/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_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 13:40:34,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 13:40:34,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 13:40:34,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 13:40:34,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 13:40:34,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 13:40:34,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 13:40:34,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 13:40:34,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 13:40:34,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 13:40:34,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 13:40:34,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 13:40:34,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 13:40:34,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 13:40:34,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 13:40:34,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 13:40:34,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 13:40:34,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 13:40:34,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 13:40:34,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 13:40:34,305 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 13:40:34,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 13:40:34,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 13:40:34,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 13:40:34,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 13:40:34,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 13:40:34,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 13:40:34,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 13:40:34,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 13:40:34,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 13:40:34,354 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 13:40:34,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 13:40:34,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 13:40:34,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 13:40:34,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 13:40:34,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 13:40:34,357 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 13:40:34,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 13:40:34,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 13:40:34,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 13:40:34,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 13:40:34,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 13:40:34,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 13:40:34,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 13:40:34,358 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 13:40:34,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 13:40:34,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 13:40:34,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 13:40:34,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 13:40:34,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:40:34,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 13:40:34,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 13:40:34,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 13:40:34,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 13:40:34,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 13:40:34,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 13:40:34,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 13:40:34,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 13:40:34,361 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 13:40:34,361 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 13:40:34,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 13:40:34,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 13:40:34,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 13:40:34,613 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 13:40:34,613 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 13:40:34,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2022-04-06 13:40:34,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccaca6988/a710ed919b0b46a28a12c1fde364b95e/FLAG0aae37cd2 [2022-04-06 13:40:35,088 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 13:40:35,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c [2022-04-06 13:40:35,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccaca6988/a710ed919b0b46a28a12c1fde364b95e/FLAG0aae37cd2 [2022-04-06 13:40:35,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccaca6988/a710ed919b0b46a28a12c1fde364b95e [2022-04-06 13:40:35,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 13:40:35,124 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 13:40:35,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 13:40:35,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 13:40:35,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 13:40:35,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1107f6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35, skipping insertion in model container [2022-04-06 13:40:35,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 13:40:35,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 13:40:35,323 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_12.c[4591,4604] [2022-04-06 13:40:35,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:40:35,333 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 13:40:35,355 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_12.c[4591,4604] [2022-04-06 13:40:35,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:40:35,367 INFO L208 MainTranslator]: Completed translation [2022-04-06 13:40:35,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35 WrapperNode [2022-04-06 13:40:35,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 13:40:35,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 13:40:35,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 13:40:35,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 13:40:35,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 13:40:35,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 13:40:35,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 13:40:35,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 13:40:35,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:40:35,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:40:35,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 13:40:35,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 13:40:35,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 13:40:35,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 13:40:35,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 13:40:35,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 13:40:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 13:40:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 13:40:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 13:40:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 13:40:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 13:40:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 13:40:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 13:40:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 13:40:35,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 13:40:35,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 13:40:35,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 13:40:35,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 13:40:35,527 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 13:40:35,528 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 13:40:35,678 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 13:40:35,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 13:40:35,685 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 13:40:35,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:40:35 BoogieIcfgContainer [2022-04-06 13:40:35,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 13:40:35,687 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 13:40:35,687 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 13:40:35,688 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 13:40:35,691 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:40:35" (1/1) ... [2022-04-06 13:40:35,693 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 13:40:35,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:40:35 BasicIcfg [2022-04-06 13:40:35,713 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 13:40:35,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 13:40:35,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 13:40:35,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 13:40:35,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:40:35" (1/4) ... [2022-04-06 13:40:35,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a59b8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:40:35, skipping insertion in model container [2022-04-06 13:40:35,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:35" (2/4) ... [2022-04-06 13:40:35,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a59b8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:40:35, skipping insertion in model container [2022-04-06 13:40:35,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:40:35" (3/4) ... [2022-04-06 13:40:35,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a59b8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:40:35, skipping insertion in model container [2022-04-06 13:40:35,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:40:35" (4/4) ... [2022-04-06 13:40:35,720 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.cqvasr [2022-04-06 13:40:35,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 13:40:35,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 13:40:35,763 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 13:40:35,769 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 13:40:35,769 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 13:40:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 13:40:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 13:40:35,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:35,809 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] [2022-04-06 13:40:35,810 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1823990193, now seen corresponding path program 1 times [2022-04-06 13:40:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:35,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281284287] [2022-04-06 13:40:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:35,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:36,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:36,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281284287] [2022-04-06 13:40:36,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281284287] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:36,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:36,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:36,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207285495] [2022-04-06 13:40:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:36,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:36,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:36,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:36,131 INFO L87 Difference]: Start difference. First operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 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 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) [2022-04-06 13:40:36,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:36,300 INFO L93 Difference]: Finished difference Result 100 states and 175 transitions. [2022-04-06 13:40:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:36,302 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 [2022-04-06 13:40:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:36,311 INFO L225 Difference]: With dead ends: 100 [2022-04-06 13:40:36,311 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 13:40:36,314 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 [2022-04-06 13:40:36,317 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 208 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:36,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 101 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 13:40:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2022-04-06 13:40:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2022-04-06 13:40:36,356 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 23 [2022-04-06 13:40:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:36,356 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2022-04-06 13:40:36,356 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) [2022-04-06 13:40:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2022-04-06 13:40:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 13:40:36,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:36,358 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] [2022-04-06 13:40:36,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 13:40:36,358 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:36,359 INFO L85 PathProgramCache]: Analyzing trace with hash -316438384, now seen corresponding path program 1 times [2022-04-06 13:40:36,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:36,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062209720] [2022-04-06 13:40:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:36,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:36,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:36,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062209720] [2022-04-06 13:40:36,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062209720] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:36,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:36,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417823542] [2022-04-06 13:40:36,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:36,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:36,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:36,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:36,444 INFO L87 Difference]: Start difference. First operand 59 states and 106 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) [2022-04-06 13:40:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:36,569 INFO L93 Difference]: Finished difference Result 138 states and 253 transitions. [2022-04-06 13:40:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:36,569 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 [2022-04-06 13:40:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:36,571 INFO L225 Difference]: With dead ends: 138 [2022-04-06 13:40:36,571 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 13:40:36,572 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 [2022-04-06 13:40:36,573 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:36,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 111 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 13:40:36,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-04-06 13:40:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.860759493670886) internal successors, (147), 79 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 150 transitions. [2022-04-06 13:40:36,586 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 150 transitions. Word has length 23 [2022-04-06 13:40:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:36,587 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 150 transitions. [2022-04-06 13:40:36,587 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) [2022-04-06 13:40:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 150 transitions. [2022-04-06 13:40:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 13:40:36,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:36,588 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] [2022-04-06 13:40:36,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 13:40:36,589 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -709089080, now seen corresponding path program 1 times [2022-04-06 13:40:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:36,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298459338] [2022-04-06 13:40:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:36,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:36,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:36,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:36,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298459338] [2022-04-06 13:40:36,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298459338] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:36,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:36,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:36,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131173166] [2022-04-06 13:40:36,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:36,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:36,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:36,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:36,666 INFO L87 Difference]: Start difference. First operand 83 states and 150 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) [2022-04-06 13:40:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:36,783 INFO L93 Difference]: Finished difference Result 127 states and 226 transitions. [2022-04-06 13:40:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:36,784 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 [2022-04-06 13:40:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:36,785 INFO L225 Difference]: With dead ends: 127 [2022-04-06 13:40:36,785 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 13:40:36,785 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 [2022-04-06 13:40:36,787 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:36,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 133 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 13:40:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-04-06 13:40:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 82 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 152 transitions. [2022-04-06 13:40:36,807 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 152 transitions. Word has length 24 [2022-04-06 13:40:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:36,808 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 152 transitions. [2022-04-06 13:40:36,808 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) [2022-04-06 13:40:36,808 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 152 transitions. [2022-04-06 13:40:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 13:40:36,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:36,811 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] [2022-04-06 13:40:36,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 13:40:36,812 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:36,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1219623257, now seen corresponding path program 1 times [2022-04-06 13:40:36,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:36,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943709074] [2022-04-06 13:40:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:36,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:36,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:36,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:36,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943709074] [2022-04-06 13:40:36,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943709074] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:36,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:36,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:36,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394322864] [2022-04-06 13:40:36,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:36,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:36,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:36,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:36,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:36,902 INFO L87 Difference]: Start difference. First operand 86 states and 152 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) [2022-04-06 13:40:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:37,005 INFO L93 Difference]: Finished difference Result 161 states and 289 transitions. [2022-04-06 13:40:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:37,006 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 [2022-04-06 13:40:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:37,012 INFO L225 Difference]: With dead ends: 161 [2022-04-06 13:40:37,012 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 13:40:37,012 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 [2022-04-06 13:40:37,022 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 195 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:37,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 13:40:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2022-04-06 13:40:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.81651376146789) internal successors, (198), 109 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 201 transitions. [2022-04-06 13:40:37,044 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 201 transitions. Word has length 24 [2022-04-06 13:40:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:37,044 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 201 transitions. [2022-04-06 13:40:37,044 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) [2022-04-06 13:40:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 201 transitions. [2022-04-06 13:40:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 13:40:37,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:37,045 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] [2022-04-06 13:40:37,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 13:40:37,045 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:37,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash 287928552, now seen corresponding path program 1 times [2022-04-06 13:40:37,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:37,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338947521] [2022-04-06 13:40:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:37,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:37,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:37,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338947521] [2022-04-06 13:40:37,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338947521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:37,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:37,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:37,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518922700] [2022-04-06 13:40:37,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:37,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:37,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:37,116 INFO L87 Difference]: Start difference. First operand 113 states and 201 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) [2022-04-06 13:40:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:37,210 INFO L93 Difference]: Finished difference Result 265 states and 479 transitions. [2022-04-06 13:40:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:37,211 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 [2022-04-06 13:40:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:37,212 INFO L225 Difference]: With dead ends: 265 [2022-04-06 13:40:37,212 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 13:40:37,213 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 [2022-04-06 13:40:37,214 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:37,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 113 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 13:40:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-04-06 13:40:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8064516129032258) internal successors, (280), 155 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 283 transitions. [2022-04-06 13:40:37,226 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 283 transitions. Word has length 24 [2022-04-06 13:40:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:37,226 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 283 transitions. [2022-04-06 13:40:37,226 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) [2022-04-06 13:40:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 283 transitions. [2022-04-06 13:40:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 13:40:37,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:37,227 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, 1] [2022-04-06 13:40:37,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 13:40:37,228 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 846416876, now seen corresponding path program 1 times [2022-04-06 13:40:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:37,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965824054] [2022-04-06 13:40:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:37,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:37,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:37,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965824054] [2022-04-06 13:40:37,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965824054] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:37,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:37,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:37,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460903345] [2022-04-06 13:40:37,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:37,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:37,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:37,272 INFO L87 Difference]: Start difference. First operand 159 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:37,361 INFO L93 Difference]: Finished difference Result 238 states and 422 transitions. [2022-04-06 13:40:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-04-06 13:40:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:37,363 INFO L225 Difference]: With dead ends: 238 [2022-04-06 13:40:37,363 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 13:40:37,367 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 [2022-04-06 13:40:37,371 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:37,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 130 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 13:40:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2022-04-06 13:40:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.78343949044586) internal successors, (280), 157 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 283 transitions. [2022-04-06 13:40:37,389 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 283 transitions. Word has length 25 [2022-04-06 13:40:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:37,389 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 283 transitions. [2022-04-06 13:40:37,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 283 transitions. [2022-04-06 13:40:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 13:40:37,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:37,391 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, 1] [2022-04-06 13:40:37,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 13:40:37,391 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:37,392 INFO L85 PathProgramCache]: Analyzing trace with hash 335882699, now seen corresponding path program 1 times [2022-04-06 13:40:37,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:37,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550686102] [2022-04-06 13:40:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:37,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:37,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:37,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550686102] [2022-04-06 13:40:37,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550686102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:37,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:37,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186427219] [2022-04-06 13:40:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:37,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:37,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:37,456 INFO L87 Difference]: Start difference. First operand 161 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:37,546 INFO L93 Difference]: Finished difference Result 301 states and 537 transitions. [2022-04-06 13:40:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:37,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-04-06 13:40:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:37,549 INFO L225 Difference]: With dead ends: 301 [2022-04-06 13:40:37,549 INFO L226 Difference]: Without dead ends: 299 [2022-04-06 13:40:37,549 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 [2022-04-06 13:40:37,552 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:37,553 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-04-06 13:40:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 217. [2022-04-06 13:40:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 213 states have (on average 1.7652582159624413) internal successors, (376), 213 states have internal predecessors, (376), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 379 transitions. [2022-04-06 13:40:37,563 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 379 transitions. Word has length 25 [2022-04-06 13:40:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:37,563 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 379 transitions. [2022-04-06 13:40:37,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 379 transitions. [2022-04-06 13:40:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 13:40:37,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:37,565 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, 1] [2022-04-06 13:40:37,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 13:40:37,565 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:37,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1843434508, now seen corresponding path program 1 times [2022-04-06 13:40:37,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:37,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399145129] [2022-04-06 13:40:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:37,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:37,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:37,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399145129] [2022-04-06 13:40:37,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399145129] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:37,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:37,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:37,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219273512] [2022-04-06 13:40:37,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:37,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:37,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:37,601 INFO L87 Difference]: Start difference. First operand 217 states and 379 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:37,676 INFO L93 Difference]: Finished difference Result 513 states and 905 transitions. [2022-04-06 13:40:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:37,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-04-06 13:40:37,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:37,679 INFO L225 Difference]: With dead ends: 513 [2022-04-06 13:40:37,679 INFO L226 Difference]: Without dead ends: 307 [2022-04-06 13:40:37,681 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 [2022-04-06 13:40:37,682 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:37,682 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 115 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-04-06 13:40:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2022-04-06 13:40:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.7541528239202657) internal successors, (528), 301 states have internal predecessors, (528), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 531 transitions. [2022-04-06 13:40:37,693 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 531 transitions. Word has length 25 [2022-04-06 13:40:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:37,693 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 531 transitions. [2022-04-06 13:40:37,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 531 transitions. [2022-04-06 13:40:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 13:40:37,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:37,695 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, 1, 1] [2022-04-06 13:40:37,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 13:40:37,695 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1822461380, now seen corresponding path program 1 times [2022-04-06 13:40:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:37,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783923228] [2022-04-06 13:40:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:37,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:37,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783923228] [2022-04-06 13:40:37,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783923228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:37,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:37,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:37,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810126279] [2022-04-06 13:40:37,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:37,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:37,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:37,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:37,768 INFO L87 Difference]: Start difference. First operand 305 states and 531 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:37,853 INFO L93 Difference]: Finished difference Result 457 states and 793 transitions. [2022-04-06 13:40:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:37,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2022-04-06 13:40:37,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:37,857 INFO L225 Difference]: With dead ends: 457 [2022-04-06 13:40:37,857 INFO L226 Difference]: Without dead ends: 311 [2022-04-06 13:40:37,857 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 [2022-04-06 13:40:37,859 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 155 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:37,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 127 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-04-06 13:40:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-04-06 13:40:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.7311475409836066) internal successors, (528), 305 states have internal predecessors, (528), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 531 transitions. [2022-04-06 13:40:37,869 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 531 transitions. Word has length 26 [2022-04-06 13:40:37,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:37,876 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 531 transitions. [2022-04-06 13:40:37,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 531 transitions. [2022-04-06 13:40:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 13:40:37,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:37,877 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, 1, 1] [2022-04-06 13:40:37,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 13:40:37,878 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:37,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1311927203, now seen corresponding path program 1 times [2022-04-06 13:40:37,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:37,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108978884] [2022-04-06 13:40:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:37,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:37,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:37,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108978884] [2022-04-06 13:40:37,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108978884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:37,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:37,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:37,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997179692] [2022-04-06 13:40:37,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:37,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:37,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:37,942 INFO L87 Difference]: Start difference. First operand 309 states and 531 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:38,016 INFO L93 Difference]: Finished difference Result 573 states and 1001 transitions. [2022-04-06 13:40:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:38,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2022-04-06 13:40:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:38,020 INFO L225 Difference]: With dead ends: 573 [2022-04-06 13:40:38,020 INFO L226 Difference]: Without dead ends: 571 [2022-04-06 13:40:38,021 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 [2022-04-06 13:40:38,021 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:38,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-04-06 13:40:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 425. [2022-04-06 13:40:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.700712589073634) internal successors, (716), 421 states have internal predecessors, (716), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 719 transitions. [2022-04-06 13:40:38,036 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 719 transitions. Word has length 26 [2022-04-06 13:40:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:38,037 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 719 transitions. [2022-04-06 13:40:38,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 719 transitions. [2022-04-06 13:40:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 13:40:38,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:38,041 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, 1, 1] [2022-04-06 13:40:38,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 13:40:38,041 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1475488284, now seen corresponding path program 1 times [2022-04-06 13:40:38,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:38,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595229258] [2022-04-06 13:40:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:38,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:38,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595229258] [2022-04-06 13:40:38,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595229258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:38,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:38,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394801394] [2022-04-06 13:40:38,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:38,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:38,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:38,095 INFO L87 Difference]: Start difference. First operand 425 states and 719 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:38,180 INFO L93 Difference]: Finished difference Result 1005 states and 1713 transitions. [2022-04-06 13:40:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2022-04-06 13:40:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:38,184 INFO L225 Difference]: With dead ends: 1005 [2022-04-06 13:40:38,184 INFO L226 Difference]: Without dead ends: 595 [2022-04-06 13:40:38,185 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 [2022-04-06 13:40:38,186 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:38,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-04-06 13:40:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2022-04-06 13:40:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 1.6910016977928692) internal successors, (996), 589 states have internal predecessors, (996), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 999 transitions. [2022-04-06 13:40:38,204 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 999 transitions. Word has length 26 [2022-04-06 13:40:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:38,204 INFO L478 AbstractCegarLoop]: Abstraction has 593 states and 999 transitions. [2022-04-06 13:40:38,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 999 transitions. [2022-04-06 13:40:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 13:40:38,205 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:38,205 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, 1, 1, 1] [2022-04-06 13:40:38,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 13:40:38,206 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:38,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2015070056, now seen corresponding path program 1 times [2022-04-06 13:40:38,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:38,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890281606] [2022-04-06 13:40:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:38,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890281606] [2022-04-06 13:40:38,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890281606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:38,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:38,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:38,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656411328] [2022-04-06 13:40:38,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:38,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:38,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:38,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:38,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:38,253 INFO L87 Difference]: Start difference. First operand 593 states and 999 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:38,330 INFO L93 Difference]: Finished difference Result 889 states and 1493 transitions. [2022-04-06 13:40:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-04-06 13:40:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:38,334 INFO L225 Difference]: With dead ends: 889 [2022-04-06 13:40:38,334 INFO L226 Difference]: Without dead ends: 603 [2022-04-06 13:40:38,335 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 [2022-04-06 13:40:38,336 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:38,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 124 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-04-06 13:40:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2022-04-06 13:40:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.6683417085427135) internal successors, (996), 597 states have internal predecessors, (996), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 999 transitions. [2022-04-06 13:40:38,352 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 999 transitions. Word has length 27 [2022-04-06 13:40:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:38,352 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 999 transitions. [2022-04-06 13:40:38,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 999 transitions. [2022-04-06 13:40:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 13:40:38,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:38,353 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, 1, 1, 1] [2022-04-06 13:40:38,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 13:40:38,353 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1504535879, now seen corresponding path program 1 times [2022-04-06 13:40:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:38,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275206125] [2022-04-06 13:40:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:38,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:38,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275206125] [2022-04-06 13:40:38,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275206125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:38,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:38,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:38,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291709917] [2022-04-06 13:40:38,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:38,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:38,390 INFO L87 Difference]: Start difference. First operand 601 states and 999 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:38,470 INFO L93 Difference]: Finished difference Result 1101 states and 1865 transitions. [2022-04-06 13:40:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:38,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-04-06 13:40:38,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:38,475 INFO L225 Difference]: With dead ends: 1101 [2022-04-06 13:40:38,475 INFO L226 Difference]: Without dead ends: 1099 [2022-04-06 13:40:38,476 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 [2022-04-06 13:40:38,477 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:38,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-04-06 13:40:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 841. [2022-04-06 13:40:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 837 states have (on average 1.6296296296296295) internal successors, (1364), 837 states have internal predecessors, (1364), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1367 transitions. [2022-04-06 13:40:38,502 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1367 transitions. Word has length 27 [2022-04-06 13:40:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:38,503 INFO L478 AbstractCegarLoop]: Abstraction has 841 states and 1367 transitions. [2022-04-06 13:40:38,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1367 transitions. [2022-04-06 13:40:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 13:40:38,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:38,507 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, 1, 1, 1] [2022-04-06 13:40:38,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 13:40:38,508 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:38,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1282879608, now seen corresponding path program 1 times [2022-04-06 13:40:38,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:38,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481626735] [2022-04-06 13:40:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:38,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481626735] [2022-04-06 13:40:38,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481626735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:38,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:38,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991190687] [2022-04-06 13:40:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:38,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:38,545 INFO L87 Difference]: Start difference. First operand 841 states and 1367 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:38,629 INFO L93 Difference]: Finished difference Result 1981 states and 3241 transitions. [2022-04-06 13:40:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-04-06 13:40:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:38,634 INFO L225 Difference]: With dead ends: 1981 [2022-04-06 13:40:38,635 INFO L226 Difference]: Without dead ends: 1163 [2022-04-06 13:40:38,636 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 [2022-04-06 13:40:38,637 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:38,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-04-06 13:40:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1161. [2022-04-06 13:40:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1157 states have (on average 1.6214347450302506) internal successors, (1876), 1157 states have internal predecessors, (1876), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1879 transitions. [2022-04-06 13:40:38,700 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1879 transitions. Word has length 27 [2022-04-06 13:40:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:38,700 INFO L478 AbstractCegarLoop]: Abstraction has 1161 states and 1879 transitions. [2022-04-06 13:40:38,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1879 transitions. [2022-04-06 13:40:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:40:38,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:38,702 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, 1, 1, 1, 1] [2022-04-06 13:40:38,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 13:40:38,702 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash -603995456, now seen corresponding path program 1 times [2022-04-06 13:40:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:38,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590833940] [2022-04-06 13:40:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:38,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:38,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590833940] [2022-04-06 13:40:38,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590833940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:38,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:38,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817408025] [2022-04-06 13:40:38,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:38,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:38,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:38,744 INFO L87 Difference]: Start difference. First operand 1161 states and 1879 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:38,823 INFO L93 Difference]: Finished difference Result 1741 states and 2809 transitions. [2022-04-06 13:40:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-04-06 13:40:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:38,827 INFO L225 Difference]: With dead ends: 1741 [2022-04-06 13:40:38,828 INFO L226 Difference]: Without dead ends: 1179 [2022-04-06 13:40:38,830 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 [2022-04-06 13:40:38,831 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:38,831 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 121 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-04-06 13:40:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2022-04-06 13:40:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1173 states have (on average 1.5993179880647912) internal successors, (1876), 1173 states have internal predecessors, (1876), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1879 transitions. [2022-04-06 13:40:38,863 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1879 transitions. Word has length 28 [2022-04-06 13:40:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:38,864 INFO L478 AbstractCegarLoop]: Abstraction has 1177 states and 1879 transitions. [2022-04-06 13:40:38,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1879 transitions. [2022-04-06 13:40:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:40:38,866 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:38,866 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, 1, 1, 1, 1] [2022-04-06 13:40:38,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 13:40:38,866 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:38,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1114529633, now seen corresponding path program 1 times [2022-04-06 13:40:38,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:38,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644251984] [2022-04-06 13:40:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:38,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:38,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644251984] [2022-04-06 13:40:38,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644251984] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:38,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:38,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:38,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935818481] [2022-04-06 13:40:38,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:38,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:38,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:38,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:38,910 INFO L87 Difference]: Start difference. First operand 1177 states and 1879 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:39,003 INFO L93 Difference]: Finished difference Result 2125 states and 3465 transitions. [2022-04-06 13:40:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-04-06 13:40:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:39,012 INFO L225 Difference]: With dead ends: 2125 [2022-04-06 13:40:39,012 INFO L226 Difference]: Without dead ends: 2123 [2022-04-06 13:40:39,013 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 [2022-04-06 13:40:39,013 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:39,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-04-06 13:40:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1673. [2022-04-06 13:40:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1669 states have (on average 1.555422408627921) internal successors, (2596), 1669 states have internal predecessors, (2596), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2599 transitions. [2022-04-06 13:40:39,066 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2599 transitions. Word has length 28 [2022-04-06 13:40:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:39,067 INFO L478 AbstractCegarLoop]: Abstraction has 1673 states and 2599 transitions. [2022-04-06 13:40:39,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2599 transitions. [2022-04-06 13:40:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:40:39,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:39,069 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, 1, 1, 1, 1] [2022-04-06 13:40:39,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-06 13:40:39,070 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash 393022176, now seen corresponding path program 1 times [2022-04-06 13:40:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:39,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913208701] [2022-04-06 13:40:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:39,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:39,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:39,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:39,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913208701] [2022-04-06 13:40:39,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913208701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:39,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:39,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:39,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408348732] [2022-04-06 13:40:39,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:39,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:39,105 INFO L87 Difference]: Start difference. First operand 1673 states and 2599 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:39,200 INFO L93 Difference]: Finished difference Result 3917 states and 6121 transitions. [2022-04-06 13:40:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-04-06 13:40:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:39,208 INFO L225 Difference]: With dead ends: 3917 [2022-04-06 13:40:39,208 INFO L226 Difference]: Without dead ends: 2283 [2022-04-06 13:40:39,213 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 [2022-04-06 13:40:39,214 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:39,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 121 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-04-06 13:40:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2281. [2022-04-06 13:40:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.5476504172156347) internal successors, (3524), 2277 states have internal predecessors, (3524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3527 transitions. [2022-04-06 13:40:39,277 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3527 transitions. Word has length 28 [2022-04-06 13:40:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:39,277 INFO L478 AbstractCegarLoop]: Abstraction has 2281 states and 3527 transitions. [2022-04-06 13:40:39,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3527 transitions. [2022-04-06 13:40:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 13:40:39,280 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:39,280 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, 1, 1, 1, 1, 1] [2022-04-06 13:40:39,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-06 13:40:39,280 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -190647580, now seen corresponding path program 1 times [2022-04-06 13:40:39,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:39,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280296771] [2022-04-06 13:40:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:39,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:39,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:39,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:39,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280296771] [2022-04-06 13:40:39,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280296771] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:39,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:39,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:39,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966241291] [2022-04-06 13:40:39,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:39,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:39,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:39,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:39,321 INFO L87 Difference]: Start difference. First operand 2281 states and 3527 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:39,411 INFO L93 Difference]: Finished difference Result 3421 states and 5273 transitions. [2022-04-06 13:40:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-04-06 13:40:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:39,419 INFO L225 Difference]: With dead ends: 3421 [2022-04-06 13:40:39,419 INFO L226 Difference]: Without dead ends: 2315 [2022-04-06 13:40:39,422 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 [2022-04-06 13:40:39,422 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:39,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-04-06 13:40:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-04-06 13:40:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2309 states have (on average 1.5262018189692508) internal successors, (3524), 2309 states have internal predecessors, (3524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3527 transitions. [2022-04-06 13:40:39,508 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3527 transitions. Word has length 29 [2022-04-06 13:40:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:39,508 INFO L478 AbstractCegarLoop]: Abstraction has 2313 states and 3527 transitions. [2022-04-06 13:40:39,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3527 transitions. [2022-04-06 13:40:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 13:40:39,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:39,511 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, 1, 1, 1, 1, 1] [2022-04-06 13:40:39,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-06 13:40:39,511 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash -701181757, now seen corresponding path program 1 times [2022-04-06 13:40:39,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:39,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205444478] [2022-04-06 13:40:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:39,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:39,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:39,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205444478] [2022-04-06 13:40:39,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205444478] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:39,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:39,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:39,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009585157] [2022-04-06 13:40:39,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:39,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:39,557 INFO L87 Difference]: Start difference. First operand 2313 states and 3527 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:39,671 INFO L93 Difference]: Finished difference Result 4109 states and 6409 transitions. [2022-04-06 13:40:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-04-06 13:40:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:39,686 INFO L225 Difference]: With dead ends: 4109 [2022-04-06 13:40:39,687 INFO L226 Difference]: Without dead ends: 4107 [2022-04-06 13:40:39,689 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 [2022-04-06 13:40:39,689 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:39,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-04-06 13:40:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3337. [2022-04-06 13:40:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.4797479747974798) internal successors, (4932), 3333 states have internal predecessors, (4932), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4935 transitions. [2022-04-06 13:40:39,778 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4935 transitions. Word has length 29 [2022-04-06 13:40:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:39,778 INFO L478 AbstractCegarLoop]: Abstraction has 3337 states and 4935 transitions. [2022-04-06 13:40:39,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4935 transitions. [2022-04-06 13:40:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 13:40:39,783 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:39,783 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, 1, 1, 1, 1, 1] [2022-04-06 13:40:39,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 13:40:39,783 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:39,784 INFO L85 PathProgramCache]: Analyzing trace with hash 806370052, now seen corresponding path program 1 times [2022-04-06 13:40:39,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:39,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737414379] [2022-04-06 13:40:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:39,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:39,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:39,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:39,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737414379] [2022-04-06 13:40:39,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737414379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:39,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:39,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:39,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90158700] [2022-04-06 13:40:39,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:39,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:39,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:39,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:39,813 INFO L87 Difference]: Start difference. First operand 3337 states and 4935 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:39,936 INFO L93 Difference]: Finished difference Result 7757 states and 11529 transitions. [2022-04-06 13:40:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:39,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-04-06 13:40:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:39,952 INFO L225 Difference]: With dead ends: 7757 [2022-04-06 13:40:39,952 INFO L226 Difference]: Without dead ends: 4491 [2022-04-06 13:40:39,958 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 [2022-04-06 13:40:39,960 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:39,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 123 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-04-06 13:40:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4489. [2022-04-06 13:40:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4485 states have (on average 1.470680044593088) internal successors, (6596), 4485 states have internal predecessors, (6596), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6599 transitions. [2022-04-06 13:40:40,070 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6599 transitions. Word has length 29 [2022-04-06 13:40:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:40,070 INFO L478 AbstractCegarLoop]: Abstraction has 4489 states and 6599 transitions. [2022-04-06 13:40:40,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6599 transitions. [2022-04-06 13:40:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 13:40:40,076 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:40,076 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, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:40,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 13:40:40,076 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -261765188, now seen corresponding path program 1 times [2022-04-06 13:40:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:40,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747280428] [2022-04-06 13:40:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:40,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:40,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:40,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747280428] [2022-04-06 13:40:40,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747280428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:40,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:40,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:40,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176693157] [2022-04-06 13:40:40,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:40,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:40,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:40,121 INFO L87 Difference]: Start difference. First operand 4489 states and 6599 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:40,227 INFO L93 Difference]: Finished difference Result 6733 states and 9865 transitions. [2022-04-06 13:40:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-04-06 13:40:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:40,243 INFO L225 Difference]: With dead ends: 6733 [2022-04-06 13:40:40,243 INFO L226 Difference]: Without dead ends: 4555 [2022-04-06 13:40:40,247 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 [2022-04-06 13:40:40,248 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:40,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2022-04-06 13:40:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4553. [2022-04-06 13:40:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4549 states have (on average 1.449989008573313) internal successors, (6596), 4549 states have internal predecessors, (6596), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6599 transitions. [2022-04-06 13:40:40,350 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6599 transitions. Word has length 30 [2022-04-06 13:40:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:40,350 INFO L478 AbstractCegarLoop]: Abstraction has 4553 states and 6599 transitions. [2022-04-06 13:40:40,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6599 transitions. [2022-04-06 13:40:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 13:40:40,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:40,356 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, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:40,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-06 13:40:40,356 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash -772299365, now seen corresponding path program 1 times [2022-04-06 13:40:40,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:40,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355726224] [2022-04-06 13:40:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:40,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:40,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:40,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:40,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355726224] [2022-04-06 13:40:40,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355726224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:40,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:40,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486566785] [2022-04-06 13:40:40,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:40,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:40,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:40,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:40,389 INFO L87 Difference]: Start difference. First operand 4553 states and 6599 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:40,517 INFO L93 Difference]: Finished difference Result 7949 states and 11785 transitions. [2022-04-06 13:40:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-04-06 13:40:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:40,535 INFO L225 Difference]: With dead ends: 7949 [2022-04-06 13:40:40,535 INFO L226 Difference]: Without dead ends: 7947 [2022-04-06 13:40:40,539 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 [2022-04-06 13:40:40,540 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:40,540 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-04-06 13:40:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6665. [2022-04-06 13:40:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.4033928839513587) internal successors, (9348), 6661 states have internal predecessors, (9348), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 9351 transitions. [2022-04-06 13:40:40,726 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 9351 transitions. Word has length 30 [2022-04-06 13:40:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:40,726 INFO L478 AbstractCegarLoop]: Abstraction has 6665 states and 9351 transitions. [2022-04-06 13:40:40,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 9351 transitions. [2022-04-06 13:40:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 13:40:40,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:40,736 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, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:40,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-06 13:40:40,737 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 735252444, now seen corresponding path program 1 times [2022-04-06 13:40:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:40,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480105267] [2022-04-06 13:40:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:40,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:40,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:40,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480105267] [2022-04-06 13:40:40,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480105267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:40,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:40,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:40,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052240271] [2022-04-06 13:40:40,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:40,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:40,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:40,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:40,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:40,772 INFO L87 Difference]: Start difference. First operand 6665 states and 9351 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:40,934 INFO L93 Difference]: Finished difference Result 15373 states and 21641 transitions. [2022-04-06 13:40:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-04-06 13:40:40,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:40,951 INFO L225 Difference]: With dead ends: 15373 [2022-04-06 13:40:40,952 INFO L226 Difference]: Without dead ends: 8843 [2022-04-06 13:40:40,966 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 [2022-04-06 13:40:40,967 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:40,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 125 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:40,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2022-04-06 13:40:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8841. [2022-04-06 13:40:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8837 states have (on average 1.3909697861265136) internal successors, (12292), 8837 states have internal predecessors, (12292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12295 transitions. [2022-04-06 13:40:41,217 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12295 transitions. Word has length 30 [2022-04-06 13:40:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:41,217 INFO L478 AbstractCegarLoop]: Abstraction has 8841 states and 12295 transitions. [2022-04-06 13:40:41,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12295 transitions. [2022-04-06 13:40:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 13:40:41,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:41,227 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:41,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-06 13:40:41,227 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1828556384, now seen corresponding path program 1 times [2022-04-06 13:40:41,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:41,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265364892] [2022-04-06 13:40:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:41,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:41,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:41,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:41,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265364892] [2022-04-06 13:40:41,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265364892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:41,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:41,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602152645] [2022-04-06 13:40:41,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:41,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:41,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:41,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:41,255 INFO L87 Difference]: Start difference. First operand 8841 states and 12295 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:41,404 INFO L93 Difference]: Finished difference Result 13261 states and 18377 transitions. [2022-04-06 13:40:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-04-06 13:40:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:41,422 INFO L225 Difference]: With dead ends: 13261 [2022-04-06 13:40:41,422 INFO L226 Difference]: Without dead ends: 8971 [2022-04-06 13:40:41,432 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 [2022-04-06 13:40:41,433 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:41,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 112 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-04-06 13:40:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8969. [2022-04-06 13:40:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8965 states have (on average 1.3711098717233687) internal successors, (12292), 8965 states have internal predecessors, (12292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12295 transitions. [2022-04-06 13:40:41,684 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12295 transitions. Word has length 31 [2022-04-06 13:40:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:41,684 INFO L478 AbstractCegarLoop]: Abstraction has 8969 states and 12295 transitions. [2022-04-06 13:40:41,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12295 transitions. [2022-04-06 13:40:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 13:40:41,694 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:41,694 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:41,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-06 13:40:41,694 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1318022207, now seen corresponding path program 1 times [2022-04-06 13:40:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9182073] [2022-04-06 13:40:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:41,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:41,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9182073] [2022-04-06 13:40:41,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9182073] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:41,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:41,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:41,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338618112] [2022-04-06 13:40:41,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:41,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:41,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:41,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:41,724 INFO L87 Difference]: Start difference. First operand 8969 states and 12295 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:41,959 INFO L93 Difference]: Finished difference Result 15373 states and 21513 transitions. [2022-04-06 13:40:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:41,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-04-06 13:40:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:41,992 INFO L225 Difference]: With dead ends: 15373 [2022-04-06 13:40:41,992 INFO L226 Difference]: Without dead ends: 15371 [2022-04-06 13:40:42,001 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 [2022-04-06 13:40:42,002 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:42,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2022-04-06 13:40:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13321. [2022-04-06 13:40:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13321 states, 13317 states have (on average 1.326725238417061) internal successors, (17668), 13317 states have internal predecessors, (17668), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13321 states to 13321 states and 17671 transitions. [2022-04-06 13:40:42,331 INFO L78 Accepts]: Start accepts. Automaton has 13321 states and 17671 transitions. Word has length 31 [2022-04-06 13:40:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:42,331 INFO L478 AbstractCegarLoop]: Abstraction has 13321 states and 17671 transitions. [2022-04-06 13:40:42,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 13321 states and 17671 transitions. [2022-04-06 13:40:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 13:40:42,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:42,349 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:42,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-06 13:40:42,350 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:42,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1469393280, now seen corresponding path program 1 times [2022-04-06 13:40:42,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:42,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325591931] [2022-04-06 13:40:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:42,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:42,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:42,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:42,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325591931] [2022-04-06 13:40:42,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325591931] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:42,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:42,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:42,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162567434] [2022-04-06 13:40:42,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:42,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:42,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:42,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:42,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:42,384 INFO L87 Difference]: Start difference. First operand 13321 states and 17671 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:42,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:42,633 INFO L93 Difference]: Finished difference Result 30477 states and 40457 transitions. [2022-04-06 13:40:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:42,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-04-06 13:40:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:42,668 INFO L225 Difference]: With dead ends: 30477 [2022-04-06 13:40:42,668 INFO L226 Difference]: Without dead ends: 17419 [2022-04-06 13:40:42,692 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 [2022-04-06 13:40:42,693 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:42,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 127 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2022-04-06 13:40:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17417. [2022-04-06 13:40:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17417 states, 17413 states have (on average 1.3086774249124218) internal successors, (22788), 17413 states have internal predecessors, (22788), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17417 states to 17417 states and 22791 transitions. [2022-04-06 13:40:43,109 INFO L78 Accepts]: Start accepts. Automaton has 17417 states and 22791 transitions. Word has length 31 [2022-04-06 13:40:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:43,110 INFO L478 AbstractCegarLoop]: Abstraction has 17417 states and 22791 transitions. [2022-04-06 13:40:43,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 17417 states and 22791 transitions. [2022-04-06 13:40:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 13:40:43,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:43,128 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:43,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-06 13:40:43,129 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2090951496, now seen corresponding path program 1 times [2022-04-06 13:40:43,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:43,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690848160] [2022-04-06 13:40:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:43,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:43,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690848160] [2022-04-06 13:40:43,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690848160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:43,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:43,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:43,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114408222] [2022-04-06 13:40:43,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:43,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:43,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:43,153 INFO L87 Difference]: Start difference. First operand 17417 states and 22791 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:43,449 INFO L93 Difference]: Finished difference Result 26125 states and 34057 transitions. [2022-04-06 13:40:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-04-06 13:40:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:43,483 INFO L225 Difference]: With dead ends: 26125 [2022-04-06 13:40:43,483 INFO L226 Difference]: Without dead ends: 17675 [2022-04-06 13:40:43,500 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 [2022-04-06 13:40:43,500 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:43,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2022-04-06 13:40:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17673. [2022-04-06 13:40:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17673 states, 17669 states have (on average 1.2897164525440037) internal successors, (22788), 17669 states have internal predecessors, (22788), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17673 states to 17673 states and 22791 transitions. [2022-04-06 13:40:43,893 INFO L78 Accepts]: Start accepts. Automaton has 17673 states and 22791 transitions. Word has length 32 [2022-04-06 13:40:43,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:43,894 INFO L478 AbstractCegarLoop]: Abstraction has 17673 states and 22791 transitions. [2022-04-06 13:40:43,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 17673 states and 22791 transitions. [2022-04-06 13:40:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 13:40:43,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:43,909 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:43,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-06 13:40:43,909 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1693481623, now seen corresponding path program 1 times [2022-04-06 13:40:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001336612] [2022-04-06 13:40:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:43,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:43,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001336612] [2022-04-06 13:40:43,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001336612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:43,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:43,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423222997] [2022-04-06 13:40:43,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:43,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:43,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:43,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:43,938 INFO L87 Difference]: Start difference. First operand 17673 states and 22791 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:44,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:44,326 INFO L93 Difference]: Finished difference Result 29709 states and 38921 transitions. [2022-04-06 13:40:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:44,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-04-06 13:40:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:44,390 INFO L225 Difference]: With dead ends: 29709 [2022-04-06 13:40:44,391 INFO L226 Difference]: Without dead ends: 29707 [2022-04-06 13:40:44,406 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 [2022-04-06 13:40:44,406 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:44,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 81 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29707 states. [2022-04-06 13:40:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29707 to 26633. [2022-04-06 13:40:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26633 states, 26629 states have (on average 1.249915505651733) internal successors, (33284), 26629 states have internal predecessors, (33284), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:44,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26633 states to 26633 states and 33287 transitions. [2022-04-06 13:40:44,963 INFO L78 Accepts]: Start accepts. Automaton has 26633 states and 33287 transitions. Word has length 32 [2022-04-06 13:40:44,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:44,963 INFO L478 AbstractCegarLoop]: Abstraction has 26633 states and 33287 transitions. [2022-04-06 13:40:44,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:44,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26633 states and 33287 transitions. [2022-04-06 13:40:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 13:40:44,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:44,990 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:44,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-06 13:40:44,991 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:44,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1093933864, now seen corresponding path program 1 times [2022-04-06 13:40:44,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:44,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122571233] [2022-04-06 13:40:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:45,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:45,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122571233] [2022-04-06 13:40:45,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122571233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:45,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:45,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:45,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052050414] [2022-04-06 13:40:45,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:45,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:45,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:45,018 INFO L87 Difference]: Start difference. First operand 26633 states and 33287 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:45,602 INFO L93 Difference]: Finished difference Result 60429 states and 75273 transitions. [2022-04-06 13:40:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:45,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-04-06 13:40:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:45,743 INFO L225 Difference]: With dead ends: 60429 [2022-04-06 13:40:45,743 INFO L226 Difference]: Without dead ends: 34315 [2022-04-06 13:40:45,771 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 [2022-04-06 13:40:45,772 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:45,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 129 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2022-04-06 13:40:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34313. [2022-04-06 13:40:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2238188230493456) internal successors, (41988), 34309 states have internal predecessors, (41988), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 41991 transitions. [2022-04-06 13:40:46,560 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 41991 transitions. Word has length 32 [2022-04-06 13:40:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:46,560 INFO L478 AbstractCegarLoop]: Abstraction has 34313 states and 41991 transitions. [2022-04-06 13:40:46,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 41991 transitions. [2022-04-06 13:40:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 13:40:46,583 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:46,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:46,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-06 13:40:46,584 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:46,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash 958355932, now seen corresponding path program 1 times [2022-04-06 13:40:46,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:46,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097629858] [2022-04-06 13:40:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:46,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:46,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:46,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097629858] [2022-04-06 13:40:46,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097629858] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:46,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:46,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819559138] [2022-04-06 13:40:46,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:46,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:46,611 INFO L87 Difference]: Start difference. First operand 34313 states and 41991 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:47,172 INFO L93 Difference]: Finished difference Result 51469 states and 62729 transitions. [2022-04-06 13:40:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:47,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-04-06 13:40:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:47,232 INFO L225 Difference]: With dead ends: 51469 [2022-04-06 13:40:47,233 INFO L226 Difference]: Without dead ends: 34827 [2022-04-06 13:40:47,257 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 [2022-04-06 13:40:47,258 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:47,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34827 states. [2022-04-06 13:40:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34827 to 34825. [2022-04-06 13:40:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34825 states, 34821 states have (on average 1.2058240716808821) internal successors, (41988), 34821 states have internal predecessors, (41988), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34825 states to 34825 states and 41991 transitions. [2022-04-06 13:40:47,941 INFO L78 Accepts]: Start accepts. Automaton has 34825 states and 41991 transitions. Word has length 33 [2022-04-06 13:40:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:48,074 INFO L478 AbstractCegarLoop]: Abstraction has 34825 states and 41991 transitions. [2022-04-06 13:40:48,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 34825 states and 41991 transitions. [2022-04-06 13:40:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 13:40:48,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:48,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:48,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-06 13:40:48,098 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash 447821755, now seen corresponding path program 1 times [2022-04-06 13:40:48,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:48,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767692863] [2022-04-06 13:40:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:48,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:48,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:48,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767692863] [2022-04-06 13:40:48,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767692863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:48,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:48,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:48,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548323411] [2022-04-06 13:40:48,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:48,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:48,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:48,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:48,127 INFO L87 Difference]: Start difference. First operand 34825 states and 41991 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:48,722 INFO L93 Difference]: Finished difference Result 57357 states and 69641 transitions. [2022-04-06 13:40:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:48,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-04-06 13:40:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:48,807 INFO L225 Difference]: With dead ends: 57357 [2022-04-06 13:40:48,808 INFO L226 Difference]: Without dead ends: 57355 [2022-04-06 13:40:48,821 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 [2022-04-06 13:40:48,821 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:48,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57355 states. [2022-04-06 13:40:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57355 to 53257. [2022-04-06 13:40:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53257 states, 53253 states have (on average 1.1730418943533698) internal successors, (62468), 53253 states have internal predecessors, (62468), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53257 states to 53257 states and 62471 transitions. [2022-04-06 13:40:49,701 INFO L78 Accepts]: Start accepts. Automaton has 53257 states and 62471 transitions. Word has length 33 [2022-04-06 13:40:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:49,702 INFO L478 AbstractCegarLoop]: Abstraction has 53257 states and 62471 transitions. [2022-04-06 13:40:49,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 53257 states and 62471 transitions. [2022-04-06 13:40:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 13:40:49,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:49,741 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:49,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-06 13:40:49,741 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:49,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1955373564, now seen corresponding path program 1 times [2022-04-06 13:40:49,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:49,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488189618] [2022-04-06 13:40:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:49,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488189618] [2022-04-06 13:40:49,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488189618] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:49,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:49,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942138125] [2022-04-06 13:40:49,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:49,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:49,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:49,767 INFO L87 Difference]: Start difference. First operand 53257 states and 62471 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:50,691 INFO L93 Difference]: Finished difference Result 119821 states and 139273 transitions. [2022-04-06 13:40:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:50,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-04-06 13:40:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:50,770 INFO L225 Difference]: With dead ends: 119821 [2022-04-06 13:40:50,771 INFO L226 Difference]: Without dead ends: 67595 [2022-04-06 13:40:50,836 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 [2022-04-06 13:40:50,837 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:50,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67595 states. [2022-04-06 13:40:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67595 to 67593. [2022-04-06 13:40:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67593 states, 67589 states have (on average 1.1363387533474383) internal successors, (76804), 67589 states have internal predecessors, (76804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67593 states to 67593 states and 76807 transitions. [2022-04-06 13:40:52,333 INFO L78 Accepts]: Start accepts. Automaton has 67593 states and 76807 transitions. Word has length 33 [2022-04-06 13:40:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:52,333 INFO L478 AbstractCegarLoop]: Abstraction has 67593 states and 76807 transitions. [2022-04-06 13:40:52,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 67593 states and 76807 transitions. [2022-04-06 13:40:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 13:40:52,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:52,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:52,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-06 13:40:52,374 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash 997605812, now seen corresponding path program 1 times [2022-04-06 13:40:52,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:52,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562778496] [2022-04-06 13:40:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:52,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:52,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562778496] [2022-04-06 13:40:52,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562778496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:52,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:52,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:52,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558353671] [2022-04-06 13:40:52,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:52,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:52,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:52,404 INFO L87 Difference]: Start difference. First operand 67593 states and 76807 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:53,393 INFO L93 Difference]: Finished difference Result 101389 states and 114697 transitions. [2022-04-06 13:40:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-04-06 13:40:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:53,479 INFO L225 Difference]: With dead ends: 101389 [2022-04-06 13:40:53,479 INFO L226 Difference]: Without dead ends: 68619 [2022-04-06 13:40:53,508 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 [2022-04-06 13:40:53,508 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:53,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 103 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2022-04-06 13:40:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68617. [2022-04-06 13:40:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68617 states, 68613 states have (on average 1.119379709384519) internal successors, (76804), 68613 states have internal predecessors, (76804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68617 states to 68617 states and 76807 transitions. [2022-04-06 13:40:54,861 INFO L78 Accepts]: Start accepts. Automaton has 68617 states and 76807 transitions. Word has length 34 [2022-04-06 13:40:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:54,862 INFO L478 AbstractCegarLoop]: Abstraction has 68617 states and 76807 transitions. [2022-04-06 13:40:54,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 68617 states and 76807 transitions. [2022-04-06 13:40:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 13:40:54,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:54,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:54,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-06 13:40:54,896 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash 487071635, now seen corresponding path program 1 times [2022-04-06 13:40:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:54,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571616723] [2022-04-06 13:40:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:54,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:54,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:54,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571616723] [2022-04-06 13:40:54,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571616723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:54,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:54,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465246805] [2022-04-06 13:40:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:54,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:54,926 INFO L87 Difference]: Start difference. First operand 68617 states and 76807 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:56,097 INFO L93 Difference]: Finished difference Result 110603 states and 122888 transitions. [2022-04-06 13:40:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:56,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-04-06 13:40:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:56,247 INFO L225 Difference]: With dead ends: 110603 [2022-04-06 13:40:56,247 INFO L226 Difference]: Without dead ends: 110601 [2022-04-06 13:40:56,266 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 [2022-04-06 13:40:56,267 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:56,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 78 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2022-04-06 13:40:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 106505. [2022-04-06 13:40:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106505 states, 106501 states have (on average 1.0961399423479592) internal successors, (116740), 106501 states have internal predecessors, (116740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106505 states to 106505 states and 116743 transitions. [2022-04-06 13:40:58,127 INFO L78 Accepts]: Start accepts. Automaton has 106505 states and 116743 transitions. Word has length 34 [2022-04-06 13:40:58,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:58,127 INFO L478 AbstractCegarLoop]: Abstraction has 106505 states and 116743 transitions. [2022-04-06 13:40:58,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 106505 states and 116743 transitions. [2022-04-06 13:40:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 13:40:58,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:58,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:40:58,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-06 13:40:58,188 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1994623444, now seen corresponding path program 1 times [2022-04-06 13:40:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318756919] [2022-04-06 13:40:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:58,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:58,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:58,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318756919] [2022-04-06 13:40:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318756919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:58,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780879767] [2022-04-06 13:40:58,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:58,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:58,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:58,212 INFO L87 Difference]: Start difference. First operand 106505 states and 116743 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:59,871 INFO L93 Difference]: Finished difference Result 237577 states and 256007 transitions. [2022-04-06 13:40:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-04-06 13:40:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:59,873 INFO L225 Difference]: With dead ends: 237577 [2022-04-06 13:40:59,873 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 13:41:00,002 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 [2022-04-06 13:41:00,003 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:41:00,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:41:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 13:41:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 13:41:00,004 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) [2022-04-06 13:41:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 13:41:00,004 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-04-06 13:41:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:41:00,004 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 13:41:00,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 13:41:00,005 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 13:41:00,007 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 13:41:00,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-06 13:41:00,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.