:10:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:35,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138121937] [2022-03-20 12:10:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:35,868 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 12:10:35,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:35,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138121937] [2022-03-20 12:10:35,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138121937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:35,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:35,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:35,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437496693] [2022-03-20 12:10:35,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:35,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:35,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:35,870 INFO L87 Difference]: Start difference. First operand 2025 states and 2407 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 12:10:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:35,950 INFO L93 Difference]: Finished difference Result 4521 states and 5287 transitions. [2022-03-20 12:10:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-03-20 12:10:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:35,951 INFO L225 Difference]: With dead ends: 4521 [2022-03-20 12:10:35,951 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 12:10:35,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:10:35,957 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:35,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 82 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 12:10:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 12:10:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 12:10:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 12:10:35,959 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-03-20 12:10:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:35,959 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 12:10:35,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 12:10:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 12:10:35,959 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 12:10:35,961 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 12:10:35,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 12:10:35,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 12:10:38,085 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 12:10:38,086 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 6 123) the Hoare annotation is: true [2022-03-20 12:10:38,086 INFO L885 garLoopResultBuilder]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2022-03-20 12:10:38,086 INFO L885 garLoopResultBuilder]: At program point L119(lines 7 123) the Hoare annotation is: true [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point L34(lines 34 36) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 6 123) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point L53(lines 53 55) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 6 123) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,086 INFO L882 garLoopResultBuilder]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L84(line 84) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L878 garLoopResultBuilder]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L89(line 89) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 121) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L94(line 94) no Hoare annotation was computed. [2022-03-20 12:10:38,087 INFO L882 garLoopResultBuilder]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,088 INFO L882 garLoopResultBuilder]: For program point L99(line 99) no Hoare annotation was computed. [2022-03-20 12:10:38,088 INFO L882 garLoopResultBuilder]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,088 INFO L882 garLoopResultBuilder]: For program point L104(line 104) no Hoare annotation was computed. [2022-03-20 12:10:38,088 INFO L882 garLoopResultBuilder]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,088 INFO L882 garLoopResultBuilder]: For program point L109(line 109) no Hoare annotation was computed. [2022-03-20 12:10:38,088 INFO L882 garLoopResultBuilder]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2022-03-20 12:10:38,088 INFO L882 garLoopResultBuilder]: For program point L114(line 114) no Hoare annotation was computed. [2022-03-20 12:10:38,090 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:38,091 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 12:10:38,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:10:38 BasicIcfg [2022-03-20 12:10:38,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 12:10:38,097 INFO L158 Benchmark]: Toolchain (without parser) took 4843.66ms. Allocated memory was 156.2MB in the beginning and 503.3MB in the end (delta: 347.1MB). Free memory was 130.7MB in the beginning and 215.3MB in the end (delta: -84.6MB). Peak memory consumption was 303.3MB. Max. memory is 8.0GB. [2022-03-20 12:10:38,097 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 156.2MB. Free memory is still 114.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 12:10:38,097 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.29ms. Allocated memory was 156.2MB in the beginning and 290.5MB in the end (delta: 134.2MB). Free memory was 130.5MB in the beginning and 263.6MB in the end (delta: -133.1MB). Peak memory consumption was 8.0MB. Max. memory is 8.0GB. [2022-03-20 12:10:38,097 INFO L158 Benchmark]: Boogie Preprocessor took 22.17ms. Allocated memory is still 290.5MB. Free memory was 263.6MB in the beginning and 262.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:10:38,098 INFO L158 Benchmark]: RCFGBuilder took 271.33ms. Allocated memory is still 290.5MB. Free memory was 262.1MB in the beginning and 250.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 12:10:38,098 INFO L158 Benchmark]: IcfgTransformer took 29.12ms. Allocated memory is still 290.5MB. Free memory was 250.5MB in the beginning and 249.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 12:10:38,098 INFO L158 Benchmark]: TraceAbstraction took 4253.07ms. Allocated memory was 290.5MB in the beginning and 503.3MB in the end (delta: 212.9MB). Free memory was 248.4MB in the beginning and 215.3MB in the end (delta: 33.2MB). Peak memory consumption was 288.0MB. Max. memory is 8.0GB. [2022-03-20 12:10:38,099 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 156.2MB. Free memory is still 114.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 251.29ms. Allocated memory was 156.2MB in the beginning and 290.5MB in the end (delta: 134.2MB). Free memory was 130.5MB in the beginning and 263.6MB in the end (delta: -133.1MB). Peak memory consumption was 8.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.17ms. Allocated memory is still 290.5MB. Free memory was 263.6MB in the beginning and 262.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 271.33ms. Allocated memory is still 290.5MB. Free memory was 262.1MB in the beginning and 250.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 29.12ms. Allocated memory is still 290.5MB. Free memory was 250.5MB in the beginning and 249.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 4253.07ms. Allocated memory was 290.5MB in the beginning and 503.3MB in the end (delta: 212.9MB). Free memory was 248.4MB in the beginning and 215.3MB in the end (delta: 33.2MB). Peak memory consumption was 288.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 121]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1713 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1713 mSDsluCounter, 1337 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 135 mSDsCounter, 45 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 836 IncrementalHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 45 mSolverCounterUnsat, 1202 mSDtfsCounter, 836 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2025occurred in iteration=18, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 13 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 2.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 399 NumberOfCodeBlocks, 399 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 380 ConstructedInterpolants, 0 QuantifiedInterpolants, 809 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2022-03-20 12:10:38,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...