/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/locks/test_locks_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 21:04:32,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 21:04:32,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 21:04:32,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 21:04:32,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 21:04:32,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 21:04:32,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 21:04:32,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 21:04:32,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 21:04:32,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 21:04:32,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 21:04:32,511 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 21:04:32,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 21:04:32,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 21:04:32,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 21:04:32,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 21:04:32,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 21:04:32,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 21:04:32,512 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 21:04:32,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 21:04:32,513 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 21:04:32,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 21:04:32,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 21:04:32,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 21:04:32,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 21:04:32,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 21:04:32,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:04:32,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 21:04:32,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 21:04:32,514 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 21:04:32,514 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 21:04:32,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 21:04:32,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 21:04:32,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 21:04:32,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 21:04:32,752 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 21:04:32,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_13.c [2022-03-18 21:04:32,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763328242/a63e904d25a24504903020ff48f6d0f4/FLAGb9483099d [2022-03-18 21:04:33,174 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 21:04:33,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c [2022-03-18 21:04:33,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763328242/a63e904d25a24504903020ff48f6d0f4/FLAGb9483099d [2022-03-18 21:04:33,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763328242/a63e904d25a24504903020ff48f6d0f4 [2022-03-18 21:04:33,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 21:04:33,195 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 21:04:33,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 21:04:33,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 21:04:33,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 21:04:33,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d0c53af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33, skipping insertion in model container [2022-03-18 21:04:33,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 21:04:33,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 21:04:33,396 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_13.c[4936,4949] [2022-03-18 21:04:33,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:04:33,406 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 21:04:33,427 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_13.c[4936,4949] [2022-03-18 21:04:33,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:04:33,439 INFO L208 MainTranslator]: Completed translation [2022-03-18 21:04:33,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33 WrapperNode [2022-03-18 21:04:33,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 21:04:33,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 21:04:33,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 21:04:33,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 21:04:33,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 21:04:33,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 21:04:33,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 21:04:33,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 21:04:33,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:04:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:04:33,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 21:04:33,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 21:04:33,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 21:04:33,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 21:04:33,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 21:04:33,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 21:04:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 21:04:33,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 21:04:33,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 21:04:33,656 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 21:04:33,657 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 21:04:33,914 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 21:04:33,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 21:04:33,919 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 21:04:33,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:04:33 BoogieIcfgContainer [2022-03-18 21:04:33,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 21:04:33,921 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 21:04:33,921 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 21:04:33,939 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 21:04:33,942 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:04:33" (1/1) ... [2022-03-18 21:04:33,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:04:33 BasicIcfg [2022-03-18 21:04:33,962 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 21:04:33,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 21:04:33,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 21:04:33,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 21:04:33,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 09:04:33" (1/4) ... [2022-03-18 21:04:33,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d93a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:04:33, skipping insertion in model container [2022-03-18 21:04:33,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:33" (2/4) ... [2022-03-18 21:04:33,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d93a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:04:33, skipping insertion in model container [2022-03-18 21:04:33,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:04:33" (3/4) ... [2022-03-18 21:04:33,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d93a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:04:33, skipping insertion in model container [2022-03-18 21:04:33,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:04:33" (4/4) ... [2022-03-18 21:04:33,975 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.cJordan [2022-03-18 21:04:33,979 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 21:04:33,980 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 21:04:34,020 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 21:04:34,025 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 21:04:34,026 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 21:04:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 21:04:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 21:04:34,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:34,045 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:34,046 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1381361359, now seen corresponding path program 1 times [2022-03-18 21:04:34,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:34,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152758706] [2022-03-18 21:04:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:34,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:34,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:34,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:34,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152758706] [2022-03-18 21:04:34,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152758706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:34,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:34,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:34,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576679886] [2022-03-18 21:04:34,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:34,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:34,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:34,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:34,336 INFO L87 Difference]: Start difference. First operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 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 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:34,529 INFO L93 Difference]: Finished difference Result 99 states and 174 transitions. [2022-03-18 21:04:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-18 21:04:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:34,541 INFO L225 Difference]: With dead ends: 99 [2022-03-18 21:04:34,542 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 21:04:34,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:34,547 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 225 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:34,547 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 107 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 21:04:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-03-18 21:04:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.88135593220339) internal successors, (111), 59 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2022-03-18 21:04:34,577 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 24 [2022-03-18 21:04:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:34,577 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2022-03-18 21:04:34,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2022-03-18 21:04:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 21:04:34,578 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:34,579 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:34,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 21:04:34,579 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1891895536, now seen corresponding path program 1 times [2022-03-18 21:04:34,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913984835] [2022-03-18 21:04:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:34,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:34,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:34,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913984835] [2022-03-18 21:04:34,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913984835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:34,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:34,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926187989] [2022-03-18 21:04:34,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:34,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:34,631 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:34,725 INFO L93 Difference]: Finished difference Result 91 states and 163 transitions. [2022-03-18 21:04:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:34,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-18 21:04:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:34,727 INFO L225 Difference]: With dead ends: 91 [2022-03-18 21:04:34,727 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 21:04:34,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:34,728 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:34,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 119 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:34,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 21:04:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-03-18 21:04:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 85 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 162 transitions. [2022-03-18 21:04:34,736 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 162 transitions. Word has length 24 [2022-03-18 21:04:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:34,736 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 162 transitions. [2022-03-18 21:04:34,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 162 transitions. [2022-03-18 21:04:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 21:04:34,737 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:34,737 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:34,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 21:04:34,738 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:34,738 INFO L85 PathProgramCache]: Analyzing trace with hash 127502905, now seen corresponding path program 1 times [2022-03-18 21:04:34,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:34,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194470772] [2022-03-18 21:04:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:34,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:34,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:34,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:34,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194470772] [2022-03-18 21:04:34,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194470772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:34,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:34,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:34,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827950320] [2022-03-18 21:04:34,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:34,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:34,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:34,782 INFO L87 Difference]: Start difference. First operand 89 states and 162 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) [2022-03-18 21:04:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:34,860 INFO L93 Difference]: Finished difference Result 94 states and 165 transitions. [2022-03-18 21:04:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:34,860 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 [2022-03-18 21:04:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:34,861 INFO L225 Difference]: With dead ends: 94 [2022-03-18 21:04:34,861 INFO L226 Difference]: Without dead ends: 94 [2022-03-18 21:04:34,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:34,862 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:34,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-18 21:04:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-03-18 21:04:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.8295454545454546) internal successors, (161), 88 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 164 transitions. [2022-03-18 21:04:34,869 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 164 transitions. Word has length 25 [2022-03-18 21:04:34,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:34,870 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 164 transitions. [2022-03-18 21:04:34,870 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) [2022-03-18 21:04:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 164 transitions. [2022-03-18 21:04:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 21:04:34,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:34,871 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:34,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 21:04:34,871 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1480812602, now seen corresponding path program 1 times [2022-03-18 21:04:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:34,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902675217] [2022-03-18 21:04:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:34,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:34,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:34,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902675217] [2022-03-18 21:04:34,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902675217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:34,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:34,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:34,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171562653] [2022-03-18 21:04:34,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:34,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:34,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:34,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:34,911 INFO L87 Difference]: Start difference. First operand 92 states and 164 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) [2022-03-18 21:04:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:34,985 INFO L93 Difference]: Finished difference Result 171 states and 310 transitions. [2022-03-18 21:04:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:34,986 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 [2022-03-18 21:04:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:34,987 INFO L225 Difference]: With dead ends: 171 [2022-03-18 21:04:34,987 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 21:04:34,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:34,988 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 212 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:34,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 21:04:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 121. [2022-03-18 21:04:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.829059829059829) internal successors, (214), 117 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 217 transitions. [2022-03-18 21:04:34,995 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 217 transitions. Word has length 25 [2022-03-18 21:04:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:34,996 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 217 transitions. [2022-03-18 21:04:34,996 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) [2022-03-18 21:04:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 217 transitions. [2022-03-18 21:04:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 21:04:34,997 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:34,997 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:34,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 21:04:34,997 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash 970278425, now seen corresponding path program 1 times [2022-03-18 21:04:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:34,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478472185] [2022-03-18 21:04:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:34,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:35,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:35,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478472185] [2022-03-18 21:04:35,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478472185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:35,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:35,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:35,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363283780] [2022-03-18 21:04:35,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:35,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:35,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:35,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:35,038 INFO L87 Difference]: Start difference. First operand 121 states and 217 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) [2022-03-18 21:04:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:35,125 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2022-03-18 21:04:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:35,126 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 [2022-03-18 21:04:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:35,127 INFO L225 Difference]: With dead ends: 173 [2022-03-18 21:04:35,127 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 21:04:35,127 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:35,128 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:35,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 121 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 21:04:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-03-18 21:04:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.8203592814371257) internal successors, (304), 167 states have internal predecessors, (304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 307 transitions. [2022-03-18 21:04:35,138 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 307 transitions. Word has length 25 [2022-03-18 21:04:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:35,138 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 307 transitions. [2022-03-18 21:04:35,138 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) [2022-03-18 21:04:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 307 transitions. [2022-03-18 21:04:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 21:04:35,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:35,139 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:35,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 21:04:35,140 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1339417396, now seen corresponding path program 1 times [2022-03-18 21:04:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:35,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034878539] [2022-03-18 21:04:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:35,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:35,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:35,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034878539] [2022-03-18 21:04:35,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034878539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:35,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:35,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:35,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366741415] [2022-03-18 21:04:35,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:35,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:35,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:35,199 INFO L87 Difference]: Start difference. First operand 171 states and 307 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) [2022-03-18 21:04:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:35,304 INFO L93 Difference]: Finished difference Result 175 states and 308 transitions. [2022-03-18 21:04:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:35,305 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 [2022-03-18 21:04:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:35,308 INFO L225 Difference]: With dead ends: 175 [2022-03-18 21:04:35,308 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 21:04:35,308 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:35,312 INFO L912 BasicCegarLoop]: 133 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:35,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 140 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 21:04:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-03-18 21:04:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.7988165680473374) internal successors, (304), 169 states have internal predecessors, (304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 307 transitions. [2022-03-18 21:04:35,322 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 307 transitions. Word has length 26 [2022-03-18 21:04:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:35,322 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 307 transitions. [2022-03-18 21:04:35,322 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) [2022-03-18 21:04:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 307 transitions. [2022-03-18 21:04:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 21:04:35,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:35,323 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:35,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 21:04:35,323 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash 13892301, now seen corresponding path program 1 times [2022-03-18 21:04:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:35,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62816200] [2022-03-18 21:04:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:35,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62816200] [2022-03-18 21:04:35,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62816200] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:35,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:35,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:35,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433412554] [2022-03-18 21:04:35,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:35,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:35,382 INFO L87 Difference]: Start difference. First operand 173 states and 307 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) [2022-03-18 21:04:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:35,470 INFO L93 Difference]: Finished difference Result 331 states and 584 transitions. [2022-03-18 21:04:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:35,470 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 [2022-03-18 21:04:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:35,472 INFO L225 Difference]: With dead ends: 331 [2022-03-18 21:04:35,472 INFO L226 Difference]: Without dead ends: 331 [2022-03-18 21:04:35,472 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:35,474 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 209 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:35,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 98 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-18 21:04:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2022-03-18 21:04:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.7846153846153847) internal successors, (580), 325 states have internal predecessors, (580), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 583 transitions. [2022-03-18 21:04:35,497 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 583 transitions. Word has length 26 [2022-03-18 21:04:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:35,497 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 583 transitions. [2022-03-18 21:04:35,497 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) [2022-03-18 21:04:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 583 transitions. [2022-03-18 21:04:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 21:04:35,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:35,500 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:35,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 21:04:35,500 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash 524426478, now seen corresponding path program 1 times [2022-03-18 21:04:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:35,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353865306] [2022-03-18 21:04:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353865306] [2022-03-18 21:04:35,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353865306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:35,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:35,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:35,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765025689] [2022-03-18 21:04:35,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:35,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:35,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:35,572 INFO L87 Difference]: Start difference. First operand 329 states and 583 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) [2022-03-18 21:04:35,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:35,638 INFO L93 Difference]: Finished difference Result 419 states and 748 transitions. [2022-03-18 21:04:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:35,639 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 [2022-03-18 21:04:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:35,640 INFO L225 Difference]: With dead ends: 419 [2022-03-18 21:04:35,641 INFO L226 Difference]: Without dead ends: 419 [2022-03-18 21:04:35,641 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:35,641 INFO L912 BasicCegarLoop]: 153 mSDtfsCounter, 135 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:35,642 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-18 21:04:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 329. [2022-03-18 21:04:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.7723076923076924) internal successors, (576), 325 states have internal predecessors, (576), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 579 transitions. [2022-03-18 21:04:35,648 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 579 transitions. Word has length 26 [2022-03-18 21:04:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:35,648 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 579 transitions. [2022-03-18 21:04:35,648 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) [2022-03-18 21:04:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 579 transitions. [2022-03-18 21:04:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 21:04:35,649 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:35,649 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:35,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 21:04:35,649 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash 430693653, now seen corresponding path program 1 times [2022-03-18 21:04:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:35,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793436803] [2022-03-18 21:04:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:35,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:35,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793436803] [2022-03-18 21:04:35,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793436803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:35,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:35,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:35,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044844788] [2022-03-18 21:04:35,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:35,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:35,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:35,679 INFO L87 Difference]: Start difference. First operand 329 states and 579 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) [2022-03-18 21:04:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:35,746 INFO L93 Difference]: Finished difference Result 615 states and 1092 transitions. [2022-03-18 21:04:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:35,746 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 [2022-03-18 21:04:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:35,748 INFO L225 Difference]: With dead ends: 615 [2022-03-18 21:04:35,748 INFO L226 Difference]: Without dead ends: 615 [2022-03-18 21:04:35,749 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:35,749 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 198 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:35,749 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-03-18 21:04:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 453. [2022-03-18 21:04:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 449 states have (on average 1.7461024498886415) internal successors, (784), 449 states have internal predecessors, (784), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 787 transitions. [2022-03-18 21:04:35,758 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 787 transitions. Word has length 27 [2022-03-18 21:04:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:35,758 INFO L478 AbstractCegarLoop]: Abstraction has 453 states and 787 transitions. [2022-03-18 21:04:35,758 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) [2022-03-18 21:04:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 787 transitions. [2022-03-18 21:04:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 21:04:35,759 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:35,759 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:35,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 21:04:35,760 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash -79840524, now seen corresponding path program 1 times [2022-03-18 21:04:35,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:35,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203545135] [2022-03-18 21:04:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:35,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:35,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:35,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203545135] [2022-03-18 21:04:35,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203545135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:35,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:35,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:35,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482814367] [2022-03-18 21:04:35,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:35,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:35,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:35,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:35,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:35,787 INFO L87 Difference]: Start difference. First operand 453 states and 787 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) [2022-03-18 21:04:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:35,855 INFO L93 Difference]: Finished difference Result 639 states and 1104 transitions. [2022-03-18 21:04:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:35,855 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 [2022-03-18 21:04:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:35,857 INFO L225 Difference]: With dead ends: 639 [2022-03-18 21:04:35,857 INFO L226 Difference]: Without dead ends: 639 [2022-03-18 21:04:35,858 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:35,858 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:35,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 125 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-03-18 21:04:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2022-03-18 21:04:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 633 states have (on average 1.7377567140600316) internal successors, (1100), 633 states have internal predecessors, (1100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1103 transitions. [2022-03-18 21:04:35,867 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1103 transitions. Word has length 27 [2022-03-18 21:04:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:35,868 INFO L478 AbstractCegarLoop]: Abstraction has 637 states and 1103 transitions. [2022-03-18 21:04:35,868 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) [2022-03-18 21:04:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1103 transitions. [2022-03-18 21:04:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 21:04:35,869 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:35,869 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:35,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 21:04:35,869 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:35,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:35,869 INFO L85 PathProgramCache]: Analyzing trace with hash 466633801, now seen corresponding path program 1 times [2022-03-18 21:04:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:35,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617851576] [2022-03-18 21:04:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:35,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617851576] [2022-03-18 21:04:35,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617851576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:35,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:35,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:35,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464219532] [2022-03-18 21:04:35,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:35,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:35,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:35,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:35,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:35,894 INFO L87 Difference]: Start difference. First operand 637 states and 1103 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) [2022-03-18 21:04:35,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:35,961 INFO L93 Difference]: Finished difference Result 651 states and 1112 transitions. [2022-03-18 21:04:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:35,961 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 [2022-03-18 21:04:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:35,963 INFO L225 Difference]: With dead ends: 651 [2022-03-18 21:04:35,963 INFO L226 Difference]: Without dead ends: 651 [2022-03-18 21:04:35,964 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:35,964 INFO L912 BasicCegarLoop]: 127 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:35,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 134 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-18 21:04:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2022-03-18 21:04:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 645 states have (on average 1.7178294573643411) internal successors, (1108), 645 states have internal predecessors, (1108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1111 transitions. [2022-03-18 21:04:35,974 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1111 transitions. Word has length 28 [2022-03-18 21:04:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:35,974 INFO L478 AbstractCegarLoop]: Abstraction has 649 states and 1111 transitions. [2022-03-18 21:04:35,974 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) [2022-03-18 21:04:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1111 transitions. [2022-03-18 21:04:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 21:04:35,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:35,975 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:35,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 21:04:35,975 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1819943498, now seen corresponding path program 1 times [2022-03-18 21:04:35,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:35,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656437195] [2022-03-18 21:04:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:35,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:35,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:36,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:36,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656437195] [2022-03-18 21:04:36,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656437195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:36,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:36,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:36,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103053978] [2022-03-18 21:04:36,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:36,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:36,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:36,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:36,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:36,002 INFO L87 Difference]: Start difference. First operand 649 states and 1111 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) [2022-03-18 21:04:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:36,079 INFO L93 Difference]: Finished difference Result 1195 states and 2064 transitions. [2022-03-18 21:04:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:36,079 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 [2022-03-18 21:04:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:36,083 INFO L225 Difference]: With dead ends: 1195 [2022-03-18 21:04:36,083 INFO L226 Difference]: Without dead ends: 1195 [2022-03-18 21:04:36,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:36,084 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:36,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-03-18 21:04:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-03-18 21:04:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 901 states have (on average 1.6825749167591566) internal successors, (1516), 901 states have internal predecessors, (1516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1519 transitions. [2022-03-18 21:04:36,100 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1519 transitions. Word has length 28 [2022-03-18 21:04:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:36,100 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1519 transitions. [2022-03-18 21:04:36,100 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) [2022-03-18 21:04:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1519 transitions. [2022-03-18 21:04:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 21:04:36,101 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:36,101 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:36,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 21:04:36,101 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1309409321, now seen corresponding path program 1 times [2022-03-18 21:04:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:36,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579901350] [2022-03-18 21:04:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579901350] [2022-03-18 21:04:36,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579901350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:36,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:36,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:36,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376536431] [2022-03-18 21:04:36,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:36,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:36,140 INFO L87 Difference]: Start difference. First operand 905 states and 1519 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) [2022-03-18 21:04:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:36,211 INFO L93 Difference]: Finished difference Result 1259 states and 2104 transitions. [2022-03-18 21:04:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:36,211 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 [2022-03-18 21:04:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:36,215 INFO L225 Difference]: With dead ends: 1259 [2022-03-18 21:04:36,215 INFO L226 Difference]: Without dead ends: 1259 [2022-03-18 21:04:36,215 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:36,216 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:36,216 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-03-18 21:04:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1257. [2022-03-18 21:04:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1253 states have (on average 1.675977653631285) internal successors, (2100), 1253 states have internal predecessors, (2100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2103 transitions. [2022-03-18 21:04:36,252 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2103 transitions. Word has length 28 [2022-03-18 21:04:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:36,253 INFO L478 AbstractCegarLoop]: Abstraction has 1257 states and 2103 transitions. [2022-03-18 21:04:36,254 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) [2022-03-18 21:04:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2103 transitions. [2022-03-18 21:04:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 21:04:36,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:36,255 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:36,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-18 21:04:36,255 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash 583706160, now seen corresponding path program 1 times [2022-03-18 21:04:36,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:36,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555678369] [2022-03-18 21:04:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:36,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:36,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555678369] [2022-03-18 21:04:36,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555678369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:36,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:36,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:36,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719115171] [2022-03-18 21:04:36,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:36,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:36,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:36,302 INFO L87 Difference]: Start difference. First operand 1257 states and 2103 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) [2022-03-18 21:04:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:36,370 INFO L93 Difference]: Finished difference Result 1275 states and 2104 transitions. [2022-03-18 21:04:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:36,370 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 [2022-03-18 21:04:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:36,373 INFO L225 Difference]: With dead ends: 1275 [2022-03-18 21:04:36,373 INFO L226 Difference]: Without dead ends: 1275 [2022-03-18 21:04:36,374 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:36,375 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 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 [2022-03-18 21:04:36,375 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-03-18 21:04:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-03-18 21:04:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1269 states have (on average 1.6548463356973995) internal successors, (2100), 1269 states have internal predecessors, (2100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2103 transitions. [2022-03-18 21:04:36,397 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2103 transitions. Word has length 29 [2022-03-18 21:04:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:36,397 INFO L478 AbstractCegarLoop]: Abstraction has 1273 states and 2103 transitions. [2022-03-18 21:04:36,397 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) [2022-03-18 21:04:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2103 transitions. [2022-03-18 21:04:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 21:04:36,399 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:36,399 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:36,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 21:04:36,399 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1937015857, now seen corresponding path program 1 times [2022-03-18 21:04:36,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:36,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274572279] [2022-03-18 21:04:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:36,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274572279] [2022-03-18 21:04:36,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274572279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:36,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:36,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:36,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9274918] [2022-03-18 21:04:36,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:36,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:36,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:36,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:36,433 INFO L87 Difference]: Start difference. First operand 1273 states and 2103 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) [2022-03-18 21:04:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:36,498 INFO L93 Difference]: Finished difference Result 2315 states and 3864 transitions. [2022-03-18 21:04:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:36,499 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 [2022-03-18 21:04:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:36,505 INFO L225 Difference]: With dead ends: 2315 [2022-03-18 21:04:36,505 INFO L226 Difference]: Without dead ends: 2315 [2022-03-18 21:04:36,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:36,507 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:36,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-03-18 21:04:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1801. [2022-03-18 21:04:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1797 states have (on average 1.613800779076238) internal successors, (2900), 1797 states have internal predecessors, (2900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2903 transitions. [2022-03-18 21:04:36,537 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2903 transitions. Word has length 29 [2022-03-18 21:04:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:36,537 INFO L478 AbstractCegarLoop]: Abstraction has 1801 states and 2903 transitions. [2022-03-18 21:04:36,537 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) [2022-03-18 21:04:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2903 transitions. [2022-03-18 21:04:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 21:04:36,539 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:36,539 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:36,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-18 21:04:36,540 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:36,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1426481680, now seen corresponding path program 1 times [2022-03-18 21:04:36,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:36,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961147023] [2022-03-18 21:04:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:36,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:36,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:36,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961147023] [2022-03-18 21:04:36,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961147023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:36,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:36,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710061422] [2022-03-18 21:04:36,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:36,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:36,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:36,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:36,577 INFO L87 Difference]: Start difference. First operand 1801 states and 2903 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) [2022-03-18 21:04:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:36,657 INFO L93 Difference]: Finished difference Result 2475 states and 3976 transitions. [2022-03-18 21:04:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:36,658 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 [2022-03-18 21:04:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:36,664 INFO L225 Difference]: With dead ends: 2475 [2022-03-18 21:04:36,665 INFO L226 Difference]: Without dead ends: 2475 [2022-03-18 21:04:36,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:36,665 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:36,666 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-03-18 21:04:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2473. [2022-03-18 21:04:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2469 states have (on average 1.608748481166464) internal successors, (3972), 2469 states have internal predecessors, (3972), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3975 transitions. [2022-03-18 21:04:36,710 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3975 transitions. Word has length 29 [2022-03-18 21:04:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:36,710 INFO L478 AbstractCegarLoop]: Abstraction has 2473 states and 3975 transitions. [2022-03-18 21:04:36,710 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) [2022-03-18 21:04:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3975 transitions. [2022-03-18 21:04:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 21:04:36,713 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:36,713 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:36,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-18 21:04:36,714 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash -82017883, now seen corresponding path program 1 times [2022-03-18 21:04:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:36,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352881935] [2022-03-18 21:04:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:36,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352881935] [2022-03-18 21:04:36,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352881935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:36,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:36,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:36,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010457076] [2022-03-18 21:04:36,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:36,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:36,757 INFO L87 Difference]: Start difference. First operand 2473 states and 3975 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) [2022-03-18 21:04:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:36,827 INFO L93 Difference]: Finished difference Result 2507 states and 3976 transitions. [2022-03-18 21:04:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:36,827 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 [2022-03-18 21:04:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:36,833 INFO L225 Difference]: With dead ends: 2507 [2022-03-18 21:04:36,834 INFO L226 Difference]: Without dead ends: 2507 [2022-03-18 21:04:36,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:36,835 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 128 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 [2022-03-18 21:04:36,836 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 128 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-03-18 21:04:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2505. [2022-03-18 21:04:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2501 states have (on average 1.5881647341063574) internal successors, (3972), 2501 states have internal predecessors, (3972), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3975 transitions. [2022-03-18 21:04:36,901 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3975 transitions. Word has length 30 [2022-03-18 21:04:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:36,901 INFO L478 AbstractCegarLoop]: Abstraction has 2505 states and 3975 transitions. [2022-03-18 21:04:36,901 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) [2022-03-18 21:04:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3975 transitions. [2022-03-18 21:04:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 21:04:36,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:36,904 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:36,904 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-18 21:04:36,904 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:36,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:36,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1271291814, now seen corresponding path program 1 times [2022-03-18 21:04:36,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:36,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670731083] [2022-03-18 21:04:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:36,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:36,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670731083] [2022-03-18 21:04:36,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670731083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:36,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:36,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:36,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132501434] [2022-03-18 21:04:36,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:36,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:36,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:36,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:36,945 INFO L87 Difference]: Start difference. First operand 2505 states and 3975 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) [2022-03-18 21:04:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:37,017 INFO L93 Difference]: Finished difference Result 4491 states and 7208 transitions. [2022-03-18 21:04:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:37,017 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 [2022-03-18 21:04:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:37,029 INFO L225 Difference]: With dead ends: 4491 [2022-03-18 21:04:37,029 INFO L226 Difference]: Without dead ends: 4491 [2022-03-18 21:04:37,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:37,030 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:37,030 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-03-18 21:04:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 3593. [2022-03-18 21:04:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3589 states have (on average 1.5436054611312344) internal successors, (5540), 3589 states have internal predecessors, (5540), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5543 transitions. [2022-03-18 21:04:37,086 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5543 transitions. Word has length 30 [2022-03-18 21:04:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:37,086 INFO L478 AbstractCegarLoop]: Abstraction has 3593 states and 5543 transitions. [2022-03-18 21:04:37,086 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) [2022-03-18 21:04:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5543 transitions. [2022-03-18 21:04:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 21:04:37,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:37,090 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:37,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-18 21:04:37,090 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash 760757637, now seen corresponding path program 1 times [2022-03-18 21:04:37,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:37,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133163057] [2022-03-18 21:04:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:37,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:37,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:37,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133163057] [2022-03-18 21:04:37,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133163057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:37,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:37,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964496006] [2022-03-18 21:04:37,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:37,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:37,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:37,112 INFO L87 Difference]: Start difference. First operand 3593 states and 5543 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) [2022-03-18 21:04:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:37,181 INFO L93 Difference]: Finished difference Result 4875 states and 7496 transitions. [2022-03-18 21:04:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:37,181 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 [2022-03-18 21:04:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:37,194 INFO L225 Difference]: With dead ends: 4875 [2022-03-18 21:04:37,194 INFO L226 Difference]: Without dead ends: 4875 [2022-03-18 21:04:37,194 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:37,195 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 131 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 [2022-03-18 21:04:37,195 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-18 21:04:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4873. [2022-03-18 21:04:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 4869 states have (on average 1.538714315054426) internal successors, (7492), 4869 states have internal predecessors, (7492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7495 transitions. [2022-03-18 21:04:37,257 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7495 transitions. Word has length 30 [2022-03-18 21:04:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:37,258 INFO L478 AbstractCegarLoop]: Abstraction has 4873 states and 7495 transitions. [2022-03-18 21:04:37,258 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) [2022-03-18 21:04:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7495 transitions. [2022-03-18 21:04:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 21:04:37,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:37,262 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:37,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-18 21:04:37,262 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:37,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 755373388, now seen corresponding path program 1 times [2022-03-18 21:04:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187940456] [2022-03-18 21:04:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:37,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:37,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187940456] [2022-03-18 21:04:37,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187940456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:37,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:37,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:37,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750941138] [2022-03-18 21:04:37,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:37,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:37,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:37,283 INFO L87 Difference]: Start difference. First operand 4873 states and 7495 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) [2022-03-18 21:04:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:37,361 INFO L93 Difference]: Finished difference Result 4939 states and 7496 transitions. [2022-03-18 21:04:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:37,362 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 [2022-03-18 21:04:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:37,395 INFO L225 Difference]: With dead ends: 4939 [2022-03-18 21:04:37,396 INFO L226 Difference]: Without dead ends: 4939 [2022-03-18 21:04:37,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:37,396 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 164 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 125 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 [2022-03-18 21:04:37,397 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 125 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2022-03-18 21:04:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4937. [2022-03-18 21:04:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4933 states have (on average 1.5187512669774985) internal successors, (7492), 4933 states have internal predecessors, (7492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 7495 transitions. [2022-03-18 21:04:37,462 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 7495 transitions. Word has length 31 [2022-03-18 21:04:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:37,462 INFO L478 AbstractCegarLoop]: Abstraction has 4937 states and 7495 transitions. [2022-03-18 21:04:37,462 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) [2022-03-18 21:04:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 7495 transitions. [2022-03-18 21:04:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 21:04:37,466 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:37,466 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:37,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-18 21:04:37,467 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:37,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:37,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2108683085, now seen corresponding path program 1 times [2022-03-18 21:04:37,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:37,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432009687] [2022-03-18 21:04:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:37,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:37,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432009687] [2022-03-18 21:04:37,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432009687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:37,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:37,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:37,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559083424] [2022-03-18 21:04:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:37,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:37,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:37,490 INFO L87 Difference]: Start difference. First operand 4937 states and 7495 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) [2022-03-18 21:04:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:37,572 INFO L93 Difference]: Finished difference Result 8715 states and 13384 transitions. [2022-03-18 21:04:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:37,573 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 [2022-03-18 21:04:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:37,586 INFO L225 Difference]: With dead ends: 8715 [2022-03-18 21:04:37,586 INFO L226 Difference]: Without dead ends: 8715 [2022-03-18 21:04:37,586 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:37,587 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 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 [2022-03-18 21:04:37,587 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8715 states. [2022-03-18 21:04:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8715 to 7177. [2022-03-18 21:04:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7173 states have (on average 1.4727450160323434) internal successors, (10564), 7173 states have internal predecessors, (10564), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10567 transitions. [2022-03-18 21:04:37,679 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10567 transitions. Word has length 31 [2022-03-18 21:04:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:37,679 INFO L478 AbstractCegarLoop]: Abstraction has 7177 states and 10567 transitions. [2022-03-18 21:04:37,679 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) [2022-03-18 21:04:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10567 transitions. [2022-03-18 21:04:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 21:04:37,686 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:37,686 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:37,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-18 21:04:37,687 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1598148908, now seen corresponding path program 1 times [2022-03-18 21:04:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:37,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411791987] [2022-03-18 21:04:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:37,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:37,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:37,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411791987] [2022-03-18 21:04:37,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411791987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:37,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:37,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:37,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875015933] [2022-03-18 21:04:37,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:37,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:37,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:37,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:37,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:37,708 INFO L87 Difference]: Start difference. First operand 7177 states and 10567 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) [2022-03-18 21:04:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:37,785 INFO L93 Difference]: Finished difference Result 9611 states and 14088 transitions. [2022-03-18 21:04:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:37,785 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 [2022-03-18 21:04:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:37,798 INFO L225 Difference]: With dead ends: 9611 [2022-03-18 21:04:37,798 INFO L226 Difference]: Without dead ends: 9611 [2022-03-18 21:04:37,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:37,799 INFO L912 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 133 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 [2022-03-18 21:04:37,799 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 133 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2022-03-18 21:04:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9609. [2022-03-18 21:04:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9609 states, 9605 states have (on average 1.4663196251952109) internal successors, (14084), 9605 states have internal predecessors, (14084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9609 states to 9609 states and 14087 transitions. [2022-03-18 21:04:37,948 INFO L78 Accepts]: Start accepts. Automaton has 9609 states and 14087 transitions. Word has length 31 [2022-03-18 21:04:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:37,948 INFO L478 AbstractCegarLoop]: Abstraction has 9609 states and 14087 transitions. [2022-03-18 21:04:37,948 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) [2022-03-18 21:04:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 9609 states and 14087 transitions. [2022-03-18 21:04:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 21:04:37,955 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:37,956 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:37,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-18 21:04:37,956 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:37,956 INFO L85 PathProgramCache]: Analyzing trace with hash 944699137, now seen corresponding path program 1 times [2022-03-18 21:04:37,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:37,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323503062] [2022-03-18 21:04:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:37,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:37,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323503062] [2022-03-18 21:04:37,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323503062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:37,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:37,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:37,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14323951] [2022-03-18 21:04:37,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:37,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:37,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:37,976 INFO L87 Difference]: Start difference. First operand 9609 states and 14087 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) [2022-03-18 21:04:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:38,053 INFO L93 Difference]: Finished difference Result 9739 states and 14088 transitions. [2022-03-18 21:04:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:38,054 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 [2022-03-18 21:04:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:38,067 INFO L225 Difference]: With dead ends: 9739 [2022-03-18 21:04:38,067 INFO L226 Difference]: Without dead ends: 9739 [2022-03-18 21:04:38,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:38,068 INFO L912 BasicCegarLoop]: 115 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:38,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 122 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2022-03-18 21:04:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9737. [2022-03-18 21:04:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9733 states have (on average 1.4470358573923765) internal successors, (14084), 9733 states have internal predecessors, (14084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 14087 transitions. [2022-03-18 21:04:38,177 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 14087 transitions. Word has length 32 [2022-03-18 21:04:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:38,177 INFO L478 AbstractCegarLoop]: Abstraction has 9737 states and 14087 transitions. [2022-03-18 21:04:38,177 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) [2022-03-18 21:04:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 14087 transitions. [2022-03-18 21:04:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 21:04:38,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:38,185 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:38,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-18 21:04:38,185 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:38,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1996958462, now seen corresponding path program 1 times [2022-03-18 21:04:38,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:38,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721952693] [2022-03-18 21:04:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:38,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:38,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:38,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721952693] [2022-03-18 21:04:38,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721952693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:38,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:38,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:38,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174236126] [2022-03-18 21:04:38,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:38,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:38,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:38,205 INFO L87 Difference]: Start difference. First operand 9737 states and 14087 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) [2022-03-18 21:04:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:38,331 INFO L93 Difference]: Finished difference Result 16907 states and 24712 transitions. [2022-03-18 21:04:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:38,331 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 [2022-03-18 21:04:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:38,354 INFO L225 Difference]: With dead ends: 16907 [2022-03-18 21:04:38,355 INFO L226 Difference]: Without dead ends: 16907 [2022-03-18 21:04:38,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:38,355 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 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 [2022-03-18 21:04:38,355 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16907 states. [2022-03-18 21:04:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16907 to 14345. [2022-03-18 21:04:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.4015759012621156) internal successors, (20100), 14341 states have internal predecessors, (20100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 20103 transitions. [2022-03-18 21:04:38,522 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 20103 transitions. Word has length 32 [2022-03-18 21:04:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:38,522 INFO L478 AbstractCegarLoop]: Abstraction has 14345 states and 20103 transitions. [2022-03-18 21:04:38,522 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) [2022-03-18 21:04:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 20103 transitions. [2022-03-18 21:04:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 21:04:38,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:38,538 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:38,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-18 21:04:38,539 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1787474657, now seen corresponding path program 1 times [2022-03-18 21:04:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:38,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777398667] [2022-03-18 21:04:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:38,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:38,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:38,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777398667] [2022-03-18 21:04:38,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777398667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:38,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:38,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:38,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132168156] [2022-03-18 21:04:38,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:38,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:38,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:38,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:38,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:38,562 INFO L87 Difference]: Start difference. First operand 14345 states and 20103 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) [2022-03-18 21:04:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:38,718 INFO L93 Difference]: Finished difference Result 18955 states and 26376 transitions. [2022-03-18 21:04:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:38,718 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 [2022-03-18 21:04:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:38,746 INFO L225 Difference]: With dead ends: 18955 [2022-03-18 21:04:38,746 INFO L226 Difference]: Without dead ends: 18955 [2022-03-18 21:04:38,746 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:38,747 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 135 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 [2022-03-18 21:04:38,747 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 135 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:38,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18955 states. [2022-03-18 21:04:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18955 to 18953. [2022-03-18 21:04:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18953 states, 18949 states have (on average 1.3917357116470526) internal successors, (26372), 18949 states have internal predecessors, (26372), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18953 states to 18953 states and 26375 transitions. [2022-03-18 21:04:39,014 INFO L78 Accepts]: Start accepts. Automaton has 18953 states and 26375 transitions. Word has length 32 [2022-03-18 21:04:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:39,015 INFO L478 AbstractCegarLoop]: Abstraction has 18953 states and 26375 transitions. [2022-03-18 21:04:39,015 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) [2022-03-18 21:04:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 18953 states and 26375 transitions. [2022-03-18 21:04:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 21:04:39,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:39,031 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:39,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-18 21:04:39,032 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1776137112, now seen corresponding path program 1 times [2022-03-18 21:04:39,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:39,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273194688] [2022-03-18 21:04:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:39,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:39,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:39,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273194688] [2022-03-18 21:04:39,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273194688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:39,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:39,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:39,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78643593] [2022-03-18 21:04:39,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:39,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:39,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:39,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:39,093 INFO L87 Difference]: Start difference. First operand 18953 states and 26375 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) [2022-03-18 21:04:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:39,211 INFO L93 Difference]: Finished difference Result 19211 states and 26376 transitions. [2022-03-18 21:04:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:39,212 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 [2022-03-18 21:04:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:39,241 INFO L225 Difference]: With dead ends: 19211 [2022-03-18 21:04:39,242 INFO L226 Difference]: Without dead ends: 19211 [2022-03-18 21:04:39,242 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:39,242 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 162 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 119 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 [2022-03-18 21:04:39,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19211 states. [2022-03-18 21:04:39,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19211 to 19209. [2022-03-18 21:04:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19209 states, 19205 states have (on average 1.37318406664931) internal successors, (26372), 19205 states have internal predecessors, (26372), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19209 states to 19209 states and 26375 transitions. [2022-03-18 21:04:39,635 INFO L78 Accepts]: Start accepts. Automaton has 19209 states and 26375 transitions. Word has length 33 [2022-03-18 21:04:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:39,635 INFO L478 AbstractCegarLoop]: Abstraction has 19209 states and 26375 transitions. [2022-03-18 21:04:39,635 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) [2022-03-18 21:04:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 19209 states and 26375 transitions. [2022-03-18 21:04:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 21:04:39,651 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:39,651 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:39,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-18 21:04:39,651 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash -422827415, now seen corresponding path program 1 times [2022-03-18 21:04:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:39,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809947873] [2022-03-18 21:04:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:39,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:39,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809947873] [2022-03-18 21:04:39,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809947873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:39,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:39,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:39,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785928418] [2022-03-18 21:04:39,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:39,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:39,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:39,671 INFO L87 Difference]: Start difference. First operand 19209 states and 26375 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) [2022-03-18 21:04:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:39,863 INFO L93 Difference]: Finished difference Result 32779 states and 45320 transitions. [2022-03-18 21:04:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:39,875 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 [2022-03-18 21:04:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:39,909 INFO L225 Difference]: With dead ends: 32779 [2022-03-18 21:04:39,909 INFO L226 Difference]: Without dead ends: 32779 [2022-03-18 21:04:39,910 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:39,911 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 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 [2022-03-18 21:04:39,912 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32779 states. [2022-03-18 21:04:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32779 to 28681. [2022-03-18 21:04:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28681 states, 28677 states have (on average 1.3302646720368239) internal successors, (38148), 28677 states have internal predecessors, (38148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28681 states to 28681 states and 38151 transitions. [2022-03-18 21:04:40,305 INFO L78 Accepts]: Start accepts. Automaton has 28681 states and 38151 transitions. Word has length 33 [2022-03-18 21:04:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:40,305 INFO L478 AbstractCegarLoop]: Abstraction has 28681 states and 38151 transitions. [2022-03-18 21:04:40,305 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) [2022-03-18 21:04:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 28681 states and 38151 transitions. [2022-03-18 21:04:40,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 21:04:40,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:40,323 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:40,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-18 21:04:40,324 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash -933361592, now seen corresponding path program 1 times [2022-03-18 21:04:40,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:40,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838038046] [2022-03-18 21:04:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:40,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:40,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838038046] [2022-03-18 21:04:40,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838038046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:40,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:40,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:40,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514527867] [2022-03-18 21:04:40,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:40,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:40,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:40,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:40,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:40,342 INFO L87 Difference]: Start difference. First operand 28681 states and 38151 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) [2022-03-18 21:04:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:40,604 INFO L93 Difference]: Finished difference Result 37387 states and 49160 transitions. [2022-03-18 21:04:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:40,605 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 [2022-03-18 21:04:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:40,646 INFO L225 Difference]: With dead ends: 37387 [2022-03-18 21:04:40,646 INFO L226 Difference]: Without dead ends: 37387 [2022-03-18 21:04:40,647 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:40,647 INFO L912 BasicCegarLoop]: 130 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:40,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 137 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-03-18 21:04:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 37385. [2022-03-18 21:04:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37381 states have (on average 1.3149995987266259) internal successors, (49156), 37381 states have internal predecessors, (49156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 49159 transitions. [2022-03-18 21:04:41,057 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 49159 transitions. Word has length 33 [2022-03-18 21:04:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:41,057 INFO L478 AbstractCegarLoop]: Abstraction has 37385 states and 49159 transitions. [2022-03-18 21:04:41,057 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) [2022-03-18 21:04:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 49159 transitions. [2022-03-18 21:04:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 21:04:41,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:41,073 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:41,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-18 21:04:41,074 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash -222714787, now seen corresponding path program 1 times [2022-03-18 21:04:41,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:41,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270456497] [2022-03-18 21:04:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:41,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:41,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:41,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:41,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270456497] [2022-03-18 21:04:41,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270456497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:41,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:41,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386399463] [2022-03-18 21:04:41,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:41,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:41,092 INFO L87 Difference]: Start difference. First operand 37385 states and 49159 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) [2022-03-18 21:04:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:41,319 INFO L93 Difference]: Finished difference Result 37899 states and 49160 transitions. [2022-03-18 21:04:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:41,319 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 [2022-03-18 21:04:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:41,359 INFO L225 Difference]: With dead ends: 37899 [2022-03-18 21:04:41,360 INFO L226 Difference]: Without dead ends: 37899 [2022-03-18 21:04:41,360 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:41,360 INFO L912 BasicCegarLoop]: 109 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 116 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 [2022-03-18 21:04:41,360 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 116 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37899 states. [2022-03-18 21:04:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37899 to 37897. [2022-03-18 21:04:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37897 states, 37893 states have (on average 1.2972316786741616) internal successors, (49156), 37893 states have internal predecessors, (49156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37897 states to 37897 states and 49159 transitions. [2022-03-18 21:04:41,884 INFO L78 Accepts]: Start accepts. Automaton has 37897 states and 49159 transitions. Word has length 34 [2022-03-18 21:04:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:41,884 INFO L478 AbstractCegarLoop]: Abstraction has 37897 states and 49159 transitions. [2022-03-18 21:04:41,884 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) [2022-03-18 21:04:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 37897 states and 49159 transitions. [2022-03-18 21:04:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 21:04:41,900 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:41,900 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:41,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-18 21:04:41,901 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:41,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1130594910, now seen corresponding path program 1 times [2022-03-18 21:04:41,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:41,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715510759] [2022-03-18 21:04:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:41,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:41,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:41,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:41,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715510759] [2022-03-18 21:04:41,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715510759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:41,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:41,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:41,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342471384] [2022-03-18 21:04:41,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:41,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:41,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:41,921 INFO L87 Difference]: Start difference. First operand 37897 states and 49159 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) [2022-03-18 21:04:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:42,154 INFO L93 Difference]: Finished difference Result 73739 states and 92168 transitions. [2022-03-18 21:04:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:42,154 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 [2022-03-18 21:04:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:42,258 INFO L225 Difference]: With dead ends: 73739 [2022-03-18 21:04:42,258 INFO L226 Difference]: Without dead ends: 73739 [2022-03-18 21:04:42,259 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:42,259 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 106 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 [2022-03-18 21:04:42,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 106 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:42,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73739 states. [2022-03-18 21:04:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73739 to 73737. [2022-03-18 21:04:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73737 states, 73733 states have (on average 1.2499694844913403) internal successors, (92164), 73733 states have internal predecessors, (92164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73737 states to 73737 states and 92167 transitions. [2022-03-18 21:04:43,254 INFO L78 Accepts]: Start accepts. Automaton has 73737 states and 92167 transitions. Word has length 34 [2022-03-18 21:04:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:43,254 INFO L478 AbstractCegarLoop]: Abstraction has 73737 states and 92167 transitions. [2022-03-18 21:04:43,254 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) [2022-03-18 21:04:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 73737 states and 92167 transitions. [2022-03-18 21:04:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 21:04:43,303 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:43,303 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:43,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-18 21:04:43,303 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:43,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1641129087, now seen corresponding path program 1 times [2022-03-18 21:04:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:43,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810913489] [2022-03-18 21:04:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:43,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:43,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810913489] [2022-03-18 21:04:43,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810913489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:43,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:43,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:43,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908376106] [2022-03-18 21:04:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:43,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:43,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:43,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:43,341 INFO L87 Difference]: Start difference. First operand 73737 states and 92167 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) [2022-03-18 21:04:43,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:43,796 INFO L93 Difference]: Finished difference Result 79883 states and 101384 transitions. [2022-03-18 21:04:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:43,797 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 [2022-03-18 21:04:43,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:43,879 INFO L225 Difference]: With dead ends: 79883 [2022-03-18 21:04:43,879 INFO L226 Difference]: Without dead ends: 79883 [2022-03-18 21:04:43,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:43,880 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 103 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 128 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 [2022-03-18 21:04:43,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 128 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-03-18 21:04:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 73737. [2022-03-18 21:04:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73737 states, 73733 states have (on average 1.2360815374391385) internal successors, (91140), 73733 states have internal predecessors, (91140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73737 states to 73737 states and 91143 transitions. [2022-03-18 21:04:44,778 INFO L78 Accepts]: Start accepts. Automaton has 73737 states and 91143 transitions. Word has length 34 [2022-03-18 21:04:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:44,778 INFO L478 AbstractCegarLoop]: Abstraction has 73737 states and 91143 transitions. [2022-03-18 21:04:44,778 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) [2022-03-18 21:04:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 73737 states and 91143 transitions. [2022-03-18 21:04:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 21:04:44,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:44,810 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:44,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-18 21:04:44,811 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash 688737156, now seen corresponding path program 1 times [2022-03-18 21:04:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:44,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432771035] [2022-03-18 21:04:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:44,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:44,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:44,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:44,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432771035] [2022-03-18 21:04:44,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432771035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:44,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:44,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874462729] [2022-03-18 21:04:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:44,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:44,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:44,832 INFO L87 Difference]: Start difference. First operand 73737 states and 91143 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:45,315 INFO L93 Difference]: Finished difference Result 121867 states and 149512 transitions. [2022-03-18 21:04:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2022-03-18 21:04:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:45,524 INFO L225 Difference]: With dead ends: 121867 [2022-03-18 21:04:45,525 INFO L226 Difference]: Without dead ends: 121867 [2022-03-18 21:04:45,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:45,526 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 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 [2022-03-18 21:04:45,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121867 states. [2022-03-18 21:04:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121867 to 113673. [2022-03-18 21:04:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113673 states, 113669 states have (on average 1.2071892952344088) internal successors, (137220), 113669 states have internal predecessors, (137220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113673 states to 113673 states and 137223 transitions. [2022-03-18 21:04:47,126 INFO L78 Accepts]: Start accepts. Automaton has 113673 states and 137223 transitions. Word has length 35 [2022-03-18 21:04:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:47,126 INFO L478 AbstractCegarLoop]: Abstraction has 113673 states and 137223 transitions. [2022-03-18 21:04:47,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 113673 states and 137223 transitions. [2022-03-18 21:04:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 21:04:47,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:47,203 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:47,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-18 21:04:47,203 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash 178202979, now seen corresponding path program 1 times [2022-03-18 21:04:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:47,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918868485] [2022-03-18 21:04:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:47,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:47,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:47,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918868485] [2022-03-18 21:04:47,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918868485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:47,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:47,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:47,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989992425] [2022-03-18 21:04:47,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:47,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:47,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:47,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:47,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:47,227 INFO L87 Difference]: Start difference. First operand 113673 states and 137223 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:47,827 INFO L93 Difference]: Finished difference Result 144395 states and 169992 transitions. [2022-03-18 21:04:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2022-03-18 21:04:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:48,004 INFO L225 Difference]: With dead ends: 144395 [2022-03-18 21:04:48,004 INFO L226 Difference]: Without dead ends: 144395 [2022-03-18 21:04:48,004 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:48,004 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 141 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 [2022-03-18 21:04:48,005 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 141 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144395 states. [2022-03-18 21:04:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144395 to 144393. [2022-03-18 21:04:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144393 states, 144389 states have (on average 1.1772918989673729) internal successors, (169988), 144389 states have internal predecessors, (169988), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144393 states to 144393 states and 169991 transitions. [2022-03-18 21:04:50,080 INFO L78 Accepts]: Start accepts. Automaton has 144393 states and 169991 transitions. Word has length 35 [2022-03-18 21:04:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:50,080 INFO L478 AbstractCegarLoop]: Abstraction has 144393 states and 169991 transitions. [2022-03-18 21:04:50,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 144393 states and 169991 transitions. [2022-03-18 21:04:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 21:04:50,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:50,224 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:50,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-18 21:04:50,225 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash -123951206, now seen corresponding path program 1 times [2022-03-18 21:04:50,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:50,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579903635] [2022-03-18 21:04:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:50,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:50,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:50,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579903635] [2022-03-18 21:04:50,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579903635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:50,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:50,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:50,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726530243] [2022-03-18 21:04:50,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:50,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:50,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:50,264 INFO L87 Difference]: Start difference. First operand 144393 states and 169991 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:50,594 INFO L93 Difference]: Finished difference Result 147467 states and 172040 transitions. [2022-03-18 21:04:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:50,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2022-03-18 21:04:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:50,751 INFO L225 Difference]: With dead ends: 147467 [2022-03-18 21:04:50,752 INFO L226 Difference]: Without dead ends: 147467 [2022-03-18 21:04:50,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:50,752 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:50,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 110 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-03-18 21:04:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 147465. [2022-03-18 21:04:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147465 states, 147461 states have (on average 1.1666542340008546) internal successors, (172036), 147461 states have internal predecessors, (172036), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147465 states to 147465 states and 172039 transitions. [2022-03-18 21:04:52,808 INFO L78 Accepts]: Start accepts. Automaton has 147465 states and 172039 transitions. Word has length 36 [2022-03-18 21:04:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:52,808 INFO L478 AbstractCegarLoop]: Abstraction has 147465 states and 172039 transitions. [2022-03-18 21:04:52,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 147465 states and 172039 transitions. [2022-03-18 21:04:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 21:04:52,891 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:52,891 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:52,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-18 21:04:52,891 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1229358491, now seen corresponding path program 1 times [2022-03-18 21:04:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:52,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139783876] [2022-03-18 21:04:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:52,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:52,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:52,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139783876] [2022-03-18 21:04:52,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139783876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:52,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:52,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:52,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854899799] [2022-03-18 21:04:52,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:52,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:52,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:52,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:52,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:52,911 INFO L87 Difference]: Start difference. First operand 147465 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:53,711 INFO L93 Difference]: Finished difference Result 237577 states and 270343 transitions. [2022-03-18 21:04:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:53,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2022-03-18 21:04:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:54,195 INFO L225 Difference]: With dead ends: 237577 [2022-03-18 21:04:54,195 INFO L226 Difference]: Without dead ends: 237577 [2022-03-18 21:04:54,195 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:54,197 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 134 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 83 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 [2022-03-18 21:04:54,197 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 83 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237577 states. [2022-03-18 21:04:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237577 to 229385. [2022-03-18 21:04:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229385 states, 229381 states have (on average 1.1428496693274508) internal successors, (262148), 229381 states have internal predecessors, (262148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229385 states to 229385 states and 262151 transitions. [2022-03-18 21:04:57,417 INFO L78 Accepts]: Start accepts. Automaton has 229385 states and 262151 transitions. Word has length 36 [2022-03-18 21:04:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:57,417 INFO L478 AbstractCegarLoop]: Abstraction has 229385 states and 262151 transitions. [2022-03-18 21:04:57,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 229385 states and 262151 transitions. [2022-03-18 21:04:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 21:04:57,591 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:57,591 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:57,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-18 21:04:57,591 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:57,592 INFO L85 PathProgramCache]: Analyzing trace with hash 718824314, now seen corresponding path program 1 times [2022-03-18 21:04:57,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:57,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688930124] [2022-03-18 21:04:57,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:57,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:57,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:57,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:57,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688930124] [2022-03-18 21:04:57,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688930124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:57,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:57,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:57,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616663648] [2022-03-18 21:04:57,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:57,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:57,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:57,622 INFO L87 Difference]: Start difference. First operand 229385 states and 262151 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:58,751 INFO L93 Difference]: Finished difference Result 286727 states and 315398 transitions. [2022-03-18 21:04:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2022-03-18 21:04:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:58,751 INFO L225 Difference]: With dead ends: 286727 [2022-03-18 21:04:58,751 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 21:04:58,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:58,752 INFO L912 BasicCegarLoop]: 135 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 142 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 [2022-03-18 21:04:58,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 142 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 21:04:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 21:04:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 21:04:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 21:04:58,753 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-03-18 21:04:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:58,753 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 21:04:58,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 21:04:58,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 21:04:58,755 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 21:04:58,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-18 21:04:58,759 INFO L718 BasicCegarLoop]: Path program 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, 1, 1] [2022-03-18 21:04:58,760 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 21:04:58,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:04:58 BasicIcfg [2022-03-18 21:04:58,762 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 21:04:58,762 INFO L158 Benchmark]: Toolchain (without parser) took 25567.02ms. Allocated memory was 198.2MB in the beginning and 7.6GB in the end (delta: 7.4GB). Free memory was 146.5MB in the beginning and 4.5GB in the end (delta: -4.4GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2022-03-18 21:04:58,762 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 162.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 21:04:58,762 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.96ms. Allocated memory is still 198.2MB. Free memory was 146.2MB in the beginning and 171.1MB in the end (delta: -24.8MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-03-18 21:04:58,762 INFO L158 Benchmark]: Boogie Preprocessor took 30.35ms. Allocated memory is still 198.2MB. Free memory was 171.1MB in the beginning and 169.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 21:04:58,763 INFO L158 Benchmark]: RCFGBuilder took 449.09ms. Allocated memory is still 198.2MB. Free memory was 169.4MB in the beginning and 155.8MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-03-18 21:04:58,763 INFO L158 Benchmark]: IcfgTransformer took 41.02ms. Allocated memory is still 198.2MB. Free memory was 155.8MB in the beginning and 154.0MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 21:04:58,763 INFO L158 Benchmark]: TraceAbstraction took 24791.63ms. Allocated memory was 198.2MB in the beginning and 7.6GB in the end (delta: 7.4GB). Free memory was 153.7MB in the beginning and 4.5GB in the end (delta: -4.4GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2022-03-18 21:04:58,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 162.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.96ms. Allocated memory is still 198.2MB. Free memory was 146.2MB in the beginning and 171.1MB in the end (delta: -24.8MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.35ms. Allocated memory is still 198.2MB. Free memory was 171.1MB in the beginning and 169.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 449.09ms. Allocated memory is still 198.2MB. Free memory was 169.4MB in the beginning and 155.8MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 41.02ms. Allocated memory is still 198.2MB. Free memory was 155.8MB in the beginning and 154.0MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 24791.63ms. Allocated memory was 198.2MB in the beginning and 7.6GB in the end (delta: 7.4GB). Free memory was 153.7MB in the beginning and 4.5GB in the end (delta: -4.4GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 205]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.7s, OverallIterations: 36, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.7s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5938 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5938 mSDsluCounter, 4200 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 254 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2762 IncrementalHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 3946 mSDtfsCounter, 2762 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 252 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=229385occurred in iteration=35, InterpolantAutomatonStates: 144, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.8s AutomataMinimizationTime, 36 MinimizatonAttempts, 32806 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1084 NumberOfCodeBlocks, 1084 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1048 ConstructedInterpolants, 0 QuantifiedInterpolants, 2356 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 36 InterpolantComputations, 36 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-18 21:04:58,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...